G23.0 — Hallervorden-Spatz disease
Is G23.0 billable?
Yes — G23.0 is billable for FY2027. G23.0 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. G23.0 may be submitted for encounters from October 1, 2026 through September 30, 2027.
G23.0 at a glance
| Code | G23.0 |
|---|---|
| Description | Hallervorden-Spatz disease |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does G23.0 group to?
G23.0 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
As a secondary diagnosis, G23.0 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is G23.0 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to G23.0. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Hallervorden-Spatz disease
- Degeneration, degenerative › pallidal pigmentary
- Syndrome › pigmentary pallidal degeneration
- Degeneration, degenerative › pigmentary › pallidal
Inclusion terms
Alternative wording in documentation that is classified to G23.0.
- Pigmentary pallidal degeneration
Excludes2 — not included here — inherited from Chapter 6
The conditions below are not part of G23.0, but a patient may have both at the same time. When documentation supports it, G23.0 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)
Excludes2 — not included here — inherited from G23
The conditions below are not part of G23.0, but a patient may have both at the same time. When documentation supports it, G23.0 and the excluded code may both be reported.
- multi-system degeneration of the autonomic nervous system (G90.3)
How long has G23.0 existed?
G23.0 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.