2027 ICD-10-CM Diagnosis Code G97.31Intraoperative hemorrhage and hematoma of a nervous system organ or structure complicating a nervous system procedure
ICD-10-CM Codes›G00–G99›G89-G99›G97
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
G97.31 is a billable ICD-10-CM diagnosis code for intraoperative hemorrhage and hematoma of a nervous system organ or structure complicating a nervous system procedure. 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. 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 28 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative nervous system complication.
Code Identity
Code Classification
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G97.31: its own notes plus those printed at G97.3, G97, and Chapter 6. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
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.
- 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)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name G97.31, its category, or a range that includes it.
Excludes2 3
These codes carry an Excludes2 note naming G97.31: its condition is not part of those codes, and both may be reported when the patient has both.
- I97.4 Intraoperative hemorrhage and hematoma of a circulatory system organ or structure complicating a procedureintraoperative cerebrovascular hemorrhage complicating a procedure (G97.3-) names G97.3-, which includes this code
- Block T80-T88 Complications of surgical and medical care, not elsewhere classifiedintraoperative and postprocedural complications of specified body systems (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95.6-, J95.7, K91.6-, L76.-, M96.-, N99.-) names G97.3-, which includes this code
- T81 Complications of procedures, not elsewhere classifiedintraoperative and postprocedural complications of specific body system (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95, K91.-, L76.-, M96.-, N99.-) names G97.3-, which includes this code
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.
Convert G97.31 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G97.31Overview
Is G97.31 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report intraoperative hemorrhage and hematoma of a nervous system organ or structure complicating a nervous system procedure on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does G97.31 group to?
When intraoperative hemorrhage and hematoma of a nervous system organ or structure complicating a nervous system procedure is the principal diagnosis on an inpatient stay, it groups to MS-DRG 91, 92, 93, with relative weights from 0.7783 to 1.7050 depending on complications. Higher weights mean higher Medicare reimbursement.
Is G97.31 a CC or MCC?
CMS lists G97.31 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 28 closely related codes in its exclusion list.
Can G97.31 be reported with a code from G97.4?
Not as a rule. The Excludes1 note at G97.3, which applies to G97.31, lists "intraoperative hemorrhage and hematoma of a nervous system organ or structure due to accidental puncture and laceration during a procedure (G97.4-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of G97.31?
Under the General Equivalence Mappings, intraoperative hemorrhage and hematoma of a nervous system organ or structure complicating a nervous system procedure converts to ICD-9-CM 997.02 (iatrogen CV infarc/hmrhg), 998.11 (hemorrhage complic proc), and 998.12 (hematoma complic proc). The mapping is approximate, so confirm the match fits the documentation.
