👁️ MDC 02 — Eye (Ophthalmology)

MDC 02 Scope

MDC 02 covers diseases and disorders of the eye and ocular adnexa — the globe, orbit, eyelid, lacrimal apparatus, conjunctiva, cornea, lens, vitreous, retina, and optic nerve. Principal diagnosis must fall within the ICD-10-CM eye chapter (H00-H59) or selected neoplasm/trauma codes mapped to MDC 02.

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📌 Specialty Context — The Inpatient Reality

Most Ophthalmology Is Outpatient

The vast majority of ophthalmic procedures — cataract extraction, glaucoma drainage implants, retinal detachment repair, intravitreal injections — are performed outpatient and generate no inpatient DRG. MDC 02 inpatient cases are relatively uncommon and typically involve:

• Severe ocular trauma or penetrating injury
• Endophthalmitis requiring systemic antibiotics and/or vitrectomy
• Complications of prior eye procedures requiring hospitalization
• Diabetic eye disease (tractional detachment) requiring inpatient vitreoretinal surgery
• Orbital cellulitis / abscess threatening vision or CNS spread
• Patients admitted primarily for a non-ophthalmic condition who also undergo an eye procedure

When an eye procedure is performed during a hospitalization whose principal diagnosis is from another MDC, the case may NOT be in MDC 02 — the MDC follows the principal diagnosis.

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🔢 MDC 02 DRG Table — Surgical

DRG	Description	RW (approx)	Geo Mean LOS
113	Orbital procedures w/ CC/MCC	2.10	5.5
114	Orbital procedures w/o CC/MCC	1.10	2.5
115	Extraocular procedures except orbit w/ CC/MCC	1.85	4.8
116	Extraocular procedures except orbit w/o CC/MCC	0.95	2.2
117	Intraocular procedures w/ CC/MCC	1.60	4.0
118	Intraocular procedures w/o CC/MCC	0.85	1.8

Two-Way Splits in MDC 02

All MDC 02 surgical DRGs use two-way splits (w/ CC/MCC vs w/o). Any single qualifying CC or MCC moves the case to the higher tier. See CC-MCC Reference for designation details.

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🩺 MDC 02 DRG Table — Medical

DRG	Description	RW (approx)	Geo Mean LOS
121	Acute major eye infections w/ CC/MCC	1.40	5.2
122	Acute major eye infections w/o CC/MCC	0.80	3.0
123	Neurological eye disorders	1.10	3.8
124	Other disorders of the eye w/ MCC	1.55	5.5
125	Other disorders of the eye w/ CC	0.90	3.5
126	Other disorders of the eye w/o CC/MCC	0.60	2.2

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⚖️ CC/MCC Drivers — MDC 02

MCCs in Ophthalmology Context

Code	Description	Scenario
A41.9	Sepsis	Endophthalmitis with systemic spread
R65.20	Severe sepsis	Orbital cellulitis → sepsis
J96.01	Acute resp failure w/ hypoxia	Post-op in medically complex patient
N17.9	AKI	Nephrotoxic antifungals (voriconazole) in fungal endophthalmitis
G93.41	Metabolic encephalopathy	AMS in diabetic eye patient
E43	Severe malnutrition	Nutritionally deprived patient with ocular complication
G12.21	ALS	Neurological eye disorder context

CCs in Ophthalmology Context

Code	Description	Scenario
H44.001	Purulent endophthalmitis, unspecified	Intraocular infection — CC when isolated ocular, MCC when systemic
H44.011	Panophthalmitis, right eye	More severe; full globe infection
H59.031	Cataract fragments in vitreous post-procedure	Retained lens fragment — CC
E11.3511	T2DM w/ prolif DR, right, w/ mac edema	Highly specific diabetic eye CC
E11.3512	T2DM w/ prolif DR, left, w/ mac edema
E10.3511	T1DM w/ prolif DR, right, w/ mac edema	Specify T1 vs T2
H40.033x	Angle-closure glaucoma, chronic — see H40.033	Glaucoma CC
H30.101	Unspecified chorioretinal inflammation — see H30.101	Uveitis CC
H33.001	Unspecified retinal detachment w/ retinal break	Surgical DRG driver
S05.61XA	Penetrating wound of orbit with FB	Trauma with orbital foreign body
B02.34	Herpes zoster ocular disease	HZO with keratitis/uveitis
Z79.01	Long-term anticoagulant use	Vitreous hemorrhage; surgical risk
E11.65	T2DM with hyperglycemia	Glucose management during admission
G47.33	OSA	Anesthesia risk for intraocular procedures
A54.33	Gonococcal keratitis	STI-related ocular CC
Z96.1	Presence of intraocular lens	Context for post-cataract complications

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🔪 Key ICD-10-PCS Procedures — Ophthalmology

Orbit / Extraocular

PCS Code	Description	OR?	DRG Pathway
08N00ZZ	Release of right orbit	Yes	DRG 113/114 — Orbital
08Q00ZZ	Repair of right orbit	Yes	DRG 113/114
08R00KZ	Replacement of right orbit, synthetic	Yes	DRG 113/114
08B10ZZ	Excision of right eyelid	Yes	DRG 115/116 — Extraocular
08T10ZZ	Resection of right eyelid	Yes	DRG 115/116
081X0ZZ	Bypass lacrimal duct, right, to nasal cavity	Yes	DCR procedure — DRG 115/116
08C10ZZ	Extirpation of matter, right eyelid	Yes	DRG 115/116

Intraocular

PCS Code	Description	OR?	DRG Pathway
08T10ZZ	Resection of lens, right eye (IOL removal)	Yes	DRG 117/118 — Intraocular
08RJ0JZ	Replacement of right eye lens, synthetic (IOL insertion)	Yes	DRG 117/118
08VF0CZ	Restriction of right vitreous, extraluminal	Yes	DRG 117/118
08C63ZZ	Extirpation, right vitreous, perc (vitrectomy approach)	Yes	DRG 117/118
08150ZZ	Bypass right anterior chamber to sclera	Yes	DRG 117/118 — Trabeculectomy
08H00MZ	Insertion of drainage device, right eye (glaucoma tube-shunt)	Yes	DRG 117/118
08NC0ZZ	Release of right sclera	Yes	DRG 117/118
08QF0ZZ	Repair of right vitreous (gas tamponade/retinal)	Yes	DRG 117/118
087F0ZZ	Dilation of right vitreous	Varies	Verify OR status

Intravitreal Injection Is Non-OR

Intravitreal injection of anti-VEGF agents (bevacizumab, ranibizumab, aflibercept) is a Non-OR procedure at the inpatient level. It does not qualify for a surgical DRG. If the only eye procedure is intravitreal injection, the case stays on the medical DRG pathway.

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🔬 Principal Diagnosis Guide — MDC 02

Clinical Scenario	PDx Code	DRG Pathway
Bacterial endophthalmitis, vitrectomy	H44.001	DRG 121/122 medical; if vitrectomy → 117/118 surgical
Traumatic globe rupture, repair	S05.2X1A	DRG 113/114 or 115/116 depending on extent
Orbital cellulitis with abscess	H05.019	DRG 121/122 — acute major eye infection
Tractional retinal detachment, vitrectomy	H33.40x	DRG 117/118 — intraocular
Rhegmatogenous retinal detachment, scleral buckle	H33.001	DRG 117/118 — intraocular
Glaucoma, acute angle-closure	H40.211x	DRG 124/125/126 — other disorders of eye
Optic neuritis	H46.10	DRG 123 — neurological eye disorders
Diplopia, 3rd nerve palsy	H49.00	DRG 123 — neurological eye
Retained intraocular foreign body	H44.60x	DRG 117/118 if removed surgically
Post-cataract IOL dislocation	H27.119	DRG 117/118 if repositioned/replaced
Herpes zoster ophthalmicus	B02.34	DRG 121/122 — acute major infection

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🧪 Key Sequencing Pitfalls — MDC 02

Pitfall 1: Eye Procedure in a Non-Eye Admission

Scenario: Patient admitted for sepsis from endocarditis. Ophthalmology performs vitrectomy for endogenous endophthalmitis during the same admission.

❌ Wrong: Code H44.001 as PDx → MDC 02 ✅ Correct: PDx is sepsis → MDC 18. Eye procedure is coded but does not change the MDC. Endophthalmitis is a secondary diagnosis, not the reason for admission.

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Pitfall 2: Diabetic Retinopathy Specificity Loss

Scenario: T2DM patient with proliferative diabetic retinopathy, vitrectomy performed, right eye, with macular edema noted in op note.

❌ Wrong: E11.39 — T2DM with other diabetic ophthalmic complication (unspecified) ✅ Correct: E11.3511 — T2DM with proliferative diabetic retinopathy with macular edema, right eye — CC with far greater clinical specificity

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Pitfall 3: Endophthalmitis Severity Not Escalated

Scenario: Vitreous culture positive for S. aureus post-cataract surgery. Patient febrile, bacteremic.

❌ Wrong: Code only H44.001 purulent endophthalmitis ✅ Correct: Query for sepsis — A41.01 (MSSA sepsis) or A41.02 (MRSA) becomes PDx; endophthalmitis is source. MCC tier secured.

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Pitfall 4: Laterality Missing on Eye Codes

Scenario: Coder uses H44.009 (endophthalmitis, unspecified eye) when op report clearly documents right eye.

✅ Correct: H44.001 right eye — specificity matters for quality metrics, bilateral flag, and clinical accuracy even when DRG is unaffected.

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📋 Coding Scenarios

Scenario 1: Endogenous Endophthalmitis, IV Drug Use

Admit: 34M, IVDU, fever, right eye pain and vision loss. Vitreous tap + vitrectomy performed. Blood cultures → MRSA.

Code	Type	Notes
A41.02	PDx	Sepsis due to MRSA — systemic; query confirmed
H44.001	SDx	Purulent endophthalmitis right eye — source
F11.20	SDx	Opioid use disorder, uncomplicated — CC
08C63ZZ	Proc	Vitrectomy (extirpation of vitreous, right, percutaneous)

DRG: MDC 18 sepsis DRG (not MDC 02) — PDx of sepsis exits eye MDC. Without sepsis query: Would be DRG 117 (intraocular w/ CC/MCC) — lower RW.

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Scenario 2: Tractional Retinal Detachment, Diabetic

Admit: 59F, T2DM, tractional retinal detachment left eye. Vitrectomy, membrane peel, silicone oil tamponade. Comorbidities: T2DM E11.3512 (prolif DR w/ mac edema, left, already established as PDx context), CKD 3a N18.31, HTN I10.

Code	Type	Notes
H33.40x	PDx	Traction detachment of retina (left — add laterality)
E11.3512	SDx	T2DM w/ prolif DR, left, w/ mac edema — CC
N18.31	SDx	CKD Stage 3a — CC
I10	SDx	HTN — CC (if managed)
08QF0ZZ	Proc	Repair of vitreous, right (confirm laterality in PCS)

DRG: 117 — Intraocular procedures w/ CC/MCC No MCC present — multiple CCs cap at CC tier (DRG 117). CDI opportunity: check post-op creatinine with nephrotoxic eye drops or IV contrast.

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🩺 CDI Opportunities — MDC 02

Clinical Finding	Query Target	Impact
Bacteremia / systemic signs with endophthalmitis	Sepsis A41.xx	MCC; may exit MDC 02 entirely
Post-op creatinine rise / nephrotoxic drops	AKI N17.9	MCC
Vague “diabetic retinopathy” documentation	DR type + laterality + mac edema status	CC specificity
Orbital cellulitis spreading toward cavernous sinus	Sepsis query	MCC
Antifungal therapy (amphotericin, voriconazole)	Fungal organism confirmation	Specificity
Albumin low in elderly ophthalmic patient	Malnutrition E43/E44.0	MCC/CC

See CDI Query Templates for query language.

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🔗 Related Notes

• MS-DRG_Overview
• CC-MCC Reference
• CDI Query Templates
• MDC 03 - ENT
• POA_Indicator_Guide
• H40.033
• H30.101