2026 ICD-10-CM Diagnosis Code H04.323Acute dacryocystitis of bilateral lacrimal passages

ICD-10-CM Codes›H00–H59›H00-H05›H04

ICD-10-CM H04.323
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H04.323 is a billable ICD-10-CM diagnosis code for acute dacryocystitis of bilateral lacrimal passages. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 121 through 122. Coders also document this condition as acute dacryocystitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Oculofacial plastics and orbital conditions.

Code Identity

ICD-10-CM Code
H04.323
Billable Status
Yes — Valid for Submission
Code Describes
Acute dacryocystitis of bilateral lacrimal passages
Short Description
Acute dacryocystitis of bilateral lacrimal passages
Same as the full description in the CMS dataset.
Parent Code
H04.32
Acute dacryocystitis

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH00-H05Disorders of eyelid, lacrimal system and orbit
CategoryH04Disorders of lacrimal system
This CodeH04.323Acute dacryocystitis of bilateral lacrimal passages

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute dacryocystitis
  • Acute dacryocystitis of left lacrimal sac
  • Acute dacryocystitis of right lacrimal sac
  • Bilateral acute dacryocystitis
  • Dacryocystitis of bilateral lacrimal sacs
  • Dacryocystitis of left lacrimal sac
  • Dacryocystitis of right lacrimal sac

Clinical ClassificationClinical

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

CCSR EYE008
Oculofacial plastics and orbital conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

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Convert H04.323 to ICD-9-CMHistory

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

ICD-9-CM
375.32 Acute dacryocystitis
Approximate The match is approximate rather than exact.

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 H04.323Overview

Is H04.323 (Acute dacryocystitis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acute dacryocystitis of bilateral lacrimal passages on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H04.323 group to?

When acute dacryocystitis of bilateral lacrimal passages is the principal diagnosis on an inpatient stay, it groups to MS-DRG 121, 122, with relative weights from 0.7858 to 1.1633 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H04.323?

Under the General Equivalence Mappings, acute dacryocystitis of bilateral lacrimal passages converts to ICD-9-CM 375.32 (acute dacryocystitis). 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.