ICD-10-CM 2027
ICD-10 code for central nervous system deficiency
From the official ICD-10-CM alphabetic index entry “Deficiency, deficient › central nervous system”. Page updated September 29, 2026.
About coding central nervous system deficiency
The ICD-10-CM code for central nervous system deficiency is G96.89 (Other specified disorders of central nervous system).
Within G96.8, choose G96.89 (Other specified disorders of central nervous system) only when documentation doesn't support a more specific option: intracranial hypotension (G96.81).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 070 (Other Cerebrovascular Disorders with MCC, relative weight 1.6093), DRG 071 (Other Cerebrovascular Disorders with CC, relative weight 1.0177) and DRG 072 (Other Cerebrovascular Disorders without CC/MCC, relative weight 0.7348), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about central nervous system deficiency ICD-10 codes
What is the ICD-10 code for central nervous system deficiency?
- G96.89 — Other specified disorders of central nervous system.
Is G96.89 billable?
- Yes. G96.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G96.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G96.89 as a principal diagnosis.
Is G96.89 a CC or MCC?
- No. G96.89 is neither a CC nor an MCC under MS-DRG v44.0.