2027 ICD-10-CM Diagnosis Code G97.81Other intraoperative complications of nervous system

ICD-10-CM Codes›G00–G99›G89-G99›G97

ICD-10-CM G97.81
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G97.81 is a billable ICD-10-CM diagnosis code for other intraoperative complications of nervous system. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 91 through 93, 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 60 closely related codes. Coders also document this condition as accidental damage of nervous system implant during surgery. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative nervous system complication.

Code Identity

ICD-10-CM Code
G97.81
Billable Status
Yes — Valid for Submission
Code Describes
Other intraoperative complications of nervous system
Short Description
Other intraoperative complications of nervous system
Same as the full description in the CMS dataset.
Parent Code
G97.8
Other intraoperative and postprocedural complications and disorders of nervous system

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG97Intraoperative and postprocedural complications and disorders of nervous system, not elsewhere classified
This CodeG97.81Other intraoperative complications of nervous system

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Accidental damage of nervous system implant during surgery
  • Injury to nerve during surgery
  • Traumatic injury to peripheral nerve during surgery

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G97.81: its own notes plus those printed at G97.8, G97, and Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From G97 Intraoperative and postprocedural complications and disorders of nervous system, not elsewhere classified applies to 18 codes
  • intraoperative and postprocedural cerebrovascular infarction (I97.81-, I97.82-)
From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • 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)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From G97.8 Other intraoperative and postprocedural complications and disorders of nervous system applies to 4 codes
  • code to further specify disorder

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS021
Postprocedural or postoperative nervous system complication
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert G97.81 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
997.01 Surg complication - cns
Approximate The match is approximate rather than exact.
ICD-9-CM
997.09 Surg comp nerv systm NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G97.81Overview

What is the ICD-10 code for other intraoperative complications of nervous system?

The ICD-10-CM code for other intraoperative complications of nervous system is G97.81 (sometimes written as G9781). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is G97.81 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other intraoperative complications of nervous system on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does G97.81 group to?

When other intraoperative complications of nervous system is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 91, 92, 93, with relative weights from 0.7783 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.

Is G97.81 a CC or MCC?

CMS lists G97.81 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 60 closely related codes in its exclusion list.

Does G97.81 need an additional code?

When the condition applies, yes. The Use Additional Code note at G97.8, which applies to G97.81, reads: code to further specify disorder. The additional code is reported after G97.81.