2026 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 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

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 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 919 through 921. 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

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Complication(s) (from) (of)
      • postprocedural
        • seroma (of)
          • skin and subcutaneous tissue
            • following dermatologic procedure

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

Clinical InformationClinical

  • Seroma

    tumor-like sterile accumulation of serum in a tissue, organ, or cavity. it results from a tissue insult and is the product of tissue inflammation. it most commonly occurs following mastectomy.

  • Mastectomy

    surgical procedure to remove one or both breasts.

  • Grade 1 Seroma, CTCAE|Grade 1 Seroma|Grade 1 Seroma

    symptomatic; simple aspiration indicated

  • Grade 2 Seroma, CTCAE|Grade 2 Seroma|Grade 2 Seroma

    symptomatic, elective invasive intervention indicated

  • Grade 3 Seroma, CTCAE|Grade 3 Seroma|Grade 3 Seroma

    a finding of leakage due to breakdown of an anastomosis (surgical connection of two separate anatomic structures) in the small bowel.

  • Seroma, CTCAE|Seroma|Seroma|Seroma

    asymptomatic; clinical or diagnostic observations only; intervention not indicated

  • Grade 1 Seroma, CTCAE|Grade 1 Seroma|Grade 1 Seroma

    asymptomatic; clinical or diagnostic observations only; intervention not indicated

  • Grade 2 Seroma, CTCAE|Grade 2 Seroma|Grade 2 Seroma

    symptomatic; simple aspiration indicated

  • Grade 3 Seroma, CTCAE|Grade 3 Seroma|Grade 3 Seroma

    symptomatic, elective invasive intervention indicated

  • Seroma

    a collection of serum in the body.

  • Seroma, CTCAE|Seroma|Seroma|Seroma

    a finding of tumor-like collection of serum in the tissues.

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 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

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, 2025 through September 30, 2026.

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 919, 920, 921, with relative weights from 0.6884 to 1.8308 depending on complications. Higher weights mean higher Medicare reimbursement.

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.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.