H10.45 — Other chronic allergic conjunctivitis
H10.45 is a billable, specific ICD-10-CM code for other chronic allergic conjunctivitis. It is valid for submission on a claim.
Risk adjustment
H10.45 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
H10.45 is named in 24 Medicare coverage policies — 24 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56538Billing and Coding: Allergen Immunotherapy
- A56558Billing and Coding: Allergy Testing
- A56559Billing and Coding: Allergy Skin Testing
- A56559Billing and Coding: Allergy Skin Testing
How H10.45 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 H10.45.
- Conjunctivitis NOS›allergic›chronic
- Conjunctivitis NOS›chronic›allergic
Related codes at this level
Codes that share H10.4. If H10.45 is not quite right, the correct code is usually one of these.
Questions about H10.45
- Is H10.45 a billable ICD-10-CM code?
- Yes. H10.45 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does H10.45 sit in the tabular list?
- Diseases of the eye and adnexa (H00-H59), in the block Disorders of conjunctiva (H10-H11).