H51.21
H51.21 — Internuclear ophthalmoplegia, right eye
Billable / specific codeICD-10-CMright
H51.21 is a billable, specific ICD-10-CM code for internuclear ophthalmoplegia, right eye. It is valid for submission on a claim.
Risk adjustment
H51.21 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
H51.21 is named in 23 Medicare coverage policies — 23 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A54969Billing and Coding: Nerve Conduction Studies and Electromyography
- A56551Billing and Coding: Visual Fields Testing
- A56612Billing and Coding: CT of the Head
- A56619Billing and Coding: Nerve Conduction Studies and Electromyography
Related codes at this level
Codes that share H51.2. If H51.21 is not quite right, the correct code is usually one of these.
Questions about H51.21
- Is H51.21 a billable ICD-10-CM code?
- Yes. H51.21 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does H51.21 sit in the tabular list?
- Diseases of the eye and adnexa (H00-H59), in the block Disorders of ocular muscles, binocular movement, accommodation and refraction (H49-H52).