2027 ICD-10-CM Diagnosis Code G97.63Postprocedural seroma of a nervous system organ or structure following a nervous system procedure

ICD-10-CM Codes›G00–G99›G89-G99›G97

ICD-10-CM G97.63
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G97.63 is a billable ICD-10-CM diagnosis code for postprocedural seroma of a nervous system organ or structure following 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 919 through 921. 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 74 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative nervous system complication.

Code Identity

ICD-10-CM Code
G97.63
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural seroma of a nervous system organ or structure following a nervous system procedure
Short Description
Postproc seroma of a nervous sys org fol a nervous sys proc
Parent Code
G97.6
Postprocedural hematoma and seroma of a nervous system organ or structure following a procedure

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 CodeG97.63Postprocedural seroma of a nervous system organ or structure following a nervous system procedure

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G97.63: its own notes plus those printed at 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)

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 G97.63 to ICD-9-CMHistory

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

ICD-9-CM
998.13 Seroma complicting proc
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement G97.63 replaces the following previously assigned code(s):

  • G97.51 - Postproc hemor of a nervous sys org fol a nervous sys proc
  • G97.51 - Postproc hemor/hemtom of a nrv sys org fol a nrv sys proc
FY 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G97.63Overview

Is G97.63 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report postprocedural seroma of a nervous system organ or structure following a nervous system procedure on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does G97.63 group to?

When postprocedural seroma of a nervous system organ or structure following a nervous system procedure is the principal diagnosis on an inpatient stay, it groups to MS-DRG 920, 919, 921, with relative weights from 0.6719 to 1.7624 depending on complications. Higher weights mean higher Medicare reimbursement.

Is G97.63 a CC or MCC?

CMS lists G97.63 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 74 closely related codes in its exclusion list.

What is the ICD-9 equivalent of G97.63?

Under the General Equivalence Mappings, postprocedural seroma of a nervous system organ or structure following a nervous system procedure converts to ICD-9-CM 998.13 (seroma complicting proc). The mapping is approximate, so confirm the match fits the documentation.