ICD-10 · PDGM grouping

A30-A49 — Other bacterial diseases

Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.1.26.

OASIS-E2 v1.00.0 · ingested 2026-04-26

Codes in range

115

No clinical group

A period cannot be grouped from these.

Barred as primary

CMS rejects these in the primary position.

Where these codes group

100 of the 115 codes in A30-A49 group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases, but the range is not uniform — it spreads across 3 clinical groups. A further 7 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.

Every code in A30-A49

Descriptions are CMS’s own, abbreviated as CMS abbreviates them.

Code	Description	Clinical group	Primary position
A300	Indeterminate leprosy	K	Accepted
A301	Tuberculoid leprosy	K	Accepted
A302	Borderline tuberculoid leprosy	K	Accepted
A303	Borderline leprosy	K	Accepted
A304	Borderline lepromatous leprosy	K	Accepted
A305	Lepromatous leprosy	K	Accepted
A308	Other forms of leprosy	K	Accepted
A309	Leprosy, unspecified	K	Accepted
A310	Pulmonary mycobacterial infection	K	Accepted
A311	Cutaneous mycobacterial infection	K	Accepted
A312	Dissem mycobacterium avium-intracellulare complex (DMAC)	K	Accepted
A318	Other mycobacterial infections	K	Accepted
A319	Mycobacterial infection, unspecified	K	Accepted
A320	Cutaneous listeriosis	K	Accepted
A3211	Listerial meningitis	B	Accepted
A3212	Listerial meningoencephalitis	B	Accepted
A327	Listerial sepsis	K	Accepted
A3281	Oculoglandular listeriosis	K	Accepted
A3282	Listerial endocarditis	K	Accepted
A3289	Other forms of listeriosis	K	Accepted
A329	Listeriosis, unspecified	K	Accepted
A33	Tetanus neonatorum	K	Accepted
A34	Obstetrical tetanus	K	Accepted
A35	Other tetanus	K	Accepted
A360	Pharyngeal diphtheria	K	Accepted
A361	Nasopharyngeal diphtheria	K	Accepted
A362	Laryngeal diphtheria	K	Accepted
A363	Cutaneous diphtheria	K	Accepted
A3681	Diphtheritic cardiomyopathy	K	Accepted
A3682	Diphtheritic radiculomyelitis	K	Accepted
A3683	Diphtheritic polyneuritis	K	Accepted
A3684	Diphtheritic tubulo-interstitial nephropathy	K	Accepted
A3685	Diphtheritic cystitis	K	Accepted
A3686	Diphtheritic conjunctivitis	K	Accepted
A3689	Other diphtheritic complications	K	Accepted
A369	Diphtheria, unspecified	K	Accepted
A3700	Whooping cough due to Bordetella pertussis without pneumonia	K	Accepted
A3701	Whooping cough due to Bordetella pertussis with pneumonia	K	Accepted
A3710	Whooping cough due to Bordetella parapertussis w/o pneumonia	K	Accepted
A3711	Whooping cough due to Bordetella parapertussis w pneumonia	K	Accepted
A3780	Whooping cough due to other Bordetella species w/o pneumonia	K	Accepted
A3781	Whooping cough due to oth Bordetella species with pneumonia	K	Accepted
A3790	Whooping cough, unspecified species without pneumonia	K	Accepted
A3791	Whooping cough, unspecified species with pneumonia	K	Accepted
A380	Scarlet fever with otitis media	K	Accepted
A381	Scarlet fever with myocarditis	K	Accepted
A388	Scarlet fever with other complications	K	Accepted
A389	Scarlet fever, uncomplicated	K	Accepted
A390	Meningococcal meningitis	B	Accepted
A391	Waterhouse-Friderichsen syndrome	K	Accepted
A392	Acute meningococcemia	K	Accepted
A393	Chronic meningococcemia	K	Accepted
A394	Meningococcemia, unspecified	K	Accepted
A3950	Meningococcal carditis, unspecified	K	Accepted
A3951	Meningococcal endocarditis	K	Accepted
A3952	Meningococcal myocarditis	K	Accepted
A3953	Meningococcal pericarditis	K	Accepted
A3981	Meningococcal encephalitis	B	Accepted
A3982	Meningococcal retrobulbar neuritis	K	Accepted
A3983	Meningococcal arthritis	K	Accepted
A3984	Postmeningococcal arthritis	K	Accepted
A3989	Other meningococcal infections	K	Accepted
A399	Meningococcal infection, unspecified	K	Accepted
A400	Sepsis due to streptococcus, group A	K	Accepted
A401	Sepsis due to streptococcus, group B	K	Accepted
A403	Sepsis due to Streptococcus pneumoniae	K	Accepted
A408	Other streptococcal sepsis	K	Accepted
A409	Streptococcal sepsis, unspecified	K	Accepted
A4101	Sepsis due to Methicillin susceptible Staphylococcus aureus	K	Accepted
A4102	Sepsis due to Methicillin resistant Staphylococcus aureus	K	Accepted
A411	Sepsis due to other specified staphylococcus	K	Accepted
A412	Sepsis due to unspecified staphylococcus	K	Accepted
A413	Sepsis due to Hemophilus influenzae	K	Accepted
A414	Sepsis due to anaerobes	K	Accepted
A4150	Gram-negative sepsis, unspecified	K	Accepted
A4151	Sepsis due to Escherichia coli [E. coli]	K	Accepted
A4152	Sepsis due to Pseudomonas	K	Accepted
A4153	Sepsis due to Serratia	K	Accepted
A4154	Sepsis due to Acinetobacter baumannii	K	Accepted
A4159	Other Gram-negative sepsis	K	Accepted
A4181	Sepsis due to Enterococcus	K	Accepted
A4189	Other specified sepsis	K	Accepted
A419	Sepsis, unspecified organism	K	Accepted
A420	Pulmonary actinomycosis	K	Accepted
A421	Abdominal actinomycosis	K	Accepted
A422	Cervicofacial actinomycosis	K	Accepted
A427	Actinomycotic sepsis	K	Accepted
A4281	Actinomycotic meningitis	B	Accepted
A4282	Actinomycotic encephalitis	B	Accepted
A4289	Other forms of actinomycosis	K	Accepted
A429	Actinomycosis, unspecified	K	Accepted
A430	Pulmonary nocardiosis	K	Accepted
A431	Cutaneous nocardiosis	K	Accepted
A438	Other forms of nocardiosis	K	Accepted
A439	Nocardiosis, unspecified	K	Accepted
A440	Systemic bartonellosis	K	Accepted
A441	Cutaneous and mucocutaneous bartonellosis	K	Accepted
A448	Other forms of bartonellosis	K	Accepted
A449	Bartonellosis, unspecified	K	Accepted
A46	Erysipelas	K	Accepted
A480	Gas gangrene	C	Accepted
A481	Legionnaires' disease	K	Accepted
A482	Nonpneumonic Legionnaires' disease [Pontiac fever]	K	Accepted
A483	Toxic shock syndrome	K	Accepted
A484	Brazilian purpuric fever	K	Accepted
A4851	Infant botulism	K	Accepted
A4852	Wound botulism	C	Accepted
A488	Other specified bacterial diseases	K	Accepted
A4901	Methicillin suscep staph infection, unsp site	None	Cannot group
A4902	Methicillin resis staph infection, unsp site	None	Cannot group
A491	Streptococcal infection, unspecified site	None	Cannot group
A492	Hemophilus influenzae infection, unspecified site	None	Cannot group
A493	Mycoplasma infection, unspecified site	None	Cannot group
A498	Other bacterial infections of unspecified site	None	Cannot group
A499	Bacterial infection, unspecified	None	Cannot group

Source: CMS HH PPS Grouper Software v07.1.26, effective 2026-04-01. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.

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A30-A49 — Other bacterial diseases

Where these codes group

Every code in A30-A49

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