Other bacterial diseases (A30-A49)
ICD-10 codes A30-A49 classify a range of other bacterial diseases caused by various bacteria including mycobacteria, Listeria, and staphylococci. These codes are used to specify infections like leprosy, listeriosis, tetanus, diphtheria, whooping cough, and diverse sepsis cases, helping to accurately identify and document these distinct bacterial conditions for clinical and coding purposes.
This code chapter covers diseases such as leprosy (A30), including types like tuberculoid and lepromatous leprosy; infections by other mycobacteria (A31) including pulmonary and cutaneous forms; and listeriosis (A32), with manifestations like meningitis and sepsis. It also details tetanus (A33-A35), categorized by neonatal, obstetrical, and other forms. Diphtheria codes (A36) address pharyngeal and cutaneous infections along with related complications. The range continues with whooping cough (A37) due to various Bordetella species and scarlet fever (A38). Additionally, meningococcal infections (A39), streptococcal and staphylococcal sepsis (A40-A41), and other serious bacterial diseases like actinomycosis, nocardiosis, bartonellosis, erysipelas, legionnaires' disease, and toxic shock syndrome are included. The codes also cover unspecified bacterial infections (A49) for unclear site or organism, aiding precision in medical documentation and billing.
- Leprosy [Hansen's disease] (A30)
- Infection due to other mycobacteria (A31)
- Listeriosis (A32)
- Tetanus neonatorum (A33)
- Obstetrical tetanus (A34)
- Other tetanus (A35)
- Diphtheria (A36)
- Whooping cough (A37)
- Scarlet fever (A38)
- Meningococcal infection (A39)
- Streptococcal sepsis (A40)
- Other sepsis (A41)
- Actinomycosis (A42)
- Nocardiosis (A43)
- Bartonellosis (A44)
- Erysipelas (A46)
- Other bacterial diseases, not elsewhere classified (A48)
- Bacterial infection of unspecified site (A49)
Certain infectious and parasitic diseases (A00–B99)
Other bacterial diseases (A30-A49)
A31 Infection due to other mycobacteria
- A31.0 Pulmonary mycobacterial infection
- A31.1 Cutaneous mycobacterial infection
- A31.2 Disseminated mycobacterium avium-intracellulare complex (DMAC)
- A31.8 Other mycobacterial infections
- A31.9 Mycobacterial infection, unspecified
Infection due to other mycobacteria (A31)
A32 Listeriosis
- A32.0 Cutaneous listeriosis
A32.1 Listerial meningitis and meningoencephalitis
- A32.11 Listerial meningitis
- A32.12 Listerial meningoencephalitis
- A32.7 Listerial sepsis
A32.8 Other forms of listeriosis
- A32.81 Oculoglandular listeriosis
- A32.82 Listerial endocarditis
- A32.89 Other forms of listeriosis
- A32.9 Listeriosis, unspecified
Listeriosis (A32)
- A33 Tetanus neonatorum
Tetanus neonatorum (A33)
- A34 Obstetrical tetanus
Obstetrical tetanus (A34)
- A35 Other tetanus
Other tetanus (A35)
A36 Diphtheria
- A36.0 Pharyngeal diphtheria
- A36.1 Nasopharyngeal diphtheria
- A36.2 Laryngeal diphtheria
- A36.3 Cutaneous diphtheria
A36.8 Other diphtheria
- A36.81 Diphtheritic cardiomyopathy
- A36.82 Diphtheritic radiculomyelitis
- A36.83 Diphtheritic polyneuritis
- A36.84 Diphtheritic tubulo-interstitial nephropathy
- A36.85 Diphtheritic cystitis
- A36.86 Diphtheritic conjunctivitis
- A36.89 Other diphtheritic complications
- A36.9 Diphtheria, unspecified
Diphtheria (A36)
A37 Whooping cough
A37.0 Whooping cough due to Bordetella pertussis
- A37.00 Whooping cough due to Bordetella pertussis without pneumonia
- A37.01 Whooping cough due to Bordetella pertussis with pneumonia
A37.1 Whooping cough due to Bordetella parapertussis
- A37.10 Whooping cough due to Bordetella parapertussis without pneumonia
- A37.11 Whooping cough due to Bordetella parapertussis with pneumonia
A37.8 Whooping cough due to other Bordetella species
- A37.80 Whooping cough due to other Bordetella species without pneumonia
- A37.81 Whooping cough due to other Bordetella species with pneumonia
A37.9 Whooping cough, unspecified species
- A37.90 Whooping cough, unspecified species without pneumonia
- A37.91 Whooping cough, unspecified species with pneumonia
Whooping cough (A37)
A39 Meningococcal infection
- A39.0 Meningococcal meningitis
- A39.1 Waterhouse-Friderichsen syndrome
- A39.2 Acute meningococcemia
- A39.3 Chronic meningococcemia
- A39.4 Meningococcemia, unspecified
A39.5 Meningococcal heart disease
- A39.50 Meningococcal carditis, unspecified
- A39.51 Meningococcal endocarditis
- A39.52 Meningococcal myocarditis
- A39.53 Meningococcal pericarditis
A39.8 Other meningococcal infections
- A39.81 Meningococcal encephalitis
- A39.82 Meningococcal retrobulbar neuritis
- A39.83 Meningococcal arthritis
- A39.84 Postmeningococcal arthritis
- A39.89 Other meningococcal infections
- A39.9 Meningococcal infection, unspecified
Meningococcal infection (A39)
A41 Other sepsis
A41.0 Sepsis due to Staphylococcus aureus
- A41.01 Sepsis due to Methicillin susceptible Staphylococcus aureus
- A41.02 Sepsis due to Methicillin resistant Staphylococcus aureus
- A41.1 Sepsis due to other specified staphylococcus
- A41.2 Sepsis due to unspecified staphylococcus
- A41.3 Sepsis due to Hemophilus influenzae
- A41.4 Sepsis due to anaerobes
A41.5 Sepsis due to other Gram-negative organisms
- A41.50 Gram-negative sepsis, unspecified
- A41.51 Sepsis due to Escherichia coli [E. coli]
- A41.52 Sepsis due to Pseudomonas
- A41.53 Sepsis due to Serratia
- A41.54 Sepsis due to Acinetobacter baumannii
- A41.59 Other Gram-negative sepsis
A41.8 Other specified sepsis
- A41.81 Sepsis due to Enterococcus
- A41.89 Other specified sepsis
- A41.9 Sepsis, unspecified organism
Other sepsis (A41)
A42 Actinomycosis
- A42.0 Pulmonary actinomycosis
- A42.1 Abdominal actinomycosis
- A42.2 Cervicofacial actinomycosis
- A42.7 Actinomycotic sepsis
A42.8 Other forms of actinomycosis
- A42.81 Actinomycotic meningitis
- A42.82 Actinomycotic encephalitis
- A42.89 Other forms of actinomycosis
- A42.9 Actinomycosis, unspecified
Actinomycosis (A42)
- A46 Erysipelas
Erysipelas (A46)
A48 Other bacterial diseases, not elsewhere classified
- A48.0 Gas gangrene
- A48.1 Legionnaires' disease
- A48.2 Nonpneumonic Legionnaires' disease [Pontiac fever]
- 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
Other bacterial diseases, not elsewhere classified (A48)
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
Bacterial infection of unspecified site (A49)
