G13 — Systemic atrophies primarily affecting central nervous system in diseases classified elsewhere
Not billable
Is G13 billable?
No — G13 is a non-billable header code. G13 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 4 billable codes beneath G13.
Billable codes under this header
- G13.0Paraneoplastic neuromyopathy and neuropathy
- G13.1Other systemic atrophy primarily affecting central nervous system in neoplastic disease
- G13.2Systemic atrophy primarily affecting the central nervous system in myxedema
- G13.8Systemic atrophy primarily affecting central nervous system in other diseases classified elsewhere
G13 at a glance
| Code | G13 |
|---|---|
| Description | Systemic atrophies primarily affecting central nervous system in diseases classified elsewhere |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes2 — not included here — inherited from Chapter 6
The conditions below are not part of G13, but a patient may have both at the same time. When documentation supports it, G13 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)
What codes fall under G13? (4)
- G13.0Paraneoplastic neuromyopathy and neuropathy
- G13.1Other systemic atrophy primarily affecting central nervous system in neoplastic disease
- G13.2Systemic atrophy primarily affecting the central nervous system in myxedema
- G13.8Systemic atrophy primarily affecting central nervous system in other diseases classified elsewhere
How long has G13 existed?
G13 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.