2027 ICD-10-CM Diagnosis Code B56.0Gambiense trypanosomiasis
ICD-10-CM Codes›A00–B99›B50-B64›B56
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
B56.0 is a billable ICD-10-CM diagnosis code for gambiense trypanosomiasis. 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 69 closely related codes. Coders also document this condition as african trypanosomiasis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- African trypanosomiasis
- Encephalitis caused by Trypanosoma brucei
- Encephalitis caused by Trypanosoma brucei gambiense
- Infection by Trypanosoma gambiense
- Meningitis caused by Trypanosoma brucei
- Trypanosoma brucei gambiense meningitis
- Trypanosomiasis with encephalitis
- Trypanosomiasis with meningitis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to B56.0: its own notes plus those printed at 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.
- 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 Trypanosoma brucei gambiense
- West African sleeping sickness
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
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.
- 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.
- 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 B56.0, its category, or a range that includes it.
Applicable To 1
These notes mention B56.0.
- O98.6 Protozoal diseases complicating pregnancy, childbirth and the puerperium
Code First 2
These codes say to code first a condition named in the note, and B56.0 is one of the conditions named.
Index to Diseases and InjuriesGuidance
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Trypanosomiasis, African
a disease endemic among people and animals in central africa. it is caused by various species of trypanosomes, particularly t. gambiense and t. rhodesiense. its second host is the tsetse fly. involvement of the central nervous system produces african sleeping sickness. nagana is a rapidly fatal trypanosomiasis of horses and other animals.
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 B56.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B56.0Overview
What is the ICD-10 code for gambiense trypanosomiasis?
The ICD-10-CM code for gambiense trypanosomiasis is B56.0 (sometimes written as B560). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is B56.0 (African trypanosomiasis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report gambiense trypanosomiasis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does B56.0 group to?
When gambiense trypanosomiasis 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 B56.0 a CC or MCC?
CMS lists B56.0 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 69 closely related codes in its exclusion list.
Can B56.0 be reported with a code from A06?
Not as a rule. The Excludes1 note at block B50-B64, which applies to B56.0, lists "amebiasis (A06.-)". 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).
