Is E88.9 a billable ICD-10-CM code?

Yes. E88.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does E88.9 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 E88.9?

E88.9 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 E88.9 (E88) and apply to it just the same.

E88.9

E88.9 — Metabolic disorder, unspecified

Billable / specific codeICD-10-CM

E88.9 is a billable, specific ICD-10-CM code for metabolic disorder, unspecified. It is valid for submission on a claim.

Excludes1 inherited from the categories above E88.9

These are not written on E88.9, but they bind it: a note on a category applies to every code beneath it. Billing E88.9 with anything listed here is a denial.

Written on E88 — Other and unspecified metabolic disorders

histiocytosis X (chronic) (C96.6)

Risk adjustment

E88.9 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

E88.9 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.

A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
A56500Billing and Coding: Cardiac Catheterization and Coronary Angiography

How E88.9 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 E88.9.

Cardiomyopathy›metabolic
Complication›metabolic
Disease, diseased›metabolic, metabolism
Disorder›metabolism NOS
Disturbance›metabolism
Arthritis, arthritic›in›metabolic disorder NEC
Arthropathy›in›metabolic disease NOS
Cataract›in›metabolic disease
Disease, diseased›skin›due to metabolic disorder NEC
Disorder›metabolism NOS›congenital
Disturbance›metabolism›general
Glaucoma›in›metabolic disease NOS

Code history

E88.9 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 E88. If E88.9 is not quite right, the correct code is usually one of these.

Questions about E88.9

Is E88.9 a billable ICD-10-CM code?: Yes. E88.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does E88.9 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 E88.9?: E88.9 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 E88.9 (E88) and apply to it just the same.