2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

B60.12 is a billable ICD-10-CM diagnosis code for conjunctivitis due to Acanthamoeba. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B60.12: its own notes plus those printed at B60, block B50-B64, and Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From B60 Other protozoal diseases, not elsewhere classified applies to 12 codes
  • cryptosporidiosis (A07.2)
  • intestinal microsporidiosis (A07.8)
  • isosporiasis (A07.3)
From Block B50-B64 Protozoal diseases applies to 57 codes
  • amebiasis (A06.-)
  • other protozoal intestinal diseases (A07.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name B60.12, its category, or a range that includes it.

Applicable To 1

These notes mention B60.12.

  • O98.6 Protozoal diseases complicating pregnancy, childbirth and the puerperium
    Conditions in B50-B64 names B50-B64, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming B60.12: its condition is not part of those codes, and both may be reported when the patient has both.

  • A06 Amebiasis
    acanthamebiasis (B60.1-) names B60.1-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About B60.12Overview

What is the ICD-10 code for conjunctivitis due to Acanthamoeba?

The ICD-10-CM code for conjunctivitis due to Acanthamoeba is B60.12 (sometimes written as B6012). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

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 125, 124, with relative weights from 0.7699 to 1.2470 depending on complications. Higher weights mean higher Medicare reimbursement.

Can B60.12 be reported with A07.2?

Not as a rule. The Excludes1 note at B60, which applies to B60.12, lists "cryptosporidiosis (A07.2)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

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.