Is E23.3 a billable ICD-10-CM code?

Yes. E23.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does E23.3 sit in the tabular list?

Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of other endocrine glands (E20-E35).

What cannot be coded together with E23.3?

E23.3 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 E23.3 (E23) and apply to it just the same.

E23.3

E23.3 — Hypothalamic dysfunction, not elsewhere classified

Billable / specific codeICD-10-CM

E23.3 is a billable, specific ICD-10-CM code for hypothalamic dysfunction, not elsewhere classified. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

Prader-Willi syndrome (Q87.11)
Russell-Silver syndrome (Q87.19)

Excludes1 inherited from the categories above E23.3

These are not written on E23.3, but they bind it: a note on a category applies to every code beneath it. Billing E23.3 with anything listed here is a denial.

Written on E23 — Hypofunction and other disorders of the pituitary gland

postprocedural hypopituitarism (E89.3)
short stature due to endocrine disorder (E34.3-)

Risk adjustment

E23.3 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

E23.3 is named in 7 Medicare coverage policies — 7 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56551Billing and Coding: Visual Fields Testing
A56612Billing and Coding: CT of the Head
A56799Billing and Coding: Visual Fields Testing
A57204Billing and Coding: MRI and CT Scans of the Head and Neck

How E23.3 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 E23.3.

Dyspituitarism
Renon-Delille syndrome
Disorder›neurohypophysis NEC
Dysfunction›hypothalamic NEC
Dysfunction›pituitary(gland)
Overactive›hypothalamus

Code history

E23.3 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 E23. If E23.3 is not quite right, the correct code is usually one of these.

Questions about E23.3

Is E23.3 a billable ICD-10-CM code?: Yes. E23.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does E23.3 sit in the tabular list?: Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of other endocrine glands (E20-E35).
What cannot be coded together with E23.3?: E23.3 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 E23.3 (E23) and apply to it just the same.