H49.13
H49.13 — Fourth [trochlear] nerve palsy, bilateral
Billable / specific codeICD-10-CMbilateral
H49.13 is a billable, specific ICD-10-CM code for fourth [trochlear] nerve palsy, bilateral. It is valid for submission on a claim.
Risk adjustment
H49.13 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
H49.13 is named in 35 Medicare coverage policies — 35 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A54095Billing and Coding: Nerve Conduction Studies and Electromyography
- A54095Billing and Coding: Nerve Conduction Studies and Electromyography
- A54969Billing and Coding: Nerve Conduction Studies and Electromyography
- A56551Billing and Coding: Visual Fields Testing
Related codes at this level
Codes that share H49.1. If H49.13 is not quite right, the correct code is usually one of these.
Questions about H49.13
- Is H49.13 a billable ICD-10-CM code?
- Yes. H49.13 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does H49.13 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).