2026 ICD-10-CM Diagnosis Code B60.12Conjunctivitis due to Acanthamoeba

ICD-10-CM Codes›A00–B99›B50-B64›B60

ICD-10-CM B60.12
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B60.12 is a billable ICD-10-CM diagnosis code for conjunctivitis due to Acanthamoeba. 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 conjunctivitis caused by Acanthamoeba. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cornea and external disease; and Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
B60.12
Billable Status
Yes — Valid for Submission
Code Describes
Conjunctivitis due to Acanthamoeba
Short Description
Conjunctivitis due to Acanthamoeba
Same as the full description in the CMS dataset.
Parent Code
B60.1
Acanthamebiasis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB50-B64Protozoal diseases
CategoryB60Other protozoal diseases, not elsewhere classified
This CodeB60.12Conjunctivitis due to Acanthamoeba

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Conjunctivitis caused by Acanthamoeba
  • Parasitic conjunctivitis
  • Protozoal conjunctivitis

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.

    • Acanthamebiasis(with)
      • conjunctiva
    • Conjunctivitis(staphylococcal) (streptococcal) NOS
      • Acanthamoeba
    • Conjunctivitis(staphylococcal) (streptococcal) NOS
      • in (due to)
        • Acanthamoeba

Clinical ClassificationClinical

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

CCSR EYE001
Cornea and external disease
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Parasitic Diseases

Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not.

Read the full article at MedlinePlus

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

Convert B60.12 to ICD-9-CMHistory

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

ICD-9-CM
136.21 Infectn d/t acanthamoeba
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
372.15 Parasitic conjunctivitis
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.

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 B60.12Overview

Is B60.12 (Acanthamebiasis) a billable code?

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

What MS-DRG does B60.12 group to?

When conjunctivitis due to Acanthamoeba 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 B60.12?

Under the General Equivalence Mappings, conjunctivitis due to Acanthamoeba converts to ICD-9-CM 136.21 (infectn d/t acanthamoeba) and 372.15 (parasitic conjunctivitis). 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.