2026 ICD-10-CM Diagnosis Code H95.53Postprocedural seroma of ear and mastoid process following a procedure on the ear and mastoid process

ICD-10-CM Codes›H60–H95›H95›H95

ICD-10-CM H95.53
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H95.53 is a billable ICD-10-CM diagnosis code for postprocedural seroma of ear and mastoid process following a procedure on the ear and mastoid process. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative ear and/or mastoid process complication.

Code Identity

ICD-10-CM Code
H95.53
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural seroma of ear and mastoid process following a procedure on the ear and mastoid process
Short Description
Postprocedural seroma of ear/mastd fol proc on ear/mastd
Parent Code
H95.5
Postprocedural hematoma and seroma of ear and mastoid process following a procedure

Code Classification

ChapterH60–H95Diseases of the ear and mastoid process
SectionH95Intraoperative and postprocedural complications and disorders of ear and mastoid process, not elsewhere classified
CategoryH95Intraoperative and postprocedural complications and disorders of ear and mastoid process, not elsewhere classified
This CodeH95.53Postprocedural seroma of ear and mastoid process following a procedure on the ear and mastoid process

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)
          • ear
            • following procedure on ear and mastoid process
    • Complication(s) (from) (of)
      • postprocedural
        • seroma (of)
          • mastoid process
            • following procedure on ear and mastoid process

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR EAR005
Postprocedural or postoperative ear and/or mastoid process complication
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert H95.53 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 H95.53 replaces the following previously assigned code(s):

  • H95.41 - Postproc hemor/hemtom of ear/mastd fol proc on ear/mastd
  • H95.41 - Postprocedural hemorrhage of ear/mastd fol proc on ear/mastd
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 H95.53Overview

Is H95.53 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report postprocedural seroma of ear and mastoid process following a procedure on the ear and mastoid process on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H95.53 group to?

When postprocedural seroma of ear and mastoid process following a procedure on the ear and mastoid process 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 H95.53?

Under the General Equivalence Mappings, postprocedural seroma of ear and mastoid process following a procedure on the ear and mastoid process 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.