E24.3 — Ectopic ACTH syndrome
Is E24.3 billable?
Yes — E24.3 is billable for FY2027. E24.3 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. E24.3 may be submitted for encounters from October 1, 2026 through September 30, 2027.
E24.3 at a glance
| Code | E24.3 |
|---|---|
| Description | Ectopic ACTH syndrome |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does E24.3 group to?
E24.3 sits in MDC 10 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 643Endocrine Disorders with MCCmedical
- 644Endocrine Disorders with CCmedical
- 645Endocrine Disorders without CC/MCCmedical
As a secondary diagnosis, E24.3 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is E24.3 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to E24.3. They show the wording a clinician may have documented, which often differs from the Tabular description.
- ACTH ectopic syndrome
- Ectopic, ectopia › ACTH syndrome (congenital)
- Syndrome › ectopic ACTH
- Syndrome › Cushing's › due to › ectopic ACTH
Excludes1 — never code together — inherited from Chapter 4
The conditions below can never be reported together with E24.3 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- transitory endocrine and metabolic disorders specific to newborn (P70-P74)
Excludes1 — never code together — inherited from E20-E35
The conditions below can never be reported together with E24.3 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from E24
The conditions below can never be reported together with E24.3 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- congenital adrenal hyperplasia (E25.0)
How long has E24.3 existed?
E24.3 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with E24.3?
ICD-10-CM declares these codes mutually exclusive with E24.3 — exactly one of each pair can be correct for a given encounter.