G13.8 — Systemic atrophy primarily affecting central nervous system in other diseases classified elsewhere
Is G13.8 billable?
Yes — G13.8 is billable for FY2027. G13.8 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. G13.8 may be submitted for encounters from October 1, 2026 through September 30, 2027.
G13.8 at a glance
| Code | G13.8 |
|---|---|
| Description | Systemic atrophy primarily affecting central nervous system in other diseases classified elsewhere |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to G13.8?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name G13.8 directly.
This code describes a manifestation of an underlying disease. The underlying condition must be sequenced before it, so it can never be the principal or first-listed diagnosis.
Which MS-DRGs does G13.8 group to?
G13.8 sits in MDC 01 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 056Degenerative Nervous System Disorders with MCCmedical
- 057Degenerative Nervous System Disorders without MCCmedical
How is G13.8 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to G13.8. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Atrophy, atrophic › systemic affecting central nervous system › in › specified disease NEC (of)
Code first
The underlying condition below must be sequenced before G13.8. G13.8 describes a manifestation and cannot be the principal or first-listed diagnosis.
- underlying disease
Excludes2 — not included here — inherited from Chapter 6
The conditions below are not part of G13.8, but a patient may have both at the same time. When documentation supports it, G13.8 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
How long has G13.8 existed?
G13.8 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.