E70.20 — Disorder of tyrosine metabolism, unspecified
E70.20 is a billable, specific ICD-10-CM code for disorder of tyrosine metabolism, unspecified. It is valid for submission on a claim.
Excludes1 inherited from the categories above E70.20
These are not written on E70.20, but they bind it: a note on a category applies to every code beneath it. Billing E70.20 with anything listed here is a denial.
Other codes that can never be billed with E70.20
These codes carry an Excludes1 note pointing at E70.20. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading E70.20 alone.
- E72Other disorders of amino-acid metabolism
Risk adjustment
E70.20 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
E70.20 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A57071Billing and Coding: Ophthalmology: Posterior Segment Imaging (Extended Ophthalmoscopy and Fundus Photography)
How E70.20 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 E70.20.
- Disturbance›metabolism›tyrosine
- Disorder›metabolism NOS›amino-acid›aromatic›tyrosine
Code history
E70.20 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 E70.2. If E70.20 is not quite right, the correct code is usually one of these.
Questions about E70.20
- Is E70.20 a billable ICD-10-CM code?
- Yes. E70.20 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does E70.20 sit in the tabular list?
- Endocrine, nutritional and metabolic diseases (E00-E89), in the block Metabolic disorders (E70-E88).
- What cannot be coded together with E70.20?
- E70.20 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 E70.20 (E70.2) and apply to it just the same.