2027 ICD-10-CM Diagnosis Code B60.01Babesiosis due to Babesia microti

ICD-10-CM Codes›A00–B99›B50-B64›B60

ICD-10-CM B60.01
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

B60.01 is a billable ICD-10-CM diagnosis code for babesiosis due to Babesia microti. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 867 through 869. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 46 closely related codes. Coders also document this condition as babesiosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
B60.01
Billable Status
Yes — Valid for Submission
Code Describes
Babesiosis due to Babesia microti
Short Description
Babesiosis due to Babesia microti
Same as the full description in the CMS dataset.
Parent Code
B60.0
Babesiosis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB50-B64Protozoal diseases
CategoryB60Other protozoal diseases, not elsewhere classified
This CodeB60.01Babesiosis due to Babesia microti

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Babesiosis
  • Disease caused by Babesiidae
  • Infection by Babesia microti

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B60.01: 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

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Infection due to B. microti

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 B60.01, its category, or a range that includes it.

Applicable To 1

These notes mention B60.01.

  • O98.6 Protozoal diseases complicating pregnancy, childbirth and the puerperium
    Conditions in B50-B64 names B50-B64, 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 INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Babesiosis

    a group of tick-borne diseases of mammals including zoonoses in humans. they are caused by protozoa of the genus babesia, which parasitize erythrocytes, producing hemolysis. in the u.s., the organism's natural host is mice and transmission is by the deer tick ixodes scapularis.

Code History & ChangesHistory

Replacement B60.01 replaces the following previously assigned code(s):

  • B60.0 - Babesiosis
FY 2021AddedAdded to the ICD-10-CM code setEffective October 1, 2020.
FY 2022–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About B60.01Overview

What is the ICD-10 code for babesiosis due to Babesia microti?

The ICD-10-CM code for babesiosis due to Babesia microti is B60.01 (sometimes written as B6001). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is B60.01 (Babesiosis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report babesiosis due to Babesia microti on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does B60.01 group to?

When babesiosis due to Babesia microti is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 869, 868, with relative weights from 0.6784 to 2.1855 depending on complications. Higher weights mean higher Medicare reimbursement.

Is B60.01 a CC or MCC?

CMS lists B60.01 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 46 closely related codes in its exclusion list.

Can B60.01 be reported with A07.2?

Not as a rule. The Excludes1 note at B60, which applies to B60.01, 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).