2026 ICD-10-CM Diagnosis Code H31.8Other specified disorders of choroid

ICD-10-CM Codes›H00–H59›H30-H36›H31

ICD-10-CM H31.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H31.8 is a billable ICD-10-CM diagnosis code for other specified disorders of choroid. 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 Retinal and vitreous conditions.

Code Identity

ICD-10-CM Code
H31.8
Billable Status
Yes — Valid for Submission
Code Describes
Other specified disorders of choroid
Short Description
Other specified disorders of choroid
Same as the full description in the CMS dataset.
Parent Code
H31
Other disorders of choroid

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH30-H36Disorders of choroid and retina
CategoryH31Other disorders of choroid
This CodeH31.8Other specified disorders of choroid

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired hypopigmentation of choroid
  • Bilateral choroidal folds of eyes
  • Bilateral neovascularization of choroid of eye
  • Central serous choroidopathy of bilateral eyes
  • Central serous choroidopathy of left eye
  • Central serous choroidopathy of right eye
  • Chorioretinal vascular disorder
  • Choroid tubercles
  • Choroidal fold
  • Choroidal fold of left eye
  • Choroidal fold of right eye
  • Choroidal infarct
  • Choroidal pigmentation
  • Diffuse chorioretinal lesion
  • Flat chorioretinal lesion
  • Focal chorioretinal lesion
  • General disseminated chorioretinitis
  • Generalized disseminated choroiditis
  • Generalized disseminated choroiditis AND chorioretinitis
  • Generalized disseminated choroiditis AND chorioretinitis with acute necrosis
  • Hypertensive choroidopathy
  • Idiopathic choroidal fold of bilateral eyes
  • Idiopathic choroidal fold of left eye
  • Idiopathic choroidal fold of right eye
  • Idiopathic choroidal neovascular membrane
  • Idiopathic fold of choroid of eye
  • Idiopathic polypoidal choroidal vasculopathy
  • Microcephalus, lymphedema, chorioretinopathy syndrome
  • Multiple raised chorioretinal lesions
  • Neovascularization of choroid of left eye
  • Neovascularization of choroid of right eye
  • Occult neovascularization of macula
  • Pachychoroid neovasculopathy
  • Polypoidal choroidal vasculopathy
  • Polypoidal neovascularization of choroid of bilateral eyes
  • Polypoidal neovascularization of choroid of eye
  • Polypoidal neovascularization of choroid of left eye
  • Polypoidal neovascularization of choroid of right eye
  • Punched out chorioretinal lesion
  • Solitary raised chorioretinal lesion
  • Subfoveal choroidal neovascular membrane
  • Tigroid fundus

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.

    • Deformity
      • choroid (congenital)
        • acquired
    • Disease, diseased
      • choroid
        • specified NEC
    • Disorder(of)
      • choroid
        • specified type NEC
    • Sclerochoroiditis

Clinical ClassificationClinical

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

CCSR EYE005
Retinal and vitreous conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Polypoidal Choroidal Vasculopathy

    a choroid neovascularization characterized by serosanguineous retinal pigment epithelial detachment and leakage of serous exudate sometimes associated with aneurysmal polypoidal lesions.

  • Choroid

    the thin, highly vascular membrane covering most of the posterior of the eye between the retina and sclera.

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 H31.8 to ICD-9-CMHistory

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

ICD-9-CM
363.8 Disorders of choroid NEC
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 H31.8Overview

Is H31.8 (Other disorders of choroid) a billable code?

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

What MS-DRG does H31.8 group to?

When other specified disorders of choroid 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 H31.8?

Under the General Equivalence Mappings, other specified disorders of choroid converts to ICD-9-CM 363.8 (disorders of choroid NEC). The mapping is approximate, so confirm the match fits the documentation.

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.