Is H50.18 a billable ICD-10-CM code?

Yes. H50.18 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does H50.18 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).

What cannot be coded together with H50.18?

H50.18 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above H50.18 (H50.1) and apply to it just the same.

H50.18

H50.18 — Alternating exotropia with other noncomitancies

Billable / specific codeICD-10-CM

H50.18 is a billable, specific ICD-10-CM code for alternating exotropia with other noncomitancies. It is valid for submission on a claim.

Excludes1 inherited from the categories above H50.18

These are not written on H50.18, but they bind it: a note on a category applies to every code beneath it. Billing H50.18 with anything listed here is a denial.

Written on H50.1 — Exotropia

intermittent exotropia (H50.33-, H50.34)

Risk adjustment

H50.18 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

H50.18 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.

A54095Billing and Coding: Nerve Conduction Studies and Electromyography
A54969Billing and Coding: Nerve Conduction Studies and Electromyography
A56619Billing and Coding: Nerve Conduction Studies and Electromyography
A57123Billing and Coding: Nerve Conduction Studies and Electromyography

How H50.18 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 H50.18.

Strabismus›divergent concomitant›alternating›with›specified noncomitances NEC

Code history

H50.18 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share H50.1. If H50.18 is not quite right, the correct code is usually one of these.

Questions about H50.18

Is H50.18 a billable ICD-10-CM code?: Yes. H50.18 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does H50.18 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).
What cannot be coded together with H50.18?: H50.18 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above H50.18 (H50.1) and apply to it just the same.