ICD-10 Code A49.1

Streptococcal infection, unspecified site

Version 2019 Billable Code
ICD-10: A49.1
Short Description:Streptococcal infection, unspecified site
Long Description:Streptococcal infection, unspecified site

Valid for Submission

ICD-10 A49.1 is a billable code used to specify a medical diagnosis of streptococcal infection, unspecified site. The code is valid for the year 2019 for the submission of HIPAA-covered transactions.

Code Classification

  • Certain infectious and parasitic diseases (A00–B99)
    • Other bacterial diseases (A30-A49)
      • Bacterial infection of unspecified site (A49)

Information for Medical Professionals

Diagnostic Related Groups

The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). The diagnosis code A49.1 is grouped in the following groups for version MS-DRG V36.0 applicable from 10/01/2018 through 09/30/2019.


Convert A49.1 to ICD-9

The following crosswalk between ICD-10 to ICD-9 is based based on the General Equivalence Mappings (GEMS) information:

  • 041.00 - Streptococcus unspecf (Approximate Flag)


The following clinical terms are approximate synonyms:

  • Bacterial infection due to Streptococcus milleri group
  • Drug resistant Streptococcus pneumoniae disease
  • Infantile streptococcal infection
  • Infantile streptococcal infection
  • Infection caused by alpha-hemolytic Streptococcus
  • Infection caused by beta-hemolytic Streptococcus
  • Infection caused by gamma-hemolytic Streptococcus
  • Infection caused by Streptococcus mitis group
  • Infection due to Streptococcus gallolyticus
  • Infection due to Streptococcus group D
  • Infection due to Streptococcus group G
  • Infection due to Streptococcus suis
  • Infection due to Streptococcus viridans group
  • Invasive beta-hemolytic streptococcal disease
  • Invasive beta-hemolytic streptococcal disease, non-Group A, non-Group B
  • Invasive drug resistant Streptococcus pneumoniae disease
  • Invasive streptococcal disease
  • Invasive Streptococcus pneumoniae disease
  • Neonatal streptococcal infection
  • Pneumococcal infectious disease
  • Streptococcal infectious disease
  • Streptococcus acidominimus or Streptococcus pneumoniae or Streptococcus morbillorum
  • Streptococcus agalactiae infection
  • Streptococcus anginosus or Streptococcus dysgalactiae subspecies dysgalactiae
  • Streptococcus anginosus or Streptococcus intermedius
  • Streptococcus constellatus or Streptococcus anginosus
  • Streptococcus group B infection of the infant
  • Streptococcus group B infection of the infant - age less than 30 days
  • Streptococcus lutetiensis or Streptococcus bovis
  • Streptococcus mitis or Streptococcus oralis
  • Streptococcus morbillorum or Streptococcus agalactiae or Streptococcus acidominimus
  • Streptococcus pyogenes infection
  • Streptococcus sanguinis or Streptococcus gordonii

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code A49.1 are found in the index:

Information for Patients

Streptococcal Infections

Also called: Strep

Strep is short for Streptococcus, a type of bacteria. There are two types: group A and group B.

Group A strep causes

  • Strep throat - a sore, red throat. Your tonsils may be swollen and have white spots on them.
  • Scarlet fever - an illness that follows strep throat. It causes a 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.

Antibiotics are used to treat strep infections.

NIH: National Institute of Allergy and Infectious Diseases

  • Ecthyma (Medical Encyclopedia)
  • Erysipelas (Medical Encyclopedia)
  • Group B streptococcal septicemia of the newborn (Medical Encyclopedia)
  • Group B streptococcus - pregnancy (Medical Encyclopedia)
  • Perianal streptococcal cellulitis (Medical Encyclopedia)
  • Rheumatic fever (Medical Encyclopedia)
  • Scarlet fever (Medical Encyclopedia)
  • Strep throat (Medical Encyclopedia)
  • Streptococcal screen (Medical Encyclopedia)
  • Throat swab culture (Medical Encyclopedia)
  • Toxic shock syndrome (Medical Encyclopedia)

[Learn More]

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.