A30-A49Not billable, use a more specific code below
Other bacterial diseases (A30-A49)
chapter 1: Certain Infectious and Parasitic Diseases
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Rules for coding infections and parasitic diseases, including HIV, organism and drug resistance codes, sepsis and septic shock, MRSA, Zika, and COVID-19.
- Human Immunodeficiency Virus (HIV) Infections (page 19)
- Infectious agents as the cause of diseases classified to other chapters (page 22)
- Infections resistant to antibiotics (page 22)
- Sepsis, Severe Sepsis, and Septic Shock (page 23)
- Methicillin Resistant Staphylococcus aureus (MRSA) Conditions (page 27)
- Zika virus infections (page 28)
- Coronavirus infections (page 28)
All codes under A30-A49
A30-A49 can't be used on a claim. Pick a billable code below; grey headings group them.
- A30Leprosy [Hansen's disease]
- A30.0Indeterminate leprosy
- A30.1Tuberculoid leprosy
- A30.2Borderline tuberculoid leprosy
- A30.3Borderline leprosy
- A30.4Borderline lepromatous leprosy
- A30.5Lepromatous leprosy
- A30.8Other forms of leprosy
- A30.9Leprosy, unspecified
- A31Infection due to other mycobacteria
- A31.0Pulmonary mycobacterial infection
- A31.1Cutaneous mycobacterial infection
- A31.2Disseminated mycobacterium avium-intracellulare complex (DMAC)
- A31.8Other mycobacterial infections
- A31.9Mycobacterial infection, unspecified
- A32Listeriosis
- A32.0Cutaneous listeriosis
- A32.1Listerial meningitis and meningoencephalitis
- A32.11Listerial meningitis
- A32.12Listerial meningoencephalitis
- A32.7Listerial sepsis
- A32.8Other forms of listeriosis
- A32.81Oculoglandular listeriosis
- A32.82Listerial endocarditis
- A32.89Other forms of listeriosis
- A32.9Listeriosis, unspecified
- A33Tetanus neonatorum
- A34Obstetrical tetanus
- A35Other tetanus
- A36Diphtheria
- A36.0Pharyngeal diphtheria
- A36.1Nasopharyngeal diphtheria
- A36.2Laryngeal diphtheria
- A36.3Cutaneous diphtheria
- A36.8Other diphtheria
- A36.81Diphtheritic cardiomyopathy
- A36.82Diphtheritic radiculomyelitis
- A36.83Diphtheritic polyneuritis
- A36.84Diphtheritic tubulo-interstitial nephropathy
- A36.85Diphtheritic cystitis
- A36.86Diphtheritic conjunctivitis
- A36.89Other diphtheritic complications
- A36.9Diphtheria, unspecified
- A37Whooping cough
- A37.0Whooping cough due to Bordetella pertussis
- A37.00Whooping cough due to Bordetella pertussis without pneumonia
- A37.01Whooping cough due to Bordetella pertussis with pneumonia
- A37.1Whooping cough due to Bordetella parapertussis
- A37.10Whooping cough due to Bordetella parapertussis without pneumonia
- A37.11Whooping cough due to Bordetella parapertussis with pneumonia
- A37.8Whooping cough due to other Bordetella species
- A37.80Whooping cough due to other Bordetella species without pneumonia
- A37.81Whooping cough due to other Bordetella species with pneumonia
- A37.9Whooping cough, unspecified species
- A37.90Whooping cough, unspecified species without pneumonia
- A37.91Whooping cough, unspecified species with pneumonia
- A38Scarlet fever
- A38.0Scarlet fever with otitis media
- A38.1Scarlet fever with myocarditis
- A38.8Scarlet fever with other complications
- A38.9Scarlet fever, uncomplicated
- A39Meningococcal infection
- A39.0Meningococcal meningitis
- A39.1Waterhouse-Friderichsen syndrome
- A39.2Acute meningococcemia
- A39.3Chronic meningococcemia
- A39.4Meningococcemia, unspecified
- A39.5Meningococcal heart disease
- A39.50Meningococcal carditis, unspecified
- A39.51Meningococcal endocarditis
- A39.52Meningococcal myocarditis
- A39.53Meningococcal pericarditis
- A39.8Other meningococcal infections
- A39.81Meningococcal encephalitis
- A39.82Meningococcal retrobulbar neuritis
- A39.83Meningococcal arthritis
- A39.84Postmeningococcal arthritis
- A39.89Other meningococcal infections
- A39.9Meningococcal infection, unspecified
- A40Streptococcal sepsis
- A40.0Sepsis due to streptococcus, group A
- A40.1Sepsis due to streptococcus, group B
- A40.3Sepsis due to Streptococcus pneumoniae
- A40.8Other streptococcal sepsis
- A40.9Streptococcal sepsis, unspecified
- A41Other sepsis
- A41.0Sepsis due to Staphylococcus aureus
- A41.01Sepsis due to Methicillin susceptible Staphylococcus aureus
- A41.02Sepsis due to Methicillin resistant Staphylococcus aureus
- A41.1Sepsis due to other specified staphylococcus
- A41.2Sepsis due to unspecified staphylococcus
- A41.3Sepsis due to Hemophilus influenzae
- A41.4Sepsis due to anaerobes
- A41.5Sepsis due to other Gram-negative organisms
- A41.50Gram-negative sepsis, unspecified
- A41.51Sepsis due to Escherichia coli [E. coli]
- A41.52Sepsis due to Pseudomonas
- A41.53Sepsis due to Serratia
- A41.54Sepsis due to Acinetobacter baumannii
- A41.59Other Gram-negative sepsis
- A41.8Other specified sepsis
- A41.81Sepsis due to Enterococcus
- A41.89Other specified sepsis
- A41.9Sepsis, unspecified organism
- A42Actinomycosis
- A42.0Pulmonary actinomycosis
- A42.1Abdominal actinomycosis
- A42.2Cervicofacial actinomycosis
- A42.7Actinomycotic sepsis
- A42.8Other forms of actinomycosis
- A42.81Actinomycotic meningitis
- A42.82Actinomycotic encephalitis
- A42.89Other forms of actinomycosis
- A42.9Actinomycosis, unspecified
- A43Nocardiosis
- A43.0Pulmonary nocardiosis
- A43.1Cutaneous nocardiosis
- A43.8Other forms of nocardiosis
- A43.9Nocardiosis, unspecified
- A44Bartonellosis
- A44.0Systemic bartonellosis
- A44.1Cutaneous and mucocutaneous bartonellosis
- A44.8Other forms of bartonellosis
- A44.9Bartonellosis, unspecified
- A46Erysipelas
- A48Other bacterial diseases, not elsewhere classified
- A48.0Gas gangrene
- A48.1Legionnaires' disease
- A48.2Nonpneumonic Legionnaires' disease [Pontiac fever]
- A48.3Toxic shock syndrome
- A48.4Brazilian purpuric fever
- A48.5Other specified botulism
- A48.51Infant botulism
- A48.52Wound botulism
- A48.8Other specified bacterial diseases
- A49Bacterial infection of unspecified site
- A49.0Staphylococcal infection, unspecified site
- A49.01Methicillin susceptible Staphylococcus aureus infection, unspecified site
- A49.02Methicillin resistant Staphylococcus aureus infection, unspecified site
- A49.1Streptococcal infection, unspecified site
- A49.2Hemophilus influenzae infection, unspecified site
- A49.3Mycoplasma infection, unspecified site
- A49.8Other bacterial infections of unspecified site
- A49.9Bacterial infection, unspecified
A30-A49 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Mycobacterial Infections
Mycobacteria are a type of germ. There are many different kinds. The most common one causes tuberculosis. Another one causes leprosy. Still others cause infections that are called atypical mycobacterial infections. They aren't "typical" because they don't cause tuberculosis. But they can still harm people, especially people with other problems that affect their immunity, such as AIDS.
Read more about mycobacterial infections on MedlinePlus