ICD-10 Diagnosis Code A49.9

Bacterial infection, unspecified

Diagnosis Code A49.9

ICD-10: A49.9
Short Description: Bacterial infection, unspecified
Long Description: Bacterial infection, unspecified
This is the 2018 version of the ICD-10-CM diagnosis code A49.9

Valid for Submission
The code A49.9 is valid for submission for 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 diagnosis code A49.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
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.

  • Abscess of aortic valve
  • Abscess of mitral valve
  • Abscess of pulmonary valve
  • Acne with gram negative folliculitis
  • Acute bacterial otitis externa
  • Acute bacterial tubulointerstitial nephritis
  • Acute infectious tubulointerstitial nephritis
  • Acute infective otitis externa
  • Acute interstitial nephritis
  • Acute upper urinary tract infection
  • Angular cheilitis
  • Angular cheilitis due to bacterial infection
  • Bacterial abscess of aortic valve
  • Bacterial abscess of mitral valve
  • Bacterial abscess of pulmonary valve
  • Bacterial cellulitis
  • Bacterial corneal ulcer
  • Bacterial encephalitis
  • Bacterial endophthalmitis
  • Bacterial esophagitis
  • Bacterial folliculitis
  • Bacterial genital infection
  • Bacterial infection associated with peritoneal dialysis catheter
  • Bacterial infection by site
  • Bacterial infection of central nervous system
  • Bacterial infection of skin
  • Bacterial infectious disease
  • Bacterial musculoskeletal infection
  • Bacterial oral infection
  • Bacterial osteomyelitis
  • Bacterial otitis media
  • Bacterial respiratory infection
  • Bacterial sinusitis
  • Bacterial tonsillitis
  • Bacterial upper respiratory infection
  • Bacterial urogenital infection
  • Beta lactam resistant bacterial infection
  • Botryomycosis
  • Dental caries extending into dentin
  • Disease caused by Gram-negative bacteria
  • Erythema nodosum due to bacterial infection
  • Gram-negative bacterial cellulitis
  • Gram-negative folliculitis
  • Infection caused by anaerobic bacteria
  • Infection caused by antimicrobial resistant bacteria
  • Infection caused by carbapenem resistant bacteria
  • Infection caused by multi antimicrobial drug resistant bacteria
  • Infection caused by quinolone and fluoroquinolone resistant bacteria
  • Infection caused by sulfonamide resistant organism
  • Infective corneal ulcer
  • Infective esophagitis
  • Moderate cavitated lesion limited to outer half of dentin
  • Neuropathy caused by bacterial toxin
  • Non-pyogenic bacterial infection of skin
  • Peripheral neuropathy caused by toxin
  • Pleural effusion caused by bacterial infection
  • Pleural effusion due to another disorder
  • Recurrent bacterial infection
  • Superficial bacterial infection of skin

Index of Diseases and Injuries
References found for the code A49.9 in the Index of Diseases and Injuries:

Information for Patients

Bacterial Infections

Bacteria are living things that have only one cell. Under a microscope, they look like balls, rods, or spirals. They are so small that a line of 1,000 could fit across a pencil eraser. Most bacteria won't hurt you - less than 1 percent of the different types make people sick. Many are helpful. Some bacteria help to digest food, destroy disease-causing cells, and give the body needed vitamins. Bacteria are also used in making healthy foods like yogurt and cheese.

But infectious bacteria can make you ill. They reproduce quickly in your body. Many give off chemicals called toxins, which can damage tissue and make you sick. Examples of bacteria that cause infections include Streptococcus, Staphylococcus, and E. coli.

Antibiotics are the usual treatment. When you take antibiotics, follow the directions carefully. Each time you take antibiotics, you increase the chances that bacteria in your body will learn to resist them causing antibiotic resistance. Later, you could get or spread an infection that those antibiotics cannot cure.

NIH: National Institute of Allergy and Infectious Diseases

  • Actinomycosis (Medical Encyclopedia)
  • Bacterial vaginosis -- aftercare (Medical Encyclopedia)
  • Blood culture (Medical Encyclopedia)
  • Gram stain (Medical Encyclopedia)
  • Gram stain of skin lesion (Medical Encyclopedia)
  • Necrotizing soft tissue infection (Medical Encyclopedia)

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