2026 ICD-10-CM Diagnosis Code H59.342Postprocedural hematoma of left eye and adnexa following other procedure

ICD-10-CM Codes›H00–H59›H59›H59

ICD-10-CM H59.342
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H59.342 is a billable ICD-10-CM diagnosis code for postprocedural hematoma of left eye and adnexa following other 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative eye complication.

Code Identity

ICD-10-CM Code
H59.342
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural hematoma of left eye and adnexa following other procedure
Short Description
Postproc hematoma of left eye and adnexa fol other procedure
Parent Code
H59.34
Postprocedural hematoma of eye and adnexa following other 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 CodeH59.342Postprocedural hematoma of left eye and adnexa following other procedure

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 H59.342 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 H59.342 replaces the following previously assigned code(s):

  • H59.322 - Postproc hemor of left eye and adnexa fol other procedure
  • H59.322 - Postproc hemor/hemtom of left eye and adnexa fol oth 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 H59.342Overview

Is H59.342 a billable code?

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

What MS-DRG does H59.342 group to?

When postprocedural hematoma of left eye and adnexa following other 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 H59.342?

Under the General Equivalence Mappings, postprocedural hematoma of left eye and adnexa following other procedure converts to ICD-9-CM 998.12 (hematoma complic 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.