Is H00.021 a billable ICD-10-CM code?

Yes. H00.021 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does H00.021 sit in the tabular list?

Diseases of the eye and adnexa (H00-H59), in the block Disorders of eyelid, lacrimal system and orbit (H00-H05).

H00.021

H00.021 — Hordeolum internum right upper eyelid

Billable / specific codeICD-10-CMright

H00.021 is a billable, specific ICD-10-CM code for hordeolum internum right upper eyelid. It is valid for submission on a claim.

Risk adjustment

H00.021 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

H00.021 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A57068Billing and Coding: Ocular Photography - External
A57637Billing and Coding: Visual Field Examination

How H00.021 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 H00.021.

Hordeolum›internum›right›upper

Related codes at this level

Codes that share H00.02. If H00.021 is not quite right, the correct code is usually one of these.

Questions about H00.021

Is H00.021 a billable ICD-10-CM code?: Yes. H00.021 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does H00.021 sit in the tabular list?: Diseases of the eye and adnexa (H00-H59), in the block Disorders of eyelid, lacrimal system and orbit (H00-H05).