2026 ICD-10-CM Diagnosis Code D31.00Benign neoplasm of unspecified conjunctiva

ICD-10-CM Codes›C00–D49›D10-D36›D31

ICD-10-CM D31.00
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D31.00 is a billable ICD-10-CM diagnosis code for benign neoplasm of unspecified conjunctiva. 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 Benign neoplasms.

Code Identity

ICD-10-CM Code
D31.00
Billable Status
Yes — Valid for Submission
Code Describes
Benign neoplasm of unspecified conjunctiva
Short Description
Benign neoplasm of unspecified conjunctiva
Same as the full description in the CMS dataset.
Parent Code
D31.0
Benign neoplasm of conjunctiva

Code Classification

ChapterC00–D49Neoplasms
SectionD10-D36Benign neoplasms, except benign neuroendocrine tumors
CategoryD31Benign neoplasm of eye and adnexa
This CodeD31.00Benign neoplasm of unspecified conjunctiva

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Benign neoplasm of canthus
  • Benign neoplasm of conjunctiva
  • Benign neoplasm of lacrimal caruncle
  • Bulbar conjunctival cyst
  • Conjunctival cystoid nevus
  • Dermoid cyst of conjunctiva
  • Dermoid cyst of eye proper
  • Dermoid cyst of limbal conjunctiva
  • Focal lesion of bulbar conjunctiva
  • Focal lesion of palpebral conjunctiva
  • Lacrimal caruncle finding
  • Lump in caruncle of eye
  • Nevus of conjunctiva
  • Palpebral conjunctiva papilloma
  • Papilloma of caruncle
  • Papilloma of conjunctiva
  • Pedunculated conjunctival papilloma
  • Primary acquired melanosis of conjunctiva without atypia
  • Sessile conjunctival papilloma

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

  • Conjunctiva

    the mucous membrane that covers the posterior surface of the eyelids and the anterior pericorneal surface of the eyeball.

  • Conjunctival Diseases

    diseases involving the conjunctiva.

  • Conjunctival Neoplasms

    tumors or cancer of the conjunctiva.

  • Lacrimal Apparatus

    the tear-forming and tear-conducting system which includes the lacrimal glands, eyelid margins, conjunctival sac, and the tear drainage system.

Table of NeoplasmsClinical

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

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
conjunctivaC69.0C79.49D09.2D31.0D48.7D49.89

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 D31.00 to ICD-9-CMHistory

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

ICD-9-CM
224.3 Benign neo conjunctiva
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 D31.00Overview

Is D31.00 (Benign neoplasm of conjunctiva) a billable code?

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

What MS-DRG does D31.00 group to?

When benign neoplasm of unspecified conjunctiva 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 D31.00?

Under the General Equivalence Mappings, benign neoplasm of unspecified conjunctiva converts to ICD-9-CM 224.3 (benign neo conjunctiva). 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.