2026 ICD-10-CM Diagnosis Code H05.413Enophthalmos due to atrophy of orbital tissue, bilateral

ICD-10-CM Codes›H00–H59›H00-H05›H05

ICD-10-CM H05.413
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H05.413 is a billable ICD-10-CM diagnosis code for enophthalmos due to atrophy of orbital tissue, bilateral. 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. Coders also document this condition as bilateral enophthalmos. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Oculofacial plastics and orbital conditions.

Code Identity

ICD-10-CM Code
H05.413
Billable Status
Yes — Valid for Submission
Code Describes
Enophthalmos due to atrophy of orbital tissue, bilateral
Short Description
Enophthalmos due to atrophy of orbital tissue, bilateral
Same as the full description in the CMS dataset.
Parent Code
H05.41
Enophthalmos due to atrophy of orbital tissue

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH00-H05Disorders of eyelid, lacrimal system and orbit
CategoryH05Disorders of orbit
This CodeH05.413Enophthalmos due to atrophy of orbital tissue, bilateral

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral enophthalmos
  • Bilateral enophthalmos due to orbital atrophy
  • Enophthalmos due to orbital tissue atrophy
  • Enophthalmos of left eye
  • Enophthalmos of left eye due to orbital tissue atrophy
  • Enophthalmos of right eye
  • Enophthalmos of right eye due to orbital tissue atrophy

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 H05.413 to ICD-9-CMHistory

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

ICD-9-CM
376.51 Enophth d/t orbit atrphy
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 H05.413Overview

Is H05.413 (Enophthalmos due to atrophy of orbital tissue) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report enophthalmos due to atrophy of orbital tissue, bilateral on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H05.413 group to?

When enophthalmos due to atrophy of orbital tissue, bilateral 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 H05.413?

Under the General Equivalence Mappings, enophthalmos due to atrophy of orbital tissue, bilateral converts to ICD-9-CM 376.51 (enophth d/t orbit atrphy). 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.