2026 ICD-10-CM Diagnosis Code H05.322Deformity of left orbit due to bone disease

ICD-10-CM Codes›H00–H59›H00-H05›H05

ICD-10-CM H05.322
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H05.322 is a billable ICD-10-CM diagnosis code for deformity of left orbit due to bone disease. 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 left orbital deformity. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Oculofacial plastics and orbital conditions.

Code Identity

ICD-10-CM Code
H05.322
Billable Status
Yes — Valid for Submission
Code Describes
Deformity of left orbit due to bone disease
Short Description
Deformity of left orbit due to bone disease
Same as the full description in the CMS dataset.
Parent Code
H05.32
Deformity of orbit due to bone disease

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH00-H05Disorders of eyelid, lacrimal system and orbit
CategoryH05Disorders of orbit
This CodeH05.322Deformity of left orbit due to bone disease

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Left orbital deformity
  • Left orbital deformity due to bone disease
  • Orbital deformity due to bone disease

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

Eye Diseases

Even if your eyes feel healthy, you could have a problem and not know it. That's why regular eye exams are so important. Refractive errors are the most common type of vision problem that makes it hard to see clearly. But some eye conditions or diseases don't have any symptoms and can lead to a permanent loss of vision.

The full article covers:

  • What diseases can affect the eye?
  • What are the symptoms of eye diseases?
  • Who is more likely to develop eye diseases?
  • What are the treatments for eye diseases?
  • Can eye diseases be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert H05.322 to ICD-9-CMHistory

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

ICD-9-CM
376.43 Orbt deform d/t bone dis
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 H05.322Overview

Is H05.322 (Deformity of orbit due to bone disease) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report deformity of left orbit due to bone disease on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H05.322 group to?

When deformity of left orbit due to bone disease 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 H05.322?

Under the General Equivalence Mappings, deformity of left orbit due to bone disease converts to ICD-9-CM 376.43 (orbt deform d/t bone dis). 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.