2023 ICD-10-CM Diagnosis Code A49.1

New Call-to-action

Streptococcal infection, unspecified site

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • A49.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2023 edition of ICD-10-CM A49.1 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of A49.1 - other international versions of ICD-10 A49.1 may differ.
The following code(s) above A49.1 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to A49.1:
  • A00-B99
    2023 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • 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 to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
  • A49
    ICD-10-CM Diagnosis Code A49

    Bacterial infection of unspecified site

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • bacterial agents as the cause of diseases classified elsewhere (B95-B96)
    • chlamydial infection NOS (A74.9)
    • meningococcal infection NOS (A39.9)
    • rickettsial infection NOS (A79.9)
    • spirochetal infection NOS (A69.9)
    Bacterial infection of unspecified site
Approximate Synonyms
  • Infection by streptococcus group c
  • Infection due to abiotrophia
  • Infection due to lactococcus
  • Infection due to streptococcus gallolyticus
  • Infection due to streptococcus group b
  • Infection due to streptococcus group d
  • Infection due to streptococcus group g
  • Infection due to streptococcus viridans group
  • Lactococcus infection
  • Nutritionally variant streptococci infection
  • Peptostreptococcus infection
  • Pneumococcal infection
  • Pneumococcal infectious disease
  • Streptococcal infection
  • Streptococcal infectious disease
  • Streptococcus bovis infection
  • Streptococcus gallolyticus infection
  • Streptococcus group a infection
  • Streptococcus group b infection
  • Streptococcus group c infection
  • Streptococcus group d infection
  • Streptococcus group g infection
  • Streptococcus pyogenes infection
  • Streptococcus viridans infection
Clinical Information
  • Any of the several infectious disorders caused by members of streptococcus, a genus of gram positive bacteria belonging to the family streptococcaceae. Streptococcal infections are classified into groups a, b, c, d and g.
  • Infections with bacteria of the genus streptococcus.
  • Streptococcal infections (strep for short) cause a variety of health problems. There are two types: group a and group b. Antibiotics are used to treat both.group a strep causes
    • strep throat - a sore, red throat, sometimes with white spots on the tonsils
    • scarlet fever - red rash on the body
    • impetigo - a skin infection
    • toxic shock syndrome
    • cellulitis and necrotizing fasciitis (flesh-eating disease)
    group b strep can cause blood infections, pneumonia and meningitis in newborns. A screening test during pregnancy can tell if you have it. If you do, i.v. Antibiotics during labor can save your baby's life. Adults can also get group b strep infections, especially if they are elderly or already have health problems. Strep b can cause urinary tract infections, blood infections, skin infections and pneumonia in adults.
ICD-10-CM A49.1 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 867 Other infectious and parasitic diseases diagnoses with mcc
  • 868 Other infectious and parasitic diseases diagnoses with cc
  • 869 Other infectious and parasitic diseases diagnoses without cc/mcc

Convert A49.1 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change

Diagnosis Index entries containing back-references to A49.1:

ICD-10-CM Codes Adjacent To A49.1
A48.3 Toxic shock syndrome
A48.4 Brazilian purpuric fever
A48.5 Other specified botulism
A48.51 Infant botulism
A48.52 Wound botulism
A48.8 Other specified bacterial diseases
A49 Bacterial infection of unspecified site
A49.0 Staphylococcal infection, unspecified site
A49.01 Methicillin susceptible Staphylococcus aureus infection, unspecified site
A49.02 Methicillin resistant Staphylococcus aureus infection, unspecified site
A49.1 Streptococcal infection, unspecified site
A49.2 Hemophilus influenzae infection, unspecified site
A49.3 Mycoplasma infection, unspecified site
A49.8 Other bacterial infections of unspecified site
A49.9 Bacterial infection, unspecified
A50 Congenital syphilis
A50.0 Early congenital syphilis, symptomatic
A50.01 Early congenital syphilitic oculopathy
A50.02 Early congenital syphilitic osteochondropathy
A50.03 Early congenital syphilitic pharyngitis
A50.04 Early congenital syphilitic pneumonia

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.