👁️ CPT 76512 — Ophthalmic Ultrasound, Diagnostic; B-Scan (With Or Without Superimposed Non-Quantitative A-Scan)
Quick Reference
wRVU: 0.29 (verify against RVU26A) | Global Period: 000 | Assistant Payable: ❌ No | Bilateral Indicator: 3 Rule: A bilateral indicator of 3 means no payment reduction applies when the procedure is performed on both eyes in the same session — each side is reimbursed at 100% of the allowed amount, subject only to standard multiple-procedure pricing where applicable. Because 76512 is a diagnostic test rather than a surgical procedure, it carries no assistant-surgeon or co-surgeon applicability and is generally exempt from modifier -51 multiple-procedure reduction rules.
📋 Clinical Description
CPT 76512 describes a contact B-scan ophthalmic ultrasound, a non-invasive echographic study that produces a two-dimensional, cross-sectional image of the globe, vitreous cavity, and orbital soft tissue. A small handheld transducer probe is placed directly against the closed eyelid or topically anesthetized globe, and high-frequency sound waves are reflected off internal ocular structures to generate a real-time image on the display. This code may include a superimposed non-quantitative A-scan (a one-dimensional waveform overlay used to characterize tissue reflectivity) but does not require it — the descriptor’s “with or without” language means the A-scan overlay does not change code selection. 76512 is distinguished from 76510, which bundles a full quantitative A-scan measurement into the same encounter, and from 76511, which reports the quantitative A-scan alone without any B-scan imaging.
This procedure is most often ordered when a physical media opacity — a dense cataract, vitreous hemorrhage, or corneal scarring — prevents the ophthalmologist from directly visualizing the retina, choroid, or vitreous with a standard ophthalmoscope or slit-lamp biomicroscope. Vitreous hemorrhage (H43.1-) is the most common indication encountered in both outpatient retina clinics and inpatient consultation settings, since blood in the vitreous cavity obscures the fundus view and B-scan becomes the only reliable way to rule out an underlying retinal detachment or intraocular mass. When the diagnostic question is a suspected retinal detachment rather than a media opacity, the retinal detachment codes (H33.041, H33.042) — not the vitreous hemorrhage codes — should drive primary diagnosis selection if detachment is confirmed on the study.
This procedure may be performed in the following clinical contexts:
- Dense cataract precluding fundus exam — B-scan is used preoperatively to rule out posterior segment pathology (retinal detachment, mass, or dense vitreous debris) before cataract surgery is scheduled, since the surgeon cannot otherwise visualize the retina through the opacified lens.
- Vitreous hemorrhage of unclear etiology — Ordered emergently or urgently to determine whether the retina remains attached beneath the hemorrhage, which directly changes surgical urgency and management.
- Suspected choroidal or intraocular mass — B-scan characterizes lesion shape, internal reflectivity, and extent when direct visualization is limited or when a mass is incidentally noted and needs baseline documentation.
- Trauma with suspected globe rupture or intraocular foreign body — Performed cautiously (often with a closed-lid technique) in the emergency or inpatient trauma setting to assess posterior segment integrity without direct manipulation of an open globe.
- Post-vitrectomy or post-retinal-surgery follow-up with persistent opacity — Used to monitor for recurrent detachment, hemorrhage, or silicone oil/tamponade status when the operated eye cannot be adequately visualized clinically.
🔬 Anatomical & Procedural Considerations
| Variant | Mechanism | Key Notes |
|---|---|---|
| Contact B-scan (standard) | The transducer probe is placed directly against the closed eyelid (or topically anesthetized globe) and swept through multiple meridians to build a composite two-dimensional cross-sectional image of the vitreous, retina, choroid, and proximal orbit. Real-time dynamic imaging allows the examiner to assess mobility of vitreous opacities versus a fixed, taut retinal membrane. | The closed-lid contact technique is preferred in acute trauma or suspected open-globe cases to avoid direct pressure on a compromised globe. Documentation should specify which meridians were scanned and whether kinetic (dynamic) technique was used to differentiate mobile vitreous debris from a fixed retinal detachment. |
| B-scan with superimposed non-quantitative A-scan | A one-dimensional A-scan waveform is displayed simultaneously with the B-scan image to help characterize tissue reflectivity — useful for distinguishing a solid choroidal mass from vitreous hemorrhage based on internal echo pattern, without performing formal quantitative amplitude measurements. | This is still reported as 76512, not 76510, because the A-scan here is non-quantitative and only supplements the B-scan interpretation; it does not generate the separate measurement report required for the quantitative A-scan code family. |
| Immersion (water bath) technique | A water-filled scleral shell or standoff device is used instead of direct contact, most often for anterior segment structures. | 76512 refers specifically to the posterior segment contact technique; when the anterior segment/immersion approach or high-resolution biomicroscopy is used, 76513 is the correct code instead, and reporting 76512 for that technique is a coding error. |
Clinical Pearl
The single most important documentation element for 76512 is a clear statement of why direct visualization was not possible (e.g., “4+ vitreous hemorrhage precluding fundus view”) and a description of the sonographic findings by structure (vitreous, retina, choroid). Payers frequently deny or downcode ophthalmic ultrasound claims that lack medical necessity language explaining the obstructed view, so this should appear explicitly in the interpretation and report, not just in the referring diagnosis.
✅ Procedure Includes
- Topical anesthetic administration to the ocular surface when a direct-contact (non-lid) technique is used.
- Placement and manipulation of the ultrasound transducer across multiple scanning meridians of the affected eye.
- Real-time dynamic (kinetic) assessment of vitreous mobility versus retinal membrane fixation when clinically indicated.
- Superimposed non-quantitative A-scan overlay, when performed, for tissue reflectivity characterization.
- Physician interpretation and generation of a written diagnostic report describing findings by ocular structure.
- Image capture and permanent storage of representative B-scan images to support the interpretation.
❌ Excludes / Do Not Report Together
| Code | Description | Relationship to 76512 |
|---|---|---|
| 76510 | Ophthalmic ultrasound, diagnostic; B-scan and quantitative A-scan performed during the same patient encounter | NCCI bundles 76511 and 76512 into 76510 when both a B-scan and a quantitative A-scan measurement are performed at the same encounter — only 76510 is separately payable in that scenario, and reporting 76512 alongside a quantitative A-scan on the same date is a bundling error. |
| 76511 | Ophthalmic ultrasound, diagnostic; quantitative A-scan only | 76511 reports quantitative A-scan measurement without any B-scan imaging; it is mutually exclusive with 76512 for the same session because performing both together converts the correct code selection to 76510. |
| 76513 | Ophthalmic ultrasound, diagnostic; anterior segment ultrasound, immersion (water bath) B-scan or high resolution biomicroscopy, unilateral or bilateral | 76513 is reserved for anterior segment immersion technique or ultrasound biomicroscopy; when the study targets the posterior segment via standard contact technique, 76512 is used instead, and the two should not be reported for the same anatomic target in the same session. |
| 92225/92226 (fundus photography) | Ophthalmoscopy with fundus photography | Not bundled by NCCI, but medical necessity should be independently documented for each service if both are performed the same day, since both target visualization of posterior segment structures through different modalities. |
| E/M codes (992xx / 920xx) | Office visit, any level | 76512 is a diagnostic test rather than a minor procedure, so no global-period E/M bundling applies; a same-day E/M is billed on its own merits without requiring modifier -25 unless payer policy specifically requires it. |
Bundling Alert — Global Period Is 000
A 000-day global period means there is no post-procedure global surgical package associated with 76512 — it carries no included follow-up visits, and any subsequent E/M encounter is billed independently on its own merits. The most common audit finding for this code family is reporting 76511 and 76512 as separate lines when both a quantitative A-scan and a B-scan were actually performed at the same encounter; NCCI edits will deny the component code, and MACs frequently flag repeat billing of 76512 without documented new clinical indication as a medical-necessity concern.
🌳 Code Tree — Radiology: Diagnostic Ultrasound (Head and Neck)
CPT 76506-76999 Radiology: Diagnostic Ultrasound Procedures
│
├── 76506-76509 General/Other Diagnostic Ultrasound (Non-Ophthalmic)
│ ├── 76506 Echoencephalography, real time with image documentation
│ └── 76509 Echocardiography, fetal, for cardiac malformation
│
├── 76510-76519 Diagnostic Ultrasound — Ophthalmic (Head and Neck)
│ ├── 76510 Ophthalmic ultrasound, diagnostic; B-scan and quantitative A-scan performed during the same patient encounter (Global: 000)
│ ├── 76511 Ophthalmic ultrasound, diagnostic; quantitative A-scan only (Global: 000)
│ ├── ▶▶ 76512 ◀◀ Ophthalmic ultrasound, diagnostic; B-scan (with or without superimposed non-quantitative A-scan) ← YOU ARE HERE (Global: 000)
│ ├── 76513 Ophthalmic ultrasound, diagnostic; anterior segment ultrasound, immersion (water bath) B-scan or high resolution biomicroscopy (Global: 000)
│ └── 76516 Ophthalmic biometry by ultrasound echography, A-scan (Global: 000)
│
└── 76519 Ophthalmic biometry by ultrasound echography, A-scan; with intraocular lens power calculation💰 RVU & Reimbursement Profile
| Component | Value |
|---|---|
| Work RVU (wRVU) | 0.29 (verify against current CMS MPFS RVU26 file — historical values have ranged 0.29-0.32) |
| Global Period | 000 (same day) |
| Bilateral Indicator | 3 — no payment reduction applies; each eye is reimbursed at 100% of the allowed amount when billed with modifier -50, -RT/-LT, or a units value of 2 |
| Assistant Surgeon | ❌ Not payable — diagnostic test, not a surgical procedure |
| Co-Surgeon | ❌ Not applicable |
| Team Surgery | ❌ Not applicable |
| PC/TC Split | ✅ Yes — Professional (-26) and Technical (-TC) components are separately billable when the interpreting physician and the facility/equipment owner are different entities |
| Modifier -51 Exempt | Yes — diagnostic radiology test codes are generally exempt from the multiple-procedure reduction that -51 triggers |
| Anesthesia | Topical ophthalmic anesthetic only when direct-contact technique is used; no separately billable anesthesia service |
Bilateral Billing Rules
CPT 76512 carries a bilateral indicator of 3, meaning both eyes can be scanned and billed in the same session without the standard 150%/50% bilateral payment reduction that applies to indicator-1 codes. When both eyes require B-scan, the study should be reported either as a single line with modifier -50, or as two lines with modifiers -RT and -LT, each reimbursed at 100% of the allowed amount. Coders should confirm the receiving MAC’s preferred billing format, since some jurisdictions require the -50 single-line convention while others expect separate -RT/-LT lines with a units value of 2.
No National LCD Exists…
| MAC / Jurisdiction | Policy covering 76512 | Notes |
|---|---|---|
| First Coast Service Options (FCSO), Jurisdiction N | LCD L33904 – “B-Scan” | Bundles 76510, 76512, 76513; last major revision effective 2018, still cited as active reference aao |
| Palmetto GBA, Jurisdictions J/M | Article/LCD tied to “Scanning Computerized Ophthalmic Diagnostic Imaging (SCODI)” family (LCD ID 34061-type documents) | Coverage details, ICD-10 pairings, and frequency limits sit in the companion Billing & Coding Article, not the LCD text cms+1 |
| Novitas Solutions, Jurisdictions H/L | LCD L35038 – “Scanning Computerized Ophthalmic Diagnostic Imaging” | Listed under Novitas’ current Ophthalmology specialty resource page (updated Jan 2026) novitas-solutions |
| CGS, WPS, NGS and other MACs | Similar SCODI or “Ophthalmic A & B Scans” policies, contractor-specific | Historically covered ICD-10 ranges corresponding to intraocular tumors, retinal detachment, vitreous hemorrhage, and similar obstructed-view diagnoses, with frequency caps (commonly up to 4x/year/eye) cms |
Tip
Go to the CMS Medicare Coverage Database (MCD) Search tool, enter “76512” in the keyword/code box, and select your specific state from the jurisdiction dropdown. For most jurisdictions today, you’ll actually land on a Billing & Coding Article rather than the LCD itself, because CMS shifted CPT/HCPCS code lists and covered ICD-10-CM diagnoses out of LCD bodies and into companion Articles a few years back — the LCD document now mainly covers indications and medical necessity language.
Common coverage themes across MACs
Even though the exact LCD/Article ID differs by jurisdiction, most policies covering 76512 share consistent medical necessity logic worth noting for your ICD-10 pairing work:
Medical necessity generally requires an obstructed view of intraocular structures (dense cataract, corneal opacity, vitreous hemorrhage) or suspected posterior segment pathology like retinal detachment, choroidal/intraocular tumor, or vitreoretinal disease.
Frequency limitations commonly cap the service at around four times per year per eye for chronic conditions, though this varies by contractor.
Modifiers -26 (professional component) and -TC (technical component) split the reading from the equipment/technical performance, both of which must map to allowable diagnosis codes in the relevant Article.
Routine screening or use in place of a covered, more specific diagnostic test (like when the fundus is fully visible) is typically excluded from coverage.
🏷️ Modifier Reference
| Modifier | Name | When to Apply |
|---|---|---|
| -RT | Right Side | Applied when the B-scan is performed on the right eye only; required for unilateral studies to establish laterality and support bilateral indicator-3 billing when combined with a separate -LT line. |
| -LT | Left Side | Applied when the B-scan is performed on the left eye only; used the same way as -RT for laterality-specific billing on a separate claim line. |
| -50 | Bilateral Procedure | Applied when both eyes are scanned in the same session as a single billed line, consistent with the MAC’s preferred bilateral billing convention for indicator-3 codes. |
| -26 | Professional Component | Applied by the interpreting physician when the equipment and technical performance of the study belong to a separate facility or entity, reflecting only the interpretation and report. |
| -TC | Technical Component | Applied by the facility or practice that owns the ultrasound equipment and performs the technical acquisition of images when the interpreting physician bills separately with -26. |
| -59 | Distinct Procedural Service | Applied when 76512 is inappropriately bundled with another same-day ultrasound or imaging code and documentation supports a genuinely distinct anatomic site or separate diagnostic indication. |
| -76 | Repeat Procedure by Same Physician | Applied when the B-scan is medically necessary to repeat on the same day by the same physician (e.g., re-scan after initial equivocal findings); documentation must state the reason for repetition. |
| -77 | Repeat Procedure by Another Physician | Applied when a second physician repeats the B-scan on the same day for an independent clinical reason, such as a consulting specialist confirming findings. |
| Modifiers -25, -24, -51, -58, -78, -79, and -E1 through -E4 are not applicable to 76512: it is a diagnostic radiology test rather than a minor or major surgical procedure, so it carries no global period requiring unrelated-visit or staged/return-to-OR modifiers, is generally -51 exempt, and has no eyelid-quadrant component that would invoke the E-series modifiers. |
🩺 Common ICD-10-CM Pairings
Vitreous Hemorrhage (Most Common Indication)
| ICD-10 Code | Description | HCC? | Clinical Notes |
|---|---|---|---|
| H43.13 | Vitreous hemorrhage, bilateral | ❌ No | Use when hemorrhage is documented in both eyes; B-scan is typically performed on each affected eye separately with laterality modifiers even though the diagnosis code itself is bilateral. |
| H43.12 | Vitreous hemorrhage, left eye | ❌ No | Most specific left-eye code; supports medical necessity for a left-eye B-scan when the fundus view is obscured by hemorrhage. |
| H43.10 | Vitreous hemorrhage, unspecified eye | ❌ No | Use only when laterality is not documented; query the ordering provider when possible, since an unspecified-eye code paired with a laterality-modified CPT line is a common audit mismatch. |
Retinal Detachment (When Confirmed on B-Scan)
| ICD-10 Code | Description | HCC? | Clinical Notes |
|---|---|---|---|
| H33.041 | Total retinal detachment, right eye | ❌ No | Reported as the confirmed finding when B-scan demonstrates a fixed, taut retinal membrane rather than mobile hemorrhage or debris; drives urgent surgical referral. |
| H33.042 | Total retinal detachment, left eye | ❌ No | Left-eye equivalent; sequencing should reflect the confirmed post-imaging diagnosis rather than the pre-imaging suspected indication once the study is finalized. |
Choroidal/Intraocular Mass (Secondary Indication)
| ICD-10 Code | Description | HCC? | Clinical Notes |
|---|---|---|---|
| H25.043 | Anterior subcapsular polar age-related cataract, bilateral | ❌ No | Represents the dense-cataract indication where B-scan is used preoperatively to evaluate the posterior segment through an otherwise unviewable lens; confirm laterality matches the operative eye. |
Coding Specificity Reminder
Laterality is the single most frequently missed specificity element for this code family: the CPT modifier (-RT/-LT/-50) and the ICD-10-CM diagnosis laterality must agree, or the claim is at high risk of a laterality mismatch denial. When the referring documentation only states “vitreous hemorrhage” without laterality, query the provider before defaulting to the unspecified-eye code, since unspecified codes paired with a laterality-specific CPT modifier create an internally inconsistent claim.
🏥 MS-DRG Considerations (Inpatient)
Inpatient Coding Reminder
CPT 76512 is a diagnostic test that does not itself drive MS-DRG assignment. When performed during an inpatient admission — for example, an ICU trauma patient with suspected vitreous hemorrhage or a postoperative retina patient with an obscured fundus view — the B-scan supports the diagnostic workup and clinical decision-making, but the case continues to group based on the underlying principal diagnosis and any qualifying OR procedures (e.g., open globe repair, vitrectomy). An ICD-10-PCS code may be assigned for completeness on the UB-04/institutional claim, but it will have no meaningful independent impact on DRG weight.
🔧 ICD-10-PCS Equivalents (Inpatient Facility Coding)
Note
Facility (institutional) coders assign an ICD-10-PCS code from the Imaging section for inpatient ophthalmic ultrasound, but because Imaging-section codes do not affect MS-DRG grouping, this crosswalk exists mainly for completeness of the inpatient procedure record rather than reimbursement impact.
| PCS Code | Full Description | Applicable Modality |
|---|---|---|
B240ZZZ | Ultrasonography, Eye, Right, No Contrast, No Qualifier | Standard contact B-scan, right eye |
B241ZZZ | Ultrasonography, Eye, Left, No Contrast, No Qualifier | Standard contact B-scan, left eye |
B244ZZZ | Ultrasonography, Eye, Bilateral, No Contrast, No Qualifier | Standard contact B-scan, both eyes same session |
PCS Character Analysis — B240ZZZ
| Position | Character | Value | Definition |
|---|---|---|---|
| 1 | Section | B | Imaging |
| 2 | Body System | 2 | Eye |
| 3 | Root Type | 4 | Ultrasonography |
| 4 | Body Part | 0 | Eye, Right |
| 5 | Contrast | Z | None |
| 6 | Qualifier | Z | None |
| 7 | Qualifier | Z | None |
PCS Root Type Note
- Use body part value 0 (Right) or 1 (Left) when the study is documented as unilateral, matching the CPT laterality modifier used on the professional claim.
- Use body part value 4 (Bilateral) only when both eyes are explicitly documented as scanned in the same encounter.
- Because Imaging-section PCS codes carry no CC/MCC weight and do not group to a surgical DRG, precise root-type selection matters far more for accurate facility utilization data than for reimbursement.
📝 Coding Examples
Example 1 — Office: Vitreous Hemorrhage Obscuring Fundus View
Clinical Scenario: A 68-year-old male with proliferative diabetic retinopathy presents with sudden vision loss in the right eye. Dilated fundus exam is impossible due to a dense vitreous hemorrhage. The ophthalmologist performs a contact B-scan of the right eye, documenting mobile echogenic debris in the vitreous cavity with no evidence of a fixed retinal membrane or detachment. The report explicitly states the fundus view was obstructed by hemorrhage, necessitating ultrasound evaluation.
| Field | Code | Rationale |
|---|---|---|
| CPT | 76512-RT | Unilateral contact B-scan of the right eye; -RT modifier documents laterality consistent with the diagnosis. |
| PDx | H43.12 | Vitreous hemorrhage, left eye — note: confirm laterality matches encounter (right eye in this vignette would be H43.11); always verify the specific laterality code against the actual documented eye before finalizing. |
Note
No separate E/M modifier is needed since 76512 has no global period; a same-day office visit for the diabetic retinopathy management would be billed independently on its own medical-necessity merits.
Example 2 — Outpatient Hospital: Bilateral B-Scan Preoperative to Cataract Surgery
Clinical Scenario: A 74-year-old female with dense bilateral cataracts is scheduled for sequential cataract surgery. Because the posterior segment cannot be visualized through either lens, the surgeon orders bilateral B-scans to rule out occult retinal pathology before surgical clearance. Both eyes are scanned in the same outpatient encounter, with normal vitreous and attached retina confirmed bilaterally.
| Field | Code | Rationale |
|---|---|---|
| CPT 1 | 76512-50 | Bilateral B-scan reported as a single line with modifier -50, consistent with bilateral indicator 3 and no payment reduction. |
| PDx | H25.043 | Anterior subcapsular polar age-related cataract, bilateral — supports medical necessity for preoperative posterior segment clearance. |
Warning
Example 3 — Inpatient: Trauma Patient with Suspected Open Globe
Clinical Scenario: A 29-year-old male is admitted to the trauma ICU following blunt facial trauma with a hyphema and suspected open globe injury on the left. Direct fundoscopic exam is deferred due to concern for globe rupture. Ophthalmology performs a closed-lid contact B-scan to assess posterior segment integrity without applying pressure to the globe, identifying a moderate vitreous hemorrhage with an attached retina and no definite intraocular foreign body.
| Field | Code | Rationale |
|---|---|---|
| CPT | 76512-LT | Unilateral left-eye B-scan performed via closed-lid technique appropriate for suspected open globe. |
| PDx | H43.12 | Vitreous hemorrhage, left eye — reflects the confirmed sonographic finding driving continued monitoring. |
Global period reminder
CPT 76512 carries a 000-day global period, so there is no bundled follow-up window; any repeat B-scan later in the same admission to monitor hemorrhage clearance or retinal status is separately reportable with modifier -76 if performed by the same ophthalmologist, provided the medical necessity for repetition is clearly documented.
⚠️ Common Coding Pitfalls
-
Billing 76511 and 76512 together instead of 76510: When both a quantitative A-scan and a B-scan are performed at the same encounter, NCCI requires 76510 rather than separately reporting 76511 and 76512; billing both component codes will trigger an automatic bundling denial.
-
Laterality mismatch between CPT modifier and ICD-10-CM code: The -RT/-LT/-50 modifier on the CPT line must agree with the laterality specified in the ICD-10-CM diagnosis; a right-eye CPT modifier paired with a left-eye or unspecified diagnosis code creates an internally inconsistent claim that payers frequently flag.
-
Confusing 76512 with 76513 for anterior segment studies: 76512 applies to standard posterior segment contact B-scan, while 76513 is reserved for anterior segment immersion (water bath) technique or high-resolution biomicroscopy; using 76512 when an immersion anterior segment study was actually performed is a technique-mismatch error.
-
Missing documentation of the obstructed-view indication: Payers require explicit documentation of why direct visualization was not possible (e.g., dense cataract, hemorrhage); claims lacking this medical-necessity language are at high risk of denial regardless of correct code selection.
-
Incorrect bilateral billing format for indicator-3 codes: Submitting a bilateral B-scan as two full-value lines without modifier -50 or -RT/-LT designation, or using the wrong MAC-preferred format (single -50 line versus separate -RT/-LT lines with units of 2), can result in underpayment or rejected claims.
-
Repeating the study without new medical necessity: Billing 76512 again in a short interval without a documented change in clinical status or a new diagnostic question is a common target for payer medical-necessity review, particularly for serial vitreous hemorrhage monitoring.
📎 Sources
1 AMA CPT 2026 Professional Edition · 2 CMS CY2026 Medicare Physician Fee Schedule Final Rule (CMS-1832-F) · 3 CMS RVU26A Relative Value Files (verify wRVU) · 4 NCCI Policy Manual, Chapter IX (Radiology), 2025-2026 · 5 ICD-10-CM Official Guidelines for Coding and Reporting FY2026 · 6 ICD-10-PCS Official Guidelines for Coding and Reporting FY2026 · 7 AAPC — “Navigate the Nuances of Ophthalmic Ultrasound Coding,” Ophthalmology Coding Alert · 8 American Academy of Ophthalmology — “Competent Coding for Ophthalmic Radiology Services”
AMA CPT Professional Edition (2026); CMS Physician Fee Schedule Final Rule CMS-1832-F (2026); CMS RVU26A Relative Value Files (2026); CMS National Correct Coding Initiative Policy Manual, Chapter IX (2025-2026); ICD-10-CM Official Guidelines for Coding and Reporting (FY2026); ICD-10-PCS Official Guidelines for Coding and Reporting (FY2026); AAPC, Ophthalmology Coding Alert, “Navigate the Nuances of Ophthalmic Ultrasound Coding”; American Academy of Ophthalmology, “Competent Coding for Ophthalmic Radiology Services”