2027 ICD-10-CM Diagnosis Code M96.840Postprocedural hematoma of a musculoskeletal structure following a musculoskeletal system procedure

ICD-10-CM Codes›M00–M99›M96›M96

ICD-10-CM M96.840
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M96.840 is a billable ICD-10-CM diagnosis code for postprocedural hematoma of a musculoskeletal structure following a musculoskeletal 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 76 closely related codes. Coders also document this condition as hematoma due to and following hip arthroplasty. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative musculoskeletal system complication.

Code Identity

ICD-10-CM Code
M96.840
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural hematoma of a musculoskeletal structure following a musculoskeletal system procedure
Short Description
Postproc hematoma of a ms structure fol a ms sys procedure
Parent Code
M96.84
Postprocedural hematoma and seroma of a musculoskeletal structure following a procedure

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM96Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified
CategoryM96Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified
This CodeM96.840Postprocedural hematoma of a musculoskeletal structure following a musculoskeletal system procedure

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Hematoma due to and following hip arthroplasty
  • Hematoma due to and following knee arthroplasty
  • Hematoma due to and following left hip arthroplasty
  • Hematoma due to and following left knee arthroplasty
  • Hematoma due to and following right hip arthroplasty
  • Hematoma due to and following right knee arthroplasty
  • Hematoma of left hip region
  • Hematoma of left knee region
  • Hematoma of right hip region
  • Hematoma of right knee region

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M96.840: its own notes plus those printed at M96 and Chapter 13. 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 M96 Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified applies to 36 codes
  • arthropathy following intestinal bypass (M02.0-)
  • complications of internal orthopedic prosthetic devices, implants and grafts (T84.-)
  • disorders associated with osteoporosis (M80)
  • periprosthetic fracture around internal prosthetic joint (M97.-)
  • presence of functional implants and other devices (Z96-Z97)
From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • 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)

Notes

General instructions on how these codes are used.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name M96.840, its category, or a range that includes it.

Excludes1 4

These codes carry an Excludes1 note naming M96.840: they are not reported together with it, unless the two conditions are unrelated.

  • M25.3 Other instability of joint
    instability of joint secondary to removal of joint prosthesis (M96.8-) names M96.8-, which includes this code
  • M40 Kyphosis and lordosis
    postprocedural kyphosis and lordosis (M96.-) names M96.-, which includes this code
  • Block M86-M90 Other osteopathies
    postprocedural osteopathies (M96.-) names M96.-, which includes this code
  • Block M91-M94 Chondropathies
    postprocedural chondropathies (M96.-) names M96.-, which includes this code

Excludes2 3

These codes carry an Excludes2 note naming M96.840: its condition is not part of those codes, and both may be reported when the patient has both.

  • M95 Other acquired deformities of musculoskeletal system and connective tissue
    postprocedural musculoskeletal disorders (M96.-) names M96.-, which includes this code
  • Block T80-T88 Complications of surgical and medical care, not elsewhere classified
    intraoperative 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 M96.-, which includes this code
  • T81 Complications of procedures, not elsewhere classified
    intraoperative 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 M96.-, 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.

CCSR MUS037
Postprocedural or postoperative musculoskeletal system complication
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert M96.840 to ICD-9-CMHistory

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

ICD-9-CM
998.12 Hematoma complic proc
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement M96.840 replaces the following previously assigned code(s):

  • M96.830 - Postproc hemor of a ms structure fol a ms sys procedure
  • M96.830 - Postproc hemor/hemtom of a ms structure fol a ms 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 M96.840Overview

Is M96.840 a billable code?

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

What MS-DRG does M96.840 group to?

When postprocedural hematoma of a musculoskeletal structure following a musculoskeletal 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 M96.840 a CC or MCC?

CMS lists M96.840 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 76 closely related codes in its exclusion list.

What is the ICD-9 equivalent of M96.840?

Under the General Equivalence Mappings, postprocedural hematoma of a musculoskeletal structure following a musculoskeletal system procedure converts to ICD-9-CM 998.12 (hematoma complic proc). The mapping is approximate, so confirm the match fits the documentation.