A49.9
BillableBacterial infection, unspecified
Bacterial infection, unspecified
Coding Notes
Includes
Conditions included under this code
- diseases generally recognized as communicable or transmissible
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- certain localized infections - see body system-related chapters
- •bacterial agents as the cause of diseases classified elsewhereB95-B96
- •chlamydial infection NOSA74.9
- •meningococcal infection NOSA39.9
- •rickettsial infection NOSA79.9
- •spirochetal infection NOSA69.9
- •bacteremia NOSR78.81
Excludes 2
Conditions not included here, but the patient may have both
Use Additional Code
Additional codes that should follow this code
Related Codes(5)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(261)
SNOMED CT
- Acute bacterial TIN (tubulointerstitial nephritis)22352007
- Acute bacterial tubulointerstitial nephritis22352007
- AIN - Acute interstitial nephritis28637003
- ATIN - Acute tubulo-interstitial nephritis28637003
- Acute TIN (tubulointerstitial nephritis)28637003
- Acute interstitial nephritis28637003
- Acute tubulo-interstitial nephritis28637003
- Acute tubulointerstitial disease28637003
- Acute tubulointerstitial nephritis28637003
- APN - Acute pyelonephritis36689008
- Acute PN - pyelonephritis36689008
- Acute kidney infection36689008
- Acute pyelonephritis36689008
- Polyneuropathy due to toxic agents45600000
- Toxic polyneuropathy45600000
- Bacterial osteomyelitis61011009
- Acute infectious tubulointerstitial nephritis66993009
- Acute infective interstitial nephritis66993009
- Bacterial disease87628006
- Bacterial infection87628006
- Bacterial infectious disease87628006
- Disease caused by bacteria87628006
- Bacterial infection of central nervous system128119004
- Bacterial dermatological disorders128936008
- Bacterial infection of skin128936008
- Bacterial infection of skin and subcutis128936008
- Bacterial encephalitis230181004
- Neuropathy caused by bacterial toxin230611005
- Bacterial corneal ulcer231893002
- Bacterial esophagitis235601001
- Bacterial oesophagitis235601001
- Gram-negative folliculitis238380009
- Actinophytosis238413001
- Bacterial pseudomycosis238413001
- Botryomycosis238413001
- Non-pyogenic bacterial infection of skin238417000
- Angular cheilitis266429005
- Angular stomatitis266429005
- Perleche266429005
- Perlèche266429005
- Acute infective otitis externa267665002
- Superficial bacterial infection of skin275441009
- Bacterial respiratory infection312117008
- Bacterial upper respiratory infection312118003
- Upper respiratory bacterial infection312118003
- Bacterial urogenital infection312123003
- Bacterial genital infection312125005
- Bacterial musculoskeletal infection312126006
- Bacterial oral infection312128007
- Disease caused by Gram-negative bacteria371583007
- Bacterial folliculitis399324007
- Acne with gram negative folliculitis402642005
- Gram-negative bacterial cellulitis402927009
- Bacterial cellulitis402929007
- Erythema nodosum caused by Bacteria402968000
- Erythema nodosum due to bacterial infection402968000
- Infection caused by antimicrobial resistant bacteria409796004
- Infection caused by resistant bacteria409796004
- Bacterial endophthalmitis413626002
- Anaerobic bacterial infection423451008
- Infection caused by anaerobic bacteria423451008
- Beta lactam resistant bacterial infection426084006
- Recurrent bacterial infection428875002
- Abscess of aortic valve430065009
- Abscess of mitral valve430616003
- Infection caused by quinolone and fluoroquinolone resistant bacteria430946003
- Abscess of pulmonary valve431238002
- Bacterial abscess of pulmonary valve431261000
- Bacterial abscess of mitral valve431262007
- Bacterial abscess of aortic valve432992007
- Infection associated with peritoneal dialysis catheter473069007
- Acute bacterial otitis externa700220003
- Moderate cavitated lesion limited to outer half of dentin703339005
- Bacterial tonsillitis703468005
- Bacterial otitis media703469002
- Bacterial sinusitis703470001
- Angular cheilitis due to bacterial infection707240008
- Bacterial angular cheilitis707240008
- Carbapenem resistant bacterial infection707274007
- Infection caused by carbapenem resistant bacteria707274007
- Peripheral neuropathy caused by toxin709143008
- Pyogenic bacterial infection due to MyD88 deficiency718232007
- Pyogenic bacterial infection due to deficiency of myeloid differentiation primary response 88718232007
- Bacterial toxin-mediated cutaneous reaction762285009
- Cutaneous reaction caused by bacterial toxin762285009
- Autoinflammatory syndrome with pyogenic bacterial infection and amylopectinosis829973009
- Bacterial infection due to HIV infection838338001
- Bacterial infection due to human immunodeficiency virus infection838338001
- Acute bacterial pyelonephritis838353009
- Acute pyelonephritis caused by bacterium838353009
- Bacterial infection of tendon sheath866138009
- Bacterial tenosynovitis866138009
- Infection of tendon sheath caused by bacterium866138009
- Neonatal hyperbilirubinaemia due to bacterial infection1142078006
- Neonatal hyperbilirubinemia due to bacterial infection1142078006
- Invasive bacterial infection1300178001
- Invasive bacterial infectious disease1300178001
- Autoinflammatory syndrome with pyogenic bacterial infection and amylopectinosis due to HOIL-1 deficiency1365687001
- Autoinflammatory syndrome with pyogenic bacterial infection and amylopectinosis due to HOIP deficiency1365687001
- Autoinflammatory syndrome with pyogenic bacterial infection and amylopectinosis due to RNF31 mutation1365687001
- Bacterial infection associated with peritoneal dialysis catheter442171000124103
- Bacterial infection co-occurrent and due to herpes zoster12561000132105
- Herpes zoster with secondary bacterial infection12561000132105
- Bacterial nephritis42231000009109
- Infection caused by aminoglycoside resistant bacteria125871000119102
- Infection caused by multi antimicrobial drug resistant bacteria32811000119109
- Infection caused by multi drug resistant bacteria32811000119109
- Pleural effusion caused by bacteria105901000119108
- Pleural effusion caused by bacterial infection105901000119108
UMLS
- BACT INFECTC0004623
- Bacterial DiseaseC0004623
- Bacterial DiseasesC0004623
- Bacterial DisorderC0004623
- Bacterial InfectionC0004623
- Bacterial InfectionsC0004623
- Bacterial diseaseC0004623
- Bacterial infectionC0004623
- Bacterial infection NOSC0004623
- Bacterial infection of unspecified siteC0004623
- Bacterial infection, unspecifiedC0004623
- Bacterial infectionsC0004623
- Bacterial infectious diseaseC0004623
- Bacterial infectious disease (disorder)C0004623
- Bacterial infectious disordersC0004623
- Disease caused by bacteriaC0004623
- INFECT BACTC0004623
- Infection bacterialC0004623
- Infection, BacterialC0004623
- Infections, BacterialC0004623
- bacteria caused diseaseC0004623
- bacteria caused diseasesC0004623
- bacterial diseaseC0004623
- bacterial diseasesC0004623
- bacterial infectionC0004623
- bacterial infectionsC0004623
- bacterial infectious diseasesC0004623
- disease caused by bacteriaC0004623
- other bacterial infectionC0004623
Clinical Terms
- Acute infective interstitial nephritis
- Bacterial abscess of aortic valve
- Toxic polyneuropathy
- Neonatal hyperbilirubinaemia due to bacterial infection
- Bacterial toxin-mediated cutaneous reaction
- Autoinflammatory syndrome with pyogenic bacterial infection and amylopectinosis due to HOIP deficiency
- other bacterial infection
- Bacterial cellulitis
- Bacterial musculoskeletal infection
- Bacterial tenosynovitis
- INFECT BACT
- Bacterial genital infection
- Bacterial Disorder
- Acute tubulointerstitial nephritis
- Polyneuropathy due to toxic agents
- Actinophytosis
- Bacterial urogenital infection
- Bacterial infection associated with peritoneal dialysis catheter
- Acne with gram negative folliculitis
- Bacterial nephritis
- Infection caused by aminoglycoside resistant bacteria
- Autoinflammatory syndrome with pyogenic bacterial infection and amylopectinosis
- bacterial disease
- Gram-negative folliculitis
- Acute interstitial nephritis
- Bacterial tonsillitis
- Bacterial infection due to human immunodeficiency virus infection
- Pleural effusion caused by bacterial infection
- Acute pyelonephritis caused by bacterium
- Bacterial Diseases
- Upper respiratory bacterial infection
- Autoinflammatory syndrome with pyogenic bacterial infection and amylopectinosis due to HOIL-1 deficiency
- Bacterial infection of skin and subcutis
- Pyogenic bacterial infection due to deficiency of myeloid differentiation primary response 88
- Infections, Bacterial
- Infection associated with peritoneal dialysis catheter
- Autoinflammatory syndrome with pyogenic bacterial infection and amylopectinosis due to RNF31 mutation
- Botryomycosis
- Peripheral neuropathy caused by toxin
- bacterial infections
- Beta lactam resistant bacterial infection
- Bacterial sinusitis
- Infection caused by antimicrobial resistant bacteria
- Non-pyogenic bacterial infection of skin
- Acute kidney infection
- Bacterial respiratory infection
- Bacterial esophagitis
- Bacterial osteomyelitis
- Abscess of pulmonary valve
- Anaerobic bacterial infection
- Infection caused by resistant bacteria
- Invasive bacterial infection
- bacteria caused diseases
- ATIN - Acute tubulo-interstitial nephritis
- Bacterial infection of skin
- BACT INFECT
- Pyogenic bacterial infection due to MyD88 deficiency
- Invasive bacterial infectious disease
- Neuropathy caused by bacterial toxin
- Bacterial pseudomycosis
- Acute infective otitis externa
- Angular stomatitis
- Bacterial infectious disease
- bacteria caused disease
- Disease caused by bacteria
- Acute pyelonephritis
- Perleche
- Infection caused by anaerobic bacteria
- Acute TIN (tubulointerstitial nephritis)
- Infection caused by multi antimicrobial drug resistant bacteria
- Moderate cavitated lesion limited to outer half of dentin
- Bacterial infection of tendon sheath
- Cutaneous reaction caused by bacterial toxin
- Bacterial corneal ulcer
- Angular cheilitis due to bacterial infection
- Infection caused by carbapenem resistant bacteria
- Acute PN - pyelonephritis
- Bacterial angular cheilitis
- Abscess of aortic valve
- Erythema nodosum due to bacterial infection
- Bacterial infectious disease (disorder)
- Pleural effusion caused by bacteria
- Acute bacterial pyelonephritis
- Acute tubulointerstitial disease
- Bacterial oral infection
- Acute bacterial TIN (tubulointerstitial nephritis)
- Disease caused by Gram-negative bacteria
- Acute tubulo-interstitial nephritis
- Acute infectious tubulointerstitial nephritis
- Bacterial infection of central nervous system
- Gram-negative bacterial cellulitis
- Bacterial upper respiratory infection
- Acute bacterial otitis externa
- Bacterial otitis media
- Perlèche
- Bacterial abscess of mitral valve
- Bacterial infection NOS
- Superficial bacterial infection of skin
- Bacterial endophthalmitis
- Bacterial infection due to HIV infection
- Herpes zoster with secondary bacterial infection
- Bacterial abscess of pulmonary valve
- Infection bacterial
- APN - Acute pyelonephritis
- Infection of tendon sheath caused by bacterium
- Infection, Bacterial
- AIN - Acute interstitial nephritis
- Erythema nodosum caused by Bacteria
- Abscess of mitral valve
- Neonatal hyperbilirubinemia due to bacterial infection
- Bacterial oesophagitis
- Infection caused by quinolone and fluoroquinolone resistant bacteria
- Bacterial dermatological disorders
- Carbapenem resistant bacterial infection
- Acute bacterial tubulointerstitial nephritis
- Bacterial infection co-occurrent and due to herpes zoster
- Infection caused by multi drug resistant bacteria
- bacterial infectious diseases
- Bacterial folliculitis
- Bacterial encephalitis
- Recurrent bacterial infection
- Angular cheilitis
- Bacterial infectious disorders
Frequently Asked Questions
What is the ICD-10 code for bacterial infection, unspecified?
The ICD-10-CM code for bacterial infection, unspecified is A49.9. The full clinical description is "Bacterial infection, unspecified". A49.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code A49.9 mean?
ICD-10-CM code A49.9 represents “Bacterial infection, unspecified”. It is classified under Chapter 1: Certain Infectious and Parasitic Diseases and is a billable/specific code that can be used on a claim.
Is A49.9 a billable code?
Yes, A49.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is A49.9 in?
A49.9 is in Chapter 1: Certain Infectious and Parasitic Diseases (codes A00-B99).
What codes cannot be used with A49.9?
A49.9 has Excludes1 notes indicating codes that cannot be used together with it, including: certain localized infections - see body system-related chapters; bacterial agents as the cause of diseases classified elsewhere (B95-B96); chlamydial infection NOS (A74.9); and 4 more.
Are additional codes required with A49.9?
Yes, when using A49.9, also report: resistance to antimicrobial drugs (Z16.-).
What SNOMED CT codes does A49.9 map to?
A49.9 maps to 67 SNOMED CT concepts: 28637003, 36689008, 430065009, 430616003, 431238002, and 62 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for A49.9?
A49.9 is linked to 1 UMLS Concept Unique Identifier: C0004623. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does A49.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like bacterial infection, unspecified affect a person's functioning: body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of A49.9?
A49.9 maps to the ICD-11 code: 1C41 (Bacterial infection of unspecified site).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.