2026 ICD-10-CM Diagnosis Code H59.42Inflammation (infection) of postprocedural bleb, stage 2

ICD-10-CM Codes›H00–H59›H59›H59

ICD-10-CM H59.42
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H59.42 is a billable ICD-10-CM diagnosis code for inflammation (infection) of postprocedural bleb, stage 2. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative eye complication.

Code Identity

ICD-10-CM Code
H59.42
Billable Status
Yes — Valid for Submission
Code Describes
Inflammation (infection) of postprocedural bleb, stage 2
Short Description
Inflammation (infection) of postprocedural bleb, stage 2
Same as the full description in the CMS dataset.
Parent Code
H59.4
Inflammation (infection) of postprocedural bleb

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 CodeH59.42Inflammation (infection) of postprocedural bleb, stage 2

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.

    • Bleb(s)
      • inflamed (infected), postprocedural
        • stage 2
    • Blebitis, postprocedural
      • stage 2

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 H59.42 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
379.62 Inflam postproc bleb, 2
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H59.42Overview

Is H59.42 (Inflammation (infection) of postprocedural bleb) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report inflammation (infection) of postprocedural bleb, stage 2 on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H59.42 group to?

When inflammation (infection) of postprocedural bleb, stage 2 is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H59.42?

Under the General Equivalence Mappings, inflammation (infection) of postprocedural bleb, stage 2 converts to ICD-9-CM 379.62 (inflam postproc bleb, 2). The mapping is a direct match.

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.