2027 ICD-10-CM Diagnosis Code L76.33Postprocedural seroma of skin and subcutaneous tissue following a dermatologic procedure

ICD-10-CM Codes›L00–L99›L76›L76

ICD-10-CM L76.33
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L76.33 is a billable ICD-10-CM diagnosis code for postprocedural seroma of skin and subcutaneous tissue following a dermatologic 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 78 closely related codes. Coders also document this condition as seroma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative skin complication.

Code Identity

ICD-10-CM Code
L76.33
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural seroma of skin and subcutaneous tissue following a dermatologic procedure
Short Description
Postproc seroma of skin, subcu fol a dermatologic procedure
Parent Code
L76.3
Postprocedural hematoma and seroma of skin and subcutaneous tissue following a procedure

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL76Intraoperative and postprocedural complications of skin and subcutaneous tissue
CategoryL76Intraoperative and postprocedural complications of skin and subcutaneous tissue
This CodeL76.33Postprocedural seroma of skin and subcutaneous tissue following a dermatologic procedure

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Seroma
  • Seroma following procedure
  • Skin graft seroma

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L76.33: its own notes plus those printed at Chapter 12. 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 Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue applies to 1,001 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)
  • lipomelanotic reticulosis (I89.8)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • viral warts (B07.-)

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name L76.33, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming L76.33: its condition is not part of those codes, and both may be reported when the patient has both.

  • 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 L76.-, 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 L76.-, 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 SKN006
Postprocedural or postoperative skin complication
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert L76.33 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 L76.33 replaces the following previously assigned code(s):

  • L76.21 - Postproc hemor of skin, subcu fol a dermatologic procedure
  • L76.21 - Postproc hemor/hemtom of skin, subcu fol a dermatologic 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 L76.33Overview

Is L76.33 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report postprocedural seroma of skin and subcutaneous tissue following a dermatologic procedure on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does L76.33 group to?

When postprocedural seroma of skin and subcutaneous tissue following a dermatologic 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 L76.33 a CC or MCC?

CMS lists L76.33 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 78 closely related codes in its exclusion list.

What is the ICD-9 equivalent of L76.33?

Under the General Equivalence Mappings, postprocedural seroma of skin and subcutaneous tissue following a dermatologic procedure converts to ICD-9-CM 998.13 (seroma complicting proc). The mapping is approximate, so confirm the match fits the documentation.