G31.89
BillableOther specified degenerative diseases of nervous system
HCC Category Mapping
RxHCCHCC 112 — Dementia and Other Specified Brain Disorders
0.000What This Code Means
This code represents other specified degenerative diseases of the nervous system not classified elsewhere, including various progressive neurological conditions affecting the brain and spinal cord.
Coding Tips
- •Use this code only when a specific degenerative neurological disease code is not available; always document the specific condition
- •Review documentation carefully to ensure a more specific G31 code is not applicable before assigning this catch-all code
Clinical Significance
Other specified degenerative diseases of the nervous system captures progressive neurological conditions that have been identified by the provider but do not have their own specific ICD-10 code. This code serves as a catch-all for rare or unusual degenerative conditions while still indicating that a specific diagnosis has been made. It is important for capturing complex neurological comorbidities.
Documentation Requirements
- ✓Documentation specifying the exact degenerative neurological condition
- ✓Clinical evidence supporting the degenerative nature of the disease
- ✓Evidence that more specific codes (G31.01-G31.86) have been considered and are not applicable
- ✓Neurological examination and/or neuroimaging findings
- ✓Treatment plan for the specific condition documented
Commonly Confused Codes
G31.9 — Degenerative disease of nervous system, unspecified; use when the specific condition cannot be identified at allG31.83 — Neurocognitive disorder with Lewy bodies; should be used instead if Lewy body disease is documentedG31.85 — Corticobasal degeneration; has its own specific codeG31.86 — Alexander disease; has its own specific codeG31.01 — Pick's disease; has its own specific code
Code Hierarchy
└G31Other degenerative diseases of nervous system, not elsewhere classified└G31.8Other specified degenerative diseases of nervous system└G31.89Other specified degenerative diseases of nervous system
└G31.89Other specified degenerative diseases of nervous system