2026 ICD-10-CM Diagnosis Code B95.61Methicillin susceptible Staphylococcus aureus infection as the cause of diseases classified elsewhere

ICD-10-CM Codes›A00–B99›B95-B97›B95

ICD-10-CM B95.61
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B95.61 is a billable ICD-10-CM diagnosis code for methicillin susceptible Staphylococcus aureus infection as the cause of diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 867 through 869. The code is not accepted as a principal diagnosis by the Medicare Code Editor. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections.

Code Identity

ICD-10-CM Code
B95.61
Billable Status
Yes — Valid for Submission
Code Describes
Methicillin susceptible Staphylococcus aureus infection as the cause of diseases classified elsewhere
Short Description
Methicillin suscep staph infct causing dis classd elswhr
Parent Code
B95.6
Staphylococcus aureus as the cause of diseases classified elsewhere

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB95-B97Bacterial and viral infectious agents
CategoryB95Streptococcus, Staphylococcus, and Enterococcus as the cause of diseases classified elsewhere
This CodeB95.61Methicillin susceptible Staphylococcus aureus infection as the cause of diseases classified elsewhere

Code EditsBilling

Medicare Code Editor checks that affect claim validity for B95.61.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bacterial osteomyelitis
  • Cellulitis caused by Staphylococcus aureus
  • Chancriform pyoderma
  • Early neonatal infection caused by bacterium
  • Early neonatal infection caused by Staphylococcus aureus
  • Ecthyma
  • Ecthyma caused by Staphylococcus aureus
  • Fetal infection caused by bacterium
  • Fetal infection caused by Staphylococcus aureus
  • Impetigo caused by Staphylococcus aureus
  • Infection by methicillin sensitive Staphylococcus aureus
  • Infection caused by Panton-Valentine leukocidin producing Staphylococcus aureus
  • Infection caused by Staphylococcus aureus
  • Infection of lacrimal gland caused by bacterium
  • Neonatal infective mastitis
  • Neonatal mastitis
  • Neonatal staphylococcal mastitis
  • Neonatal Staphylococcus aureus mastitis
  • Osteomyelitis caused by Staphylococcus aureus
  • Panton-Valentine leukocidin producing Staphylococcus aureus skin infection
  • Perinatal staphylococcal infection
  • Pyoderma ulcerosum tropicalum
  • Right sided infective endocarditis
  • Right-sided Staphylococcus aureus endocarditis
  • Staphylococcal endocarditis
  • Staphylococcal mastitis
  • Staphylococcal meningitis
  • Staphylococcal toxic shock syndrome
  • Staphylococcus aureus dacryoadenitis
  • Staphylococcus aureus meningitis
  • Toxic shock syndrome
  • Toxic shock syndrome caused by methicillin susceptible Staphylococcus aureus

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Methicillin susceptible Staphylococcus aureus (MSSA) infection as the cause of diseases classified elsewhere
  • Staphylococcus aureus infection NOS as the cause of diseases classified elsewhere

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.

    • Infection, infected, infective(opportunistic)
      • bacterial NOS
        • as cause of disease classified elsewhere
          • Staphylococcus
            • aureus (methicillin susceptible) (MSSA)
    • Infection, infected, infective(opportunistic)
      • staphylococcal, unspecified site
        • as cause of disease classified elsewhere
          • aureus (methicillin susceptible) (MSSA)
    • MSSA(Methicillin susceptible Staphylococcus aureus)
      • infection
        • as the cause of diseases classified elsewhere
    • Staphylococcus, staphylococcal
      • as cause of disease classified elsewhere
        • aureus (methicillin susceptible) (MSSA)

Clinical ClassificationClinical

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

CCSR INF003
Bacterial infections
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Ecthyma

    an ulcerative pyoderma usually caused by group a beta-hemolytic streptococcal infection at the site of minor trauma. (dorland, 27th ed)

  • Ecthyma, Contagious

    an infectious dermatitis of sheep and goats, affecting primarily the muzzle and lips. it is caused by a poxvirus and may be transmitted to man.

  • Orf virus

    the type species of parapoxvirus which causes a skin infection in natural hosts, usually young sheep. humans may contract local skin lesions by contact. the virus apparently persists in soil.

  • Parapoxvirus

    a genus of the family poxviridae, subfamily chordopoxvirinae, which infect ungulates and may infect humans. orf virus is the type species.

Patient EducationClinical

Staphylococcal Infections

Staphylococcus (staph) is a group of bacteria. There are more than 30 types. A type called Staphylococcus aureus causes most infections.

The full article covers:

  • What are Staphylococcal (staph) infections?
  • What causes staph infections?
  • Who is more likely to get a staph infection?
  • What are the symptoms of staph infections?
  • How are staph infections diagnosed?
  • What are the treatments for staph infections?
  • Can staph infections be prevented?

Read the full article at MedlinePlus

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

Convert B95.61 to ICD-9-CMHistory

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

ICD-9-CM
041.11 Mth sus Stph aur els/NOS
Approximate The match is approximate rather than exact.

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 B95.61Overview

Is B95.61 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report methicillin susceptible Staphylococcus aureus infection as the cause of diseases classified elsewhere on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B95.61 group to?

On inpatient claims, methicillin susceptible Staphylococcus aureus infection as the cause of diseases classified elsewhere maps to MS-DRG 867, 868, 869, with relative weights from 0.7297 to 2.0932 depending on complications. Higher weights mean higher Medicare reimbursement.

Can B95.61 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because methicillin susceptible Staphylococcus aureus infection as the cause of diseases classified elsewhere describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

What is the ICD-9 equivalent of B95.61?

Under the General Equivalence Mappings, methicillin susceptible Staphylococcus aureus infection as the cause of diseases classified elsewhere converts to ICD-9-CM 041.11 (mth sus Stph aur els/NOS). 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.