A18.51 — Tuberculous episcleritis
A18.51 is a billable, specific ICD-10-CM code for tuberculous episcleritis. It is valid for submission on a claim.
Risk adjustment
A18.51 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
A18.51 is named in 18 Medicare coverage policies — 18 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A53060Billing and Coding: Ophthalmology: Extended Ophthalmoscopy and Fundus Photography
- A56416Billing and Coding: Assays for Vitamins and Metabolic Function
- A56726Billing and Coding: Ophthalmology: Posterior Segment Imaging (Extended Ophthalmoscopy and Fundus Photography)
- A56729Billing and Coding: Magnetic Resonance Imaging of the Head and Neck
How A18.51 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to A18.51.
- Episcleritis›tuberculous
- Scleritis›tuberculous(nodular)
- Tuberculosis, tubercular, tuberculous›episcleritis
- Tuberculosis, tubercular, tuberculous›sclera
- Episcleritis›in›tuberculosis
Related codes at this level
Codes that share A18.5. If A18.51 is not quite right, the correct code is usually one of these.
Questions about A18.51
- Is A18.51 a billable ICD-10-CM code?
- Yes. A18.51 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does A18.51 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Tuberculosis (A15-A19).