E73.8 — Other lactose intolerance
E73.8 is a billable, specific ICD-10-CM code for other lactose intolerance. It is valid for submission on a claim.
Other codes that can never be billed with E73.8
These codes carry an Excludes1 note pointing at E73.8. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading E73.8 alone.
- Z91.011Allergy to milk products
Risk adjustment
E73.8 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.
How E73.8 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 E73.8.
- Intolerance›lactose›specified NEC
Code history
E73.8 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 E73. If E73.8 is not quite right, the correct code is usually one of these.
Questions about E73.8
- Is E73.8 a billable ICD-10-CM code?
- Yes. E73.8 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does E73.8 sit in the tabular list?
- Endocrine, nutritional and metabolic diseases (E00-E89), in the block Metabolic disorders (E70-E88).