2026 ICD-10-CM Diagnosis Code H05.20Unspecified exophthalmos

ICD-10-CM Codes›H00–H59›H00-H05›H05

ICD-10-CM H05.20
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H05.20 is a billable ICD-10-CM diagnosis code for unspecified exophthalmos. 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 benign exophthalmos syndrome. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Oculofacial plastics and orbital conditions.

Code Identity

ICD-10-CM Code
H05.20
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified exophthalmos
Short Description
Unspecified exophthalmos
Same as the full description in the CMS dataset.
Parent Code
H05.2
Exophthalmic conditions

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH00-H05Disorders of eyelid, lacrimal system and orbit
CategoryH05Disorders of orbit
This CodeH05.20Unspecified exophthalmos

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Benign exophthalmos syndrome
  • Displacement of eye
  • Exophthalmos
  • Exophthalmos of bilateral eyes
  • Exophthalmos of left eye
  • Exophthalmos of right eye
  • Exophthalmos present

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

Clinical InformationClinical

  • Exophthalmos

    abnormal protrusion of both eyes; may be caused by endocrine gland malfunction, malignancy, injury, or paralysis of the extrinsic muscles of the eye.

  • Exophthalmos

    the anterior displacement of the eye within the orbit, giving a bulging appearance.

  • Proptosis|Exophthalmos

    abnormal protrusion of one or both eyes from the socket; causes include hyperthyroidism (particularly graves disease); bleeding behind the eye; infection, inflammation, or tumors of the orbit; and vascular disorders.

Patient EducationClinical

Eye Diseases

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Read the full article at MedlinePlus

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

Convert H05.20 to ICD-9-CMHistory

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

ICD-9-CM
376.30 Exophthalmos NOS
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 H05.20Overview

Is H05.20 (Exophthalmic conditions) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified exophthalmos on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H05.20 group to?

When unspecified exophthalmos 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 H05.20?

Under the General Equivalence Mappings, unspecified exophthalmos converts to ICD-9-CM 376.30 (exophthalmos NOS). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.