2026 ICD-10-CM Diagnosis Code D31.31Benign neoplasm of right choroid

ICD-10-CM Codes›C00–D49›D10-D36›D31

ICD-10-CM D31.31
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D31.31 is a billable ICD-10-CM diagnosis code for benign neoplasm of right 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. Coders also document this condition as benign neoplasm of left choroid. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Benign neoplasms.

Code Identity

ICD-10-CM Code
D31.31
Billable Status
Yes — Valid for Submission
Code Describes
Benign neoplasm of right choroid
Short Description
Benign neoplasm of right choroid
Same as the full description in the CMS dataset.
Parent Code
D31.3
Benign neoplasm of choroid

Code Classification

ChapterC00–D49Neoplasms
SectionD10-D36Benign neoplasms, except benign neuroendocrine tumors
CategoryD31Benign neoplasm of eye and adnexa
This CodeD31.31Benign neoplasm of right choroid

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Benign neoplasm of left choroid
  • Benign neoplasm of right choroid
  • Bilateral benign neoplasm of choroid
  • Nevus of choroid
  • Nevus of choroid of right eye

Clinical ClassificationClinical

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

CCSR NEO073
Benign neoplasms
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Choroid

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

  • Choroid Diseases

    disorders of the choroid including hereditary choroidal diseases, neoplasms, and other abnormalities of the vascular layer of the uvea.

  • Choroid Hemorrhage

    hemorrhage from the vessels of the choroid.

  • Choroid Neoplasms

    tumors of the choroid; most common intraocular tumors are malignant melanomas of the choroid. these usually occur after puberty and increase in incidence with advancing age. most malignant melanomas of the uveal tract develop from benign melanomas (nevi).

  • Choroid Plexus

    a villous structure of tangled masses of blood vessels contained within the third, lateral, and fourth ventricles of the brain. it regulates part of the production and composition of cerebrospinal fluid.

  • Choroid Plexus Neoplasms

    benign or malignant tumors which arise from the choroid plexus of the ventricles of the brain. papillomas (see papilloma, choroid plexus) and carcinomas are the most common histologic subtypes, and tend to seed throughout the ventricular and subarachnoid spaces. clinical features include headaches, ataxia and alterations of consciousness, primarily resulting from associated hydrocephalus. (from devita et al., cancer: principles and practice of oncology, 5th ed, p2072; j neurosurg 1998 mar;88(3):521-8)

  • Choroidal Effusions

    finding of fluid accumulation between the choroid and the sclera.

  • Choroidal Neovascularization

    a pathological process consisting of the formation of new blood vessels in the choroid.

  • Choroideremia

    an x chromosome-linked abnormality characterized by atrophy of the choroid and degeneration of the retinal pigment epithelium causing night blindness.

  • Choroiditis

    inflammation of the choroid.

  • Multifocal Choroiditis

    a multifocal uveitis syndrome involving the retinal pigment epithelium and capillary layer of the choroid. it is characterized by chronic uveitis and multiple choroid lesions referred to as white dots, blurry vision, floaters, sensitivity to light, blind spots, and eye discomfort.

  • Papilloma, Choroid Plexus

    a usually benign neoplasm that arises from the cuboidal epithelium of the choroid plexus and takes the form of an enlarged choroid plexus, which may be associated with oversecretion of csf. the tumor usually presents in the first decade of life with signs of increased intracranial pressure including headaches; ataxia; diplopia; and alterations of mental status. in children it is most common in the lateral ventricles and in adults it tends to arise in the fourth ventricle. malignant transformation to choroid plexus carcinomas may rarely occur. (adams et al., principles of neurology, 6th ed, p667; devita et al., cancer: principles and practice of oncology, 5th ed, p2072)

  • Polypoidal Choroidal Vasculopathy

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

  • Uveal Melanoma

    a rare, malignant melanoma arising from the melanocytes of the uvea.

  • White Dot Syndromes

    a group of idiopathic multifocal posterior uveitis syndromes involving the choroid; retinal pigment epithelium; and retina. they are characterized by multiple lesions of hypoautofluorescent dots in the fundus oculi and reduced visual acuity. several entities including birdshot chorioretinopathy are hla-a antigens serotype a29 positive.

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
choroidC69.3C79.49D09.2D31.3D48.7D49.81

Patient EducationClinical

Benign Tumors

Tumors are abnormal growths in your body. They can be either benign or malignant. Benign tumors aren't cancer. Malignant ones are. Benign tumors grow only in one place. They cannot spread or invade other parts of your body. Even so, they can be dangerous if they press on vital organs, such as your brain.

Read the full article at MedlinePlus

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

Convert D31.31 to ICD-9-CMHistory

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

ICD-9-CM
224.6 Benign neoplasm choroid
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 D31.31Overview

Is D31.31 (Benign neoplasm of choroid) a billable code?

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

What MS-DRG does D31.31 group to?

When benign neoplasm of right 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 D31.31?

Under the General Equivalence Mappings, benign neoplasm of right choroid converts to ICD-9-CM 224.6 (benign neoplasm choroid). 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.