Crystal's MCW Coder HubH47.32 — Drusen of Optic Disc
⚠️ Important: Billability Note
H47.32 is a non-billable category header. It is valid for reference and classification purposes only. I may actually start doing them all like this instead of doing them individually. Laterality-specific child codes must be used for all HIPAA-covered transactions:
| Code | Description | Billable |
|---|---|---|
| H47.321 | Drusen of optic disc, right eye | ✅ Yes |
| H47.322 | Drusen of optic disc, left eye | ✅ Yes |
| H47.323 | Drusen of optic disc, bilateral | ✅ Yes |
| H47.329 | Drusen of optic disc, unspecified eye | ✅ Yes |
Tip
Always assign the laterality-specific code. H47.329 (unspecified) should only be used when the documentation genuinely does not specify laterality — query the provider if possible, as bilateral presentation is extremely common with optic disc drusen and H47.323 is appropriate in most cases.
Overview
H47.32x is the ICD-10-CM code family representing drusen of the optic disc (ODD) — calcific or hyaline deposits that accumulate within the substance of the optic nerve head, causing disc elevation and blurring of the disc margins. Optic disc drusen fall under Chapter VII of ICD-10-CM, Diseases of the Eye and Adnexa, within the broader category of Other Disorders of the Optic Disc (H47.3).
ODD are among the most clinically significant mimics of true papilledema, and their correct identification and coding carries major diagnostic and management implications. Unlike true papilledema — which signals elevated intracranial pressure and demands urgent neurological workup — optic disc drusen are a structural, usually benign, chronic finding. Failing to distinguish between the two can lead to unnecessary lumbar punctures, MRI studies, and patient anxiety, or conversely, missed diagnoses of life-threatening intracranial pathology.
ODD are composed of calcified mucoprotein concretions that form within the prelaminar optic nerve. They are believed to arise from disturbed axoplasmic transport within a structurally crowded (small scleral canal) optic nerve head. Over time, these deposits calcify, enlarge, and may become visible on the disc surface (“superficial drusen”) or remain buried beneath the disc surface (“buried drusen”), where they are far more difficult to detect clinically and more likely to be mistaken for papilledema. The condition is bilateral in approximately 75% of cases, though often asymmetric in appearance.
Code Classification & Hierarchy
H00-H59 Diseases of the Eye and Adnexa
└── H47 Other Disorders of Optic [2nd] Nerve and Visual Pathways
└── H47.3 Other Disorders of Optic Disc (non-billable)
├── H47.31 Coloboma of optic disc
├── H47.32 Drusen of optic disc (non-billable header) ← THIS FAMILY
│ ├── H47.321 Drusen of optic disc, right eye ✓
│ ├── H47.322 Drusen of optic disc, left eye ✓
│ ├── H47.323 Drusen of optic disc, bilateral ✓
│ └── H47.329 Drusen of optic disc, unspecified eye ✓
├── H47.33 Pseudopapilledema of optic disc
└── H47.39 Other disorders of optic disc
Coding Note:
H47.32 and H47.33 (pseudopapilledema) are closely related but distinct codes. ODD is the most common cause of pseudopapilledema, but they are not synonymous. When drusen are confirmed as the cause of apparent disc elevation, H47.32x is the appropriate code — not H47.33x. H47.33x is reserved for pseudopapilledema of other or unspecified cause.
Full Code Tree — H47.3 Other Disorders of Optic Disc
| Code | Description | Billable |
|---|---|---|
| H47.3 | Other disorders of optic disc | No |
| H47.31 | Coloboma of optic disc | No |
| H47.311 | Coloboma of optic disc, right eye | Yes |
| H47.312 | Coloboma of optic disc, left eye | Yes |
| H47.313 | Coloboma of optic disc, bilateral | Yes |
| H47.319 | Coloboma of optic disc, unspecified eye | Yes |
| H47.32 | Drusen of optic disc | No (header) |
| H47.321 | Drusen of optic disc, right eye | Yes |
| H47.322 | Drusen of optic disc, left eye | Yes |
| H47.323 | Drusen of optic disc, bilateral | Yes ← most common |
| H47.329 | Drusen of optic disc, unspecified eye | Yes |
| H47.33 | Pseudopapilledema of optic disc | No |
| H47.331 | Pseudopapilledema of optic disc, right eye | Yes |
| H47.332 | Pseudopapilledema of optic disc, left eye | Yes |
| H47.333 | Pseudopapilledema of optic disc, bilateral | Yes |
| H47.339 | Pseudopapilledema of optic disc, unspecified eye | Yes |
| H47.39 | Other disorders of optic disc | No |
| H47.391 | Other disorders of optic disc, right eye | Yes |
| H47.392 | Other disorders of optic disc, left eye | Yes |
| H47.393 | Other disorders of optic disc, bilateral | Yes |
| H47.399 | Other disorders of optic disc, unspecified eye | Yes |
Broader H47 Code Family — Condensed Reference
| Code Block | Description |
|---|---|
| H47.0x | Disorders of optic nerve NEC (ischemic neuropathy, hemorrhage in sheath, hypoplasia) |
| H47.1x | Papilledema (unspecified, ICP-related, hypotony-related, retinal-related, Foster-Kennedy) |
| H47.2x | Optic atrophy (primary, hereditary, glaucomatous, other) |
| H47.3x | Other optic disc disorders — Coloboma, Drusen, Pseudopapilledema, Other |
| H47.4x | Disorders of optic chiasm (inflammatory, neoplasm, vascular, other) |
| H47.5x | Disorders of other visual pathways (lateral geniculate, optic radiations) |
| H47.6x | Disorders of visual cortex (cortical blindness, inflammatory, neoplasm, vascular) |
| H47.9 | Unspecified disorder of visual pathways |
Includes
The following clinical presentations and synonymous terms are appropriately captured by H47.32x:
- Optic disc drusen (ODD), right/left/bilateral/unspecified
- Buried optic disc drusen (pre-calcific or calcified, not yet surface-visible)
- Superficial optic disc drusen (visible on fundoscopy as glistening, refractile deposits)
- Hyaline bodies of the optic disc (historical term)
- Calcified optic nerve head deposits
- Pseudopapilledema due to confirmed optic disc drusen
- Disc elevation secondary to buried drusen (when drusen confirmed as cause)
- Drusen-associated pseudopapilledema (bilateral presentation)
- Familial optic disc drusen
Excludes
Excludes 1 (cannot be coded simultaneously — mutually exclusive)
| Excluded Condition | Correct Code | Rationale |
|---|---|---|
| True papilledema (any type) | H47.10-H47.13 | ODD and true papilledema are distinct entities; if both disc swelling and drusen are documented simultaneously, query provider re: true vs. pseudo distinction |
| Pseudopapilledema, cause unspecified or non-drusen | H47.331-H47.339 | Use H47.33x only when cause of pseudopapilledema is unknown or not drusen |
| Drusen of the macula / retinal drusen | H35.36x | Retinal drusen (associated with AMD) are a completely separate entity from optic disc drusen; do not conflate |
Excludes 2 (may be reported with H47.32x when separately documented)
The following conditions may coexist and be coded alongside H47.32x when each is independently documented:
- Visual field defects (H53.4x) — ODD-related visual field loss (arcuate defects, nasal step, blind spot enlargement) is a real and codeable complication; document and code separately when present
- Retinitis pigmentosa (H35.52) — ODD has a known association with RP; both may be coded when documented
- Angioid streaks (H35.33) — associated with ODD in certain systemic conditions (pseudoxanthoma elasticum)
- Pseudoxanthoma elasticum (Q82.8) — systemic condition strongly associated with ODD
- Open-angle glaucoma (H40.1x) — may coexist; separate pathology
- Age-related macular degeneration with drusen (H35.31x) — retinal drusen are entirely separate from optic disc drusen; both may be coded if both are present and documented
Clinical Description & Pathophysiology
What Are Optic Disc Drusen?
Optic disc drusen are acellular, calcified concretions that develop within the substance of the optic nerve head, anterior to the lamina cribrosa. They are not related to retinal drusen (which are deposits beneath the retinal pigment epithelium associated with age-related macular degeneration) despite sharing the same name. The two entities are completely distinct in location, etiology, and clinical significance.
ODD are thought to form as a result of disturbed axoplasmic flow in retinal ganglion cell axons passing through a structurally small and crowded scleral canal (small disc diameter with a high axonal density). Mitochondria and other cellular organelles accumulate within the axons at the level of the prelaminar disc, where they calcify over time into hard concretions. The disc itself has no central cup (zero cup-to-disc ratio is characteristic), and the small scleral canal results in a congenitally crowded nerve head that predisposes to drusen formation.
Evolution: Buried to Superficial
ODD evolve over decades from a buried to a superficial state:
- Buried drusen — present in childhood and young adulthood; not visible on direct ophthalmoscopy; the overlying disc surface appears elevated with blurred margins, indistinguishable from true papilledema without ancillary testing; this is the stage most likely to generate concern for papilledema and prompt a neurology workup
- Superficial drusen — appear in later years as glistening, yellow-white, refractile, pearl-like nodules visible on the disc surface; once visible, the diagnosis is usually clinically obvious; risk of visual field loss is highest at this stage due to accumulated compressive effect on axons
Epidemiology & Inheritance
- Prevalence: approximately 1-2% of the general population based on autopsy and clinical studies
- Autosomal dominant inheritance with incomplete penetrance — positive family history should prompt screening of first-degree relatives
- Bilateral in approximately 70-75% of cases, though often asymmetric
- More common in Caucasians; less common in individuals of African descent (possibly related to larger average scleral canal diameter)
- Associated with: retinitis pigmentosa, Alagille syndrome, pseudoxanthoma elasticum (PXE), angioid streaks, Usher syndrome
Visual Consequences
ODD are historically considered benign, but they are not entirely harmless:
- Visual field defects — the most clinically significant complication; occur in up to 70-90% of patients with ODD over a lifetime; most commonly manifest as an enlarged blind spot, nasal step, or arcuate defect; caused by chronic compressive axonal damage from the enlarging drusen; progression is typically slow and subclinical
- Central visual acuity — usually preserved; significant central acuity loss is uncommon unless a complication arises
- Choroidal neovascularization (CNV) — a rare but vision-threatening complication; subretinal neovascular membrane may develop adjacent to the disc; presents with acute central vision loss or metamorphopsia; coded separately (H35.05x or H35.31x depending on context)
- Central retinal artery or vein occlusion — rare association; the anatomically crowded disc may predispose to vascular compression
- Anterior ischemic optic neuropathy (AION) — uncommon but reported; ODD may predispose to ischemic events at the nerve head
Diagnostic Testing — Key Modalities
| Test | Finding in ODD | Notes |
|---|---|---|
| B-scan ultrasonography | Hyperechoic (bright) nodules at the disc with acoustic shadowing | Highly sensitive and specific; calcified deposits reflect ultrasound strongly; the gold standard for confirming buried drusen |
| Fundus autofluorescence (FAF) | Bright autofluorescent signal at the disc head (drusen glow) | Very sensitive for superficial and some buried drusen; drusen autofluoresce due to their composition |
| OCT of the optic nerve | Hyporeflective or hyperreflective nodules within the prelaminar disc tissue; RNFL may appear thickened but no true axonal edema pattern | Enhanced depth imaging (EDI-OCT) improves detection of buried drusen |
| CT scan of orbits | Calcification at the disc head visible on thin-cut CT | Specific but not routinely used for diagnosis; incidentally identified on neuroimaging ordered for other reasons |
| Fundus photography | Disc elevation with blurred margins (buried); glistening surface nodules (superficial) | Standard documentation tool |
| Fluorescein angiography (FFA) | Autofluorescence of drusen on early frames (before dye injection); no disc leakage in late frames (unlike true papilledema) | Late disc leakage rules IN true papilledema; absence favors ODD |
| Visual field testing (HVF) | Enlarged blind spot; arcuate or nasal step defects | Essential for monitoring ODD-related visual field progression |
| MRI brain / MRV | Normal (obtained primarily to rule out intracranial pathology when papilledema vs. ODD is uncertain) | MRI does not directly visualize drusen |
Distinguishing ODD from True Papilledema
This distinction is one of the most important clinical and coding decisions in neuro-ophthalmology. The table below summarizes key differences:
| Feature | Optic Disc Drusen (H47.32x) | True Papilledema (H47.11) |
|---|---|---|
| Laterality | Bilateral (75%), often asymmetric | Bilateral, usually symmetric |
| C/D ratio | 0 (no cup) | Normal or reduced cup |
| Disc surface vessels | Clearly visible, not obscured | Obscured in moderate-severe papilledema |
| Splinter hemorrhages | Uncommon; when present, usually peripapillary | May be present at disc |
| TVOs (transient visual obscurations) | Uncommon | Highly characteristic |
| Pulsatile tinnitus / headache | Absent | Common in IIH |
| B-scan US | Hyperechoic nodules with shadowing | Normal |
| FAF | Bright autofluorescence at disc | Normal or absent |
| FFA late frames | No disc leakage | Disc leakage (hyperfluorescence) |
| OCT RNFL | Increased thickness, but distinct pattern | True axonal edema pattern |
| LP opening pressure | Normal | Elevated (>25 cmH₂O in IIH) |
| MRI | Normal | May show empty sella, flattened globes, tortuous ON sheaths |
| Urgency | Chronic, monitored | Neurological emergency |
HCC (Hierarchical Condition Category)
| Field | Detail |
|---|---|
| HCC Mapped | No |
| HCC Category | H47.32x is not a CMS-HCC risk-adjusting diagnosis code |
| RxHCC Mapped | No |
| Clinical Importance for HCC | H47.32x carries no direct HCC weight. However, associated or causative systemic conditions may carry risk-adjustment significance. Pseudoxanthoma elasticum (Q82.8), retinitis pigmentosa (H35.52), and complications such as choroidal neovascularization or vascular occlusion should be separately coded when present and documented, as some of these conditions or their complications may carry HCC or quality metric implications. Visual field loss (H53.4x) when documented as a complication of ODD should also be coded separately. |
MS-DRG Assignment
H47.32x as a principal or secondary diagnosis routes to the following MS-DRGs when the encounter is ophthalmologic in nature:
| MS-DRG | Title | Type |
|---|---|---|
| 124 | Other Disorders of the Eye with MCC | With Major Complication or Comorbidity |
| 125 | Other Disorders of the Eye without MCC | Without Major Complication or Comorbidity |
CC/MCC Status: H47.32x functions as a CC (Complication or Comorbidity) when reported as a secondary diagnosis, potentially elevating the DRG to the “with CC” variant and increasing the relative weight of the encounter. It does not qualify as an MCC.
Relative Weight Context (approximate, FY2025):
- MS-DRG 124 (with MCC): ~1.2-1.4 relative weight
- MS-DRG 125 (without MCC): ~0.7-0.9 relative weight
In most clinical scenarios, optic disc drusen is managed in the outpatient setting and will rarely serve as the reason for inpatient admission. Inpatient coding of H47.32x most commonly occurs as a secondary diagnosis when the patient is admitted for a related complication (e.g., choroidal neovascularization, AION, retinal vascular occlusion) or when it is documented as a relevant comorbidity during evaluation for other disorders. Verify current relative weights against the CMS IPPS Final Rule for the applicable fiscal year.
wRVU (Work RVU) — Professional Context
H47.32x is a diagnosis code and does not carry wRVUs directly. Work RVUs are assigned to CPT evaluation and procedure codes. The following CPT codes are commonly associated with the evaluation, diagnosis, and monitoring of optic disc drusen:
Evaluation & Management
| CPT Code | Description | wRVU (approx.) |
|---|---|---|
| 99204 | Office/outpatient visit, new patient, moderate complexity | 3.00 |
| 99205 | Office/outpatient visit, new patient, high complexity | 3.50 |
| 99214 | Office/outpatient visit, established, moderate complexity | 1.92 |
| 99215 | Office/outpatient visit, established, high complexity | 2.80 |
| 99253 | Inpatient consultation, moderate complexity | 3.72 |
| 99255 | Inpatient consultation, high complexity | 5.41 |
Ophthalmologic Examination
| CPT Code | Description | wRVU (approx.) |
|---|---|---|
| 92004 | Ophthalmological exam, new patient, comprehensive | 2.67 |
| 92014 | Ophthalmological exam, established, comprehensive | 1.97 |
| 92002 | Ophthalmological exam, new patient, intermediate | 1.43 |
| 92012 | Ophthalmological exam, established, intermediate | 1.10 |
Diagnostic Testing — Ophthalmic
| CPT Code | Description | wRVU (approx.) |
|---|---|---|
| 92083 | Visual field examination, extended threshold (HVF 24-2 or 30-2) | 0.92 |
| 92081 | Visual field, limited | 0.45 |
| 92134 | OCT, retinal nerve fiber layer / optic disc | 0.88 |
| 92133 | OCT, optic nerve head analysis | 0.88 |
| 92235 | Fundus photography with interpretation | 0.85 |
| 92240 | Indocyanine green angiography (ICG) | 1.30 |
| 92230 | Fluorescein angiography with interpretation | 1.20 |
| 92287 | Fundus photography, narrow field, with interpretation | 0.85 |
Ultrasound — Critical for ODD Diagnosis
| CPT Code | Description | wRVU (approx.) |
|---|---|---|
| 76512 | Ophthalmic ultrasound, B-scan | 0.76 |
| 76510 | Ophthalmic ultrasound, diagnostic, A and B scan | 0.90 |
Coding note:
B-scan ultrasound (76512 or 76510) is the highest-yield diagnostic test for confirming buried optic disc drusen and is a critical medical necessity code pair for H47.32x. Document the clinical indication clearly: “B-scan ultrasound to evaluate for buried optic disc drusen / confirm diagnosis in setting of disc elevation.”
Procedures — When Complications Arise
| CPT Code | Description | wRVU (approx.) |
|---|---|---|
| 67028 | Intravitreal injection (e.g., anti-VEGF for CNV complication) | 0.95 |
| 67036 | Pars plana vitrectomy (for vitreous hemorrhage if CNV-related) | 14.10 |
Note
wRVUs are approximate and subject to annual CMS Physician Fee Schedule revisions. Verify against the current year’s PFS.
Assistant Payable
H47.32x is a diagnosis code and does not directly govern assistant-at-surgery billing. Optic disc drusen itself has no specific direct surgical treatment. However, when complications of ODD require procedural intervention:
Intravitreal Injection for CNV (CPT 67028):
- Single-surgeon procedure; assistant is not applicable / not payable
- Performed in office or outpatient setting
Pars Plana Vitrectomy for vitreous hemorrhage or subretinal blood (CPT 67036-67042):
- Assistant surgeon: may be payable depending on complexity and payer; check MAC LCD and commercial payer policy; typically assistant indicator = 1 for complex posterior segment procedures
- Verify per individual payer
Subretinal / sub-ILM surgery (rare, for subretinal hemorrhage):
- Specialized posterior segment procedure; assistant may be payable at high-complexity retinal centers; verify per payer
Diagnostic Lumbar Puncture (62270) — if ordered to rule out true papilledema:
- Not a surgical procedure; assistant not applicable
Present on Admission (POA) Reporting
| Field | Detail |
|---|---|
| POA Required | Yes — for all inpatient admissions |
| Typical POA | Y — optic disc drusen is a chronic, pre-existing structural condition; virtually always present on admission |
| POA = N Scenario | Extremely unlikely for the drusen diagnosis itself; however, a complication of ODD (e.g., acute CNV, sudden visual loss) may be POA = N if it develops during the inpatient stay |
| POA = W | Clinically undetermined — rarely applicable for this chronic condition |
| Coding Note | Because ODD is typically a long-standing finding, POA = Y is almost universally correct. When coding a new complication of ODD that arises during hospitalization, assign POA = N to the complication code while maintaining POA = Y for H47.32x itself |
Coding Guidelines & Sequencing
When to Use H47.32x
Use H47.32x (with appropriate laterality character) when:
- The provider has confirmed optic disc drusen by clinical examination, B-scan ultrasound, fundus autofluorescence, OCT, or CT — i.e., the diagnosis is established, not just suspected.
- The encounter is specifically for evaluation, monitoring, or management of known or newly diagnosed ODD.
- ODD is documented as the confirmed cause of disc elevation previously interpreted as papilledema (this is a common scenario when the patient was referred from neurology after a negative papilledema workup).
- ODD is documented as a relevant comorbidity during an inpatient encounter for a complication or related condition.
When NOT to Use H47.32x
- Do not use H47.32 (the header code) alone — always assign a laterality-specific child code (H47.321-H47.329).
- Do not use when the disc elevation has not yet been confirmed as drusen — if workup is pending, H47.10 (unspecified papilledema) may be more appropriate until drusen are confirmed.
- Do not confuse with retinal drusen (H35.31x-H35.36x) — these are entirely different deposits in a different location associated with AMD; never use H47.32x for macular/retinal drusen.
- Do not use H47.33x (pseudopapilledema) when drusen are the confirmed cause — H47.32x is more specific and is the correct code when the etiology of pseudopapilledema is confirmed to be drusen.
- Do not use for suspected but unconfirmed ODD — if the provider documents “rule out drusen” or “disc elevation, etiology under investigation,” a sign/symptom code is more appropriate until the diagnosis is confirmed.
Laterality Selection
| Documentation | Code |
|---|---|
| ”Optic disc drusen, right eye” or “ODD OD” | H47.321 |
| ”Optic disc drusen, left eye” or “ODD OS” | H47.322 |
| ”Bilateral optic disc drusen” or “ODD OU” | H47.323 |
| Laterality not documented (query if possible) | H47.329 |
Note
Best practice: Query the provider if laterality is not documented. Given that ODD is bilateral in ~75% of cases, H47.323 is frequently the correct code. If the provider documents drusen in one eye and normal disc in the other, use the appropriate unilateral code.
Sequencing
As Principal Diagnosis: H47.32x may serve as principal when the visit or admission is specifically for evaluation of newly discovered ODD or management of a drusen-related complication (e.g., choroidal neovascularization, significant visual field loss requiring intervention).
As Secondary Diagnosis: H47.32x commonly appears as a secondary code when the patient is admitted for another condition and the drusen represent a documented, clinically relevant comorbidity (e.g., admitted for TIA workup and found to have pre-existing ODD on ophthalmic consultation).
With Complication Codes: When ODD has resulted in a documented complication (visual field defect, AION, CRAO, CNV), code the complication separately and sequence appropriately per ICD-10-CM guidelines. The complication is typically sequenced as principal or co-equal based on the reason for the encounter.
Coding Examples
Example 1 — Newly Identified Bilateral Disc Elevation, Workup Reveals Drusen
A 24-year-old male is referred to neuro-ophthalmology after his optometrist noted bilateral disc elevation at a routine exam. He is asymptomatic. Neurological review of systems is negative. MRI brain is normal. B-scan ultrasound demonstrates bilateral hyperechoic nodules at both disc heads with posterior acoustic shadowing. Fundus autofluorescence confirms bright autofluorescence at both disc heads. Diagnosis: bilateral optic disc drusen. No visual field defects on Humphrey 24-2 testing.
Principal Dx: H47.323 — Drusen of optic disc, bilateral (Workup is complete; confirmed — do not retain H47.10)
Example 2 — Bilateral ODD with Visual Field Loss
A 47-year-old woman with known bilateral optic disc drusen presents for annual monitoring. Humphrey visual field 24-2 reveals a new inferior nasal step in the left eye and an enlarged blind spot bilaterally. OCT RNFL shows inferior thinning OU. No choroidal neovascularization on FAF. She is counseled on progression.
Principal Dx: H47.323 — Drusen of optic disc, bilateral Secondary Dx: H53.452 — Other localized visual field defect, left eye Secondary Dx: H53.451 — Other localized visual field defect, right eye (Code the visual field defects as separate, documented complications)
Example 3 — ODD Mimicking Papilledema; Neurology Referral
A 16-year-old girl is admitted by her pediatrician for bilateral disc swelling with headaches. MRI brain is unremarkable. MRV is normal. Neurology orders LP — opening pressure is 18 cmH₂O (normal). Ophthalmology is consulted. B-scan US confirms hyperechoic buried drusen bilaterally. Fundus autofluorescence is positive. Diagnosis revised from suspected papilledema to bilateral optic disc drusen.
Principal Dx: H47.323 — Drusen of optic disc, bilateral (H47.10 assigned initially; revised to H47.323 once drusen confirmed) Secondary Dx: R51.9 — Headache, unspecified (Headache remains; no IIH confirmed; sequence as secondary symptom)
Example 4 — ODD with Choroidal Neovascularization Complication
A 58-year-old male with known right-eye optic disc drusen presents with sudden onset of decreased central vision and metamorphopsia in the right eye. OCT reveals a subfoveal choroidal neovascular membrane adjacent to the optic disc in the right eye. Anti-VEGF injection (bevacizumab) is administered intravitreally.
Principal Dx: H35.052 — Retinal neovascularization, right eye (or H35.321 if subfoveal CNV specified; use most specific code per documentation) Secondary Dx: H47.321 — Drusen of optic disc, right eye Procedure: CPT 67028 — Intravitreal injection, right eye
Example 5 — ODD as Incidental Secondary Diagnosis During Inpatient Admission
A 72-year-old man is admitted for evaluation of a TIA (transient ischemic attack). Ophthalmology is consulted because the patient mentions a history of blurry vision. Dilated fundoscopic exam reveals bilateral disc drusen (previously documented in outpatient records). Visual fields are stable. No new ocular pathology identified. ODD documented as a relevant comorbidity.
Principal Dx: G45.9 — Transient cerebral ischemic attack, unspecified Secondary Dx: H47.323 — Drusen of optic disc, bilateral POA: Y for H47.323 (pre-existing, chronic condition)
Example 6 — Unilateral Drusen, Right Eye Only Confirmed
A 35-year-old woman is evaluated for right disc elevation found during refraction. B-scan US confirms hyperechoic nodule at the right disc head. Left disc is normal on all ancillary testing. Provider documents: “Right optic disc drusen confirmed. Left disc normal.”
Principal Dx: H47.321 — Drusen of optic disc, right eye (Do not assign H47.323 — left eye is confirmed normal)
Example 7 — ODD with Associated Retinitis Pigmentosa
A 42-year-old male with known retinitis pigmentosa presents for ophthalmologic evaluation. Dilated exam and OCT confirm bilateral optic disc drusen in addition to characteristic RP changes (bone spicule pigmentation, attenuated vessels, waxy disc pallor). Both conditions are documented.
Principal Dx: H35.52 — Pigmentary retinal dystrophy (Retinitis Pigmentosa) Secondary Dx: H47.323 — Drusen of optic disc, bilateral (Both conditions documented; ODD as a known RP association coded separately)
Differential Coding — Related Codes
| Clinical Scenario | Correct Code |
|---|---|
| ODD, right eye | H47.321 |
| ODD, left eye | H47.322 |
| ODD, bilateral | H47.323 |
| ODD, laterality unspecified | H47.329 |
| Pseudopapilledema, cause unspecified (not drusen) | H47.331-H47.339 |
| Unspecified papilledema (etiology unknown, workup pending) | H47.10 |
| Papilledema due to elevated ICP (confirmed) | H47.11 |
| Papilledema due to retinal disorder | H47.13 |
| Drusen of macula / retinal drusen (AMD-related) | H35.311-H35.36x |
| Coloboma of optic disc, bilateral | H47.313 |
| Visual field defect, enlarged blind spot | H53.451-H53.459 |
| Ischemic optic neuropathy complicating ODD | H47.011-H47.019 |
| CNV complicating ODD | H35.321 or H35.052 depending on location and documentation |
| Retinitis pigmentosa with ODD | H35.52 + H47.323 |
| Pseudoxanthoma elasticum with ODD | Q82.8 + H47.323 |
| Angioid streaks with ODD | H35.33 + H47.323 |
Documentation Tips for Providers
Precise provider documentation drives accurate code selection and medical necessity. For optic disc drusen, document the following:
- Laterality — always specify right eye, left eye, or bilateral (OU); do not leave laterality ambiguous
- Confirmed vs. suspected — state explicitly whether drusen are confirmed (e.g., “bilateral optic disc drusen confirmed by B-scan US and FAF”) vs. under investigation; coding requires confirmed diagnosis
- Ancillary test results — document which tests were performed and findings: B-scan US findings (hyperechoic nodules, acoustic shadowing), FAF findings (autofluorescence pattern), OCT findings (pre-laminar nodules, RNFL thickness)
- Distinction from true papilledema — if the encounter involves ruling out papilledema, document the basis for the distinction: “no disc leakage on FFA late frames,” “LP opening pressure normal at X cmH₂O,” “B-scan confirms drusen as cause of disc elevation”
- Visual field status — document whether formal visual field testing was performed and if defects are present, stable, or progressive
- Complications — explicitly document any complications: “no evidence of CNV,” or “new subfoveal CNV right eye” — this directly drives additional code assignment
- Associated systemic conditions — document relevant associations (RP, PXE, angioid streaks) when present, as these support separate secondary codes and medical necessity for broader workup
- Family history — note any family history of ODD, as this is an autosomal dominant condition; supports medical necessity for genetic counseling referral if applicable
Quick Reference Summary
| Field | Detail |
|---|---|
| Code | H47.32 (header, non-billable) |
| Billable Codes | H47.321 (OD) / H47.322 (OS) / H47.323 (OU) / H47.329 (unspecified) |
| Description | Drusen of optic disc |
| Code Type | ICD-10-CM Diagnosis |
| HIPAA Valid | Yes — child codes only |
| Chapter | VII — Diseases of the Eye and Adnexa |
| HCC | No |
| CC/MCC Status | CC (as secondary diagnosis) |
| MS-DRG | 124 (with MCC) / 125 (without MCC) |
| POA | Y (virtually always — chronic, pre-existing structural condition) |
| Most Common Laterality Code | H47.323 (bilateral — ~75% of cases) |
| Do Not Confuse With | H35.31x-H35.36x (retinal/macular drusen); H47.33x (pseudopapilledema, non-drusen cause); H47.10 (unspecified papilledema) |
| Key Diagnostic CPT | 76512 (B-scan US); 92134 (OCT); 92235 (fundus photography); 92083 (visual fields); 92230 (FFA) |
| No Direct Surgical Treatment | Treat complications (CNV → 67028 anti-VEGF; AION → supportive) |
| Upgrade Path | If true papilledema found concurrently → H47.11; if CNV complication → H35.052 or H35.32x |
FYI:
The most common error with this code family is assigning H47.329 (unspecified) by default when H47.323 (bilateral) is almost always the clinically correct choice — ODD is bilateral in roughly three-quarters of patients, so always check the documentation and query if laterality is absent. The H47.32x vs. H47.33x distinction is one coders frequently get wrong. H47.33x (pseudopapilledema) should only be used when the cause of pseudopapilledema is unknown or something other than drusen. Once drusen are confirmed as the cause, H47.32x is always more specific and wins. Retinal drusen vs. optic disc drusen is the other trap — H35.31x and its siblings (AMD-associated macular drusen) are completely unrelated to H47.32x despite sharing the same name. Both can coexist and both can be coded if documented, but they are never interchangeable.