ICD-10-CM 2027
ICD-10 code for nervous system complication
From the official ICD-10-CM alphabetic index entry “Complication (s) (from) (of) › nervous system”. Page updated September 29, 2026.
About coding nervous system complication
The ICD-10-CM code for nervous system complication is G98.8 (Other disorders of nervous system). The official index lists 16 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G98.8.
Within G98, choose G98.8 (Other disorders of nervous system) only when documentation doesn't support a more specific option: neurogenic arthritis, not elsewhere classified (G98.0).
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), DRG 072 (Other Cerebrovascular Disorders without CC/MCC, relative weight 0.7348), DRG 974 (HIV with Major Related Condition with MCC, relative weight 3.0506), DRG 975 (HIV with Major Related Condition with CC, relative weight 1.3252) and DRG 976 (HIV with Major Related Condition without CC/MCC, relative weight 0.8124), in MDC 01 (Diseases and Disorders of the Nervous System) and MDC 25 (Human Immunodeficiency Virus Infections), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific nervous system complication codes (official index)
- central G96.9 — Disorder of central nervous system, unspecified
- device, implant or graft
- electronic stimulator (electrode(s))
- specified NEC
- infection and inflammation T85.738 — Infection and inflammatory reaction due to other nervous system device, implant or graft
- mechanical T85.695 — Other mechanical complication of other nervous system device, implant or graft
- breakdown T85.615 — Breakdown (mechanical) of other nervous system device, implant or graft
- displacement T85.625 — Displacement of other nervous system device, implant or graft
- leakage T85.635 — Leakage of other nervous system device, implant or graft
- malfunction T85.695 — Other mechanical complication of other nervous system device, implant or graft
- malposition T85.625 — Displacement of other nervous system device, implant or graft
- obstruction T85.695 — Other mechanical complication of other nervous system device, implant or graft
- perforation T85.695 — Other mechanical complication of other nervous system device, implant or graft
- protrusion T85.695 — Other mechanical complication of other nervous system device, implant or graft
- specified NEC T85.695 — Other mechanical complication of other nervous system device, implant or graft
- ventricular shunt
- electronic stimulator (electrode(s))
- postprocedural G97.82 — Other postprocedural complications and disorders of nervous system
- intracranial hypotension G97.2 — Intracranial hypotension following ventricular shunting
- specified NEC G97.82 — Other postprocedural complications and disorders of nervous system
- spinal fluid leak G97.0 — Cerebrospinal fluid leak from spinal puncture
Common questions about nervous system complication ICD-10 codes
What is the ICD-10 code for nervous system complication?
- G98.8 — Other disorders of nervous system. More specific codes apply when the documentation supports them: G96.9, T85.738, T85.695, T85.615 and others below.
What is the ICD-10 code for central nervous system complication?
- G96.9 — Disorder of central nervous system, unspecified.
What is the ICD-10 code for postprocedural nervous system complication?
- G97.82 — Other postprocedural complications and disorders of nervous system.
Is G98.8 billable?
- Yes. G98.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G98.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G98.8 as a principal diagnosis.
Is G98.8 a CC or MCC?
- No. G98.8 is neither a CC nor an MCC under MS-DRG v44.0.