E79.1 — Lesch-Nyhan syndrome
E79.1 is a billable, specific ICD-10-CM code for lesch-nyhan syndrome. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- HGPRT deficiency
Other codes that can never be billed with E79.1
These codes carry an Excludes1 note pointing at E79.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading E79.1 alone.
- D53.0Protein deficiency anemia
Risk adjustment
E79.1 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 50 Amyloidosis, Porphyria, and Other Specified Metabolic Disorders0.648 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
How E79.1 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 E79.1.
- Lesch-Nyhan syndrome
- Deficiency, deficient›hypoxanthine-(guanine)-phosphoribosyltransferase (HG- PRT) (total H-PRT)
- Arthropathy›gouty›in›Lesch-Nyhan syndrome
Related codes at this level
Codes that share E79. If E79.1 is not quite right, the correct code is usually one of these.
Questions about E79.1
- Is E79.1 a billable ICD-10-CM code?
- Yes. E79.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does E79.1 sit in the tabular list?
- Endocrine, nutritional and metabolic diseases (E00-E89), in the block Metabolic disorders (E70-E88).