2027 ICD-10-CM Diagnosis Code A28.0Pasteurellosis

ICD-10-CM Codes›A00–B99›A20-A28›A28

ICD-10-CM A28.0
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

A28.0 is a billable ICD-10-CM diagnosis code for pasteurellosis. 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 14 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections.

Code Identity

ICD-10-CM Code
A28.0
Billable Status
Yes — Valid for Submission
Code Describes
Pasteurellosis
Short Description
Pasteurellosis
Same as the full description in the CMS dataset.
Parent Code
A28
Other zoonotic bacterial diseases, not elsewhere classified

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA20-A28Certain zoonotic bacterial diseases
CategoryA28Other zoonotic bacterial diseases, not elsewhere classified
This CodeA28.0Pasteurellosis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bacterial osteomyelitis
  • Cat-bite fever
  • Cutaneous pasteurellosis
  • Infection by Pasteurella multocida
  • Infection caused by Rodentibacter pneumotropicus
  • Localized septic infection caused by Pasteurella multocida due to cat and/or dog bite
  • Mesenteric adenitis caused by Pasteurella multocida
  • Mesenteric lymphadenitis
  • Pasteurella abscess
  • Pasteurella infection
  • Pasteurella mesenteric adenitis
  • Pasteurella multocida osteomyelitis
  • Pasteurella septic infection
  • Septicemic pasteurellosis
  • Soft tissue pasteurellosis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to A28.0: its own notes plus those printed at 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

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.

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 INF003
Bacterial infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Pasteurella Infections

    infections with bacteria of the genus pasteurella.

Patient EducationClinical

Bacterial Infections

Bacteria are tiny organisms (living things) that have only one cell. Under a microscope, they look like balls, rods, or spirals. They can be found almost everywhere on Earth. There are lots of bacteria in and on your body. In fact, your body has about 10 times more bacteria cells than human cells.

The full article covers:

  • What are bacteria?
  • How do bacterial infections spread?
  • What are the treatments for bacterial infections?
  • Can bacterial infections be prevented?

Read the full article at MedlinePlus

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

Convert A28.0 to ICD-9-CMHistory

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

ICD-9-CM
027.2 Pasteurellosis
Exact Match The mapping is direct, with no qualifiers.

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 A28.0Overview

What is the ICD-10 code for pasteurellosis?

The ICD-10-CM code for pasteurellosis is A28.0 (sometimes written as A280). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is A28.0 (Other zoonotic bacterial diseases, not elsewhere classified) a billable code?

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

What MS-DRG does A28.0 group to?

When pasteurellosis 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 A28.0 a CC or MCC?

CMS lists A28.0 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 14 closely related codes in its exclusion list.

What is the ICD-9 equivalent of A28.0?

Under the General Equivalence Mappings, pasteurellosis converts to ICD-9-CM 027.2 (pasteurellosis). The mapping is a direct match.