2026 ICD-10-CM Diagnosis Code H59.359Postprocedural seroma of unspecified eye and adnexa following an ophthalmic procedure

ICD-10-CM Codes›H00–H59›H59›H59

ICD-10-CM H59.359
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H59.359 is a billable ICD-10-CM diagnosis code for postprocedural seroma of unspecified eye and adnexa following an ophthalmic 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. The code is flagged as an unspecified code, since codes identifying laterality exist in the same family. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative eye complication.

Code Identity

ICD-10-CM Code
H59.359
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural seroma of unspecified eye and adnexa following an ophthalmic procedure
Short Description
Postproc seroma of unsp and adnexa fol an opth procedure
Parent Code
H59.35
Postprocedural seroma of eye and adnexa following an ophthalmic procedure

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH59Intraoperative and postprocedural complications and disorders of eye and adnexa, not elsewhere classified
CategoryH59Intraoperative and postprocedural complications and disorders of eye and adnexa, not elsewhere classified
This CodeH59.359Postprocedural seroma of unspecified eye and adnexa following an ophthalmic procedure

Code EditsBilling

Medicare Code Editor checks that affect claim validity for H59.359.

Unspecified codes
Unspecified codes exist in the ICD-10-CM classification for circumstances when documentation in the medical record does not provide the level of detail needed to support reporting a more specific code. However, in the inpatient setting, there should generally be very limited and rare circumstances for which the laterality (right, left, bilateral) of a condition is unable to be documented and reported. The following pages contain the list of unspecified ICD-10-CM diagnosis codes for which there is a more specific code to identify laterality (right, left, bilateral) within that code family.

Clinical ClassificationClinical

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

CCSR EYE011
Postprocedural or postoperative eye complication
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert H59.359 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 H59.359 replaces the following previously assigned code(s):

  • H59.319 - Postproc hemor of unsp and adnexa fol an opth procedure
  • H59.319 - Postproc hemor/hemtom of unsp eye and adnx fol an opth 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 H59.359Overview

Is H59.359 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report postprocedural seroma of unspecified eye and adnexa following an ophthalmic procedure on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H59.359 group to?

When postprocedural seroma of unspecified eye and adnexa following an ophthalmic 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 H59.359?

Under the General Equivalence Mappings, postprocedural seroma of unspecified eye and adnexa following an ophthalmic 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.