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 v07.2.26.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in range
115
No clinical group
7
A period cannot be grouped from these.
Barred as primary
0
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.
Code families in A30-A49
One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.
- A30Leprosy [Hansen's disease]8 codes
- A31Infection due to other mycobacteria5 codes
- A32Listeriosis8 codes
- A33Tetanus neonatorum1 code
- A34Obstetrical tetanus1 code
- A35Other tetanus1 code
- A36Diphtheria12 codes
- A37Whooping cough8 codes
- A38Scarlet fever4 codes
- A39Meningococcal infection15 codes
- A40Streptococcal sepsis5 codes
- A41Other sepsis15 codes
- A42Actinomycosis8 codes
- A43Nocardiosis4 codes
- A44Bartonellosis4 codes
- A46Erysipelas1 code
- A48Other bacterial diseases, not elsewhere classified8 codes
- A49Bacterial infection of unspecified site7 codes
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 | Can lead a claim |
| A301 | Tuberculoid leprosy | K | Can lead a claim |
| A302 | Borderline tuberculoid leprosy | K | Can lead a claim |
| A303 | Borderline leprosy | K | Can lead a claim |
| A304 | Borderline lepromatous leprosy | K | Can lead a claim |
| A305 | Lepromatous leprosy | K | Can lead a claim |
| A308 | Other forms of leprosy | K | Can lead a claim |
| A309 | Leprosy, unspecified | K | Can lead a claim |
| A310 | Pulmonary mycobacterial infection | K | Can lead a claim |
| A311 | Cutaneous mycobacterial infection | K | Can lead a claim |
| A312 | Dissem mycobacterium avium-intracellulare complex (DMAC) | K | Can lead a claim |
| A318 | Other mycobacterial infections | K | Can lead a claim |
| A319 | Mycobacterial infection, unspecified | K | Can lead a claim |
| A320 | Cutaneous listeriosis | K | Can lead a claim |
| A3211 | Listerial meningitis | B | Can lead a claim |
| A3212 | Listerial meningoencephalitis | B | Can lead a claim |
| A327 | Listerial sepsis | K | Can lead a claim |
| A3281 | Oculoglandular listeriosis | K | Can lead a claim |
| A3282 | Listerial endocarditis | K | Can lead a claim |
| A3289 | Other forms of listeriosis | K | Can lead a claim |
| A329 | Listeriosis, unspecified | K | Can lead a claim |
| A33 | Tetanus neonatorum | K | Can lead a claim |
| A34 | Obstetrical tetanus | K | Can lead a claim |
| A35 | Other tetanus | K | Can lead a claim |
| A360 | Pharyngeal diphtheria | K | Can lead a claim |
| A361 | Nasopharyngeal diphtheria | K | Can lead a claim |
| A362 | Laryngeal diphtheria | K | Can lead a claim |
| A363 | Cutaneous diphtheria | K | Can lead a claim |
| A3681 | Diphtheritic cardiomyopathy | K | Can lead a claim |
| A3682 | Diphtheritic radiculomyelitis | K | Can lead a claim |
| A3683 | Diphtheritic polyneuritis | K | Can lead a claim |
| A3684 | Diphtheritic tubulo-interstitial nephropathy | K | Can lead a claim |
| A3685 | Diphtheritic cystitis | K | Can lead a claim |
| A3686 | Diphtheritic conjunctivitis | K | Can lead a claim |
| A3689 | Other diphtheritic complications | K | Can lead a claim |
| A369 | Diphtheria, unspecified | K | Can lead a claim |
| A3700 | Whooping cough due to Bordetella pertussis without pneumonia | K | Can lead a claim |
| A3701 | Whooping cough due to Bordetella pertussis with pneumonia | K | Can lead a claim |
| A3710 | Whooping cough due to Bordetella parapertussis w/o pneumonia | K | Can lead a claim |
| A3711 | Whooping cough due to Bordetella parapertussis w pneumonia | K | Can lead a claim |
| A3780 | Whooping cough due to other Bordetella species w/o pneumonia | K | Can lead a claim |
| A3781 | Whooping cough due to oth Bordetella species with pneumonia | K | Can lead a claim |
| A3790 | Whooping cough, unspecified species without pneumonia | K | Can lead a claim |
| A3791 | Whooping cough, unspecified species with pneumonia | K | Can lead a claim |
| A380 | Scarlet fever with otitis media | K | Can lead a claim |
| A381 | Scarlet fever with myocarditis | K | Can lead a claim |
| A388 | Scarlet fever with other complications | K | Can lead a claim |
| A389 | Scarlet fever, uncomplicated | K | Can lead a claim |
| A390 | Meningococcal meningitis | B | Can lead a claim |
| A391 | Waterhouse-Friderichsen syndrome | K | Can lead a claim |
| A392 | Acute meningococcemia | K | Can lead a claim |
| A393 | Chronic meningococcemia | K | Can lead a claim |
| A394 | Meningococcemia, unspecified | K | Can lead a claim |
| A3950 | Meningococcal carditis, unspecified | K | Can lead a claim |
| A3951 | Meningococcal endocarditis | K | Can lead a claim |
| A3952 | Meningococcal myocarditis | K | Can lead a claim |
| A3953 | Meningococcal pericarditis | K | Can lead a claim |
| A3981 | Meningococcal encephalitis | B | Can lead a claim |
| A3982 | Meningococcal retrobulbar neuritis | K | Can lead a claim |
| A3983 | Meningococcal arthritis | K | Can lead a claim |
| A3984 | Postmeningococcal arthritis | K | Can lead a claim |
| A3989 | Other meningococcal infections | K | Can lead a claim |
| A399 | Meningococcal infection, unspecified | K | Can lead a claim |
| A400 | Sepsis due to streptococcus, group A | K | Can lead a claim, code first applies |
| A401 | Sepsis due to streptococcus, group B | K | Can lead a claim, code first applies |
| A403 | Sepsis due to Streptococcus pneumoniae | K | Can lead a claim, code first applies |
| A408 | Other streptococcal sepsis | K | Can lead a claim, code first applies |
| A409 | Streptococcal sepsis, unspecified | K | Can lead a claim, code first applies |
| A4101 | Sepsis due to Methicillin susceptible Staphylococcus aureus | K | Can lead a claim, code first applies |
| A4102 | Sepsis due to Methicillin resistant Staphylococcus aureus | K | Can lead a claim, code first applies |
| A411 | Sepsis due to other specified staphylococcus | K | Can lead a claim, code first applies |
| A412 | Sepsis due to unspecified staphylococcus | K | Can lead a claim, code first applies |
| A413 | Sepsis due to Hemophilus influenzae | K | Can lead a claim, code first applies |
| A414 | Sepsis due to anaerobes | K | Can lead a claim, code first applies |
| A4150 | Gram-negative sepsis, unspecified | K | Can lead a claim, code first applies |
| A4151 | Sepsis due to Escherichia coli [E. coli] | K | Can lead a claim, code first applies |
| A4152 | Sepsis due to Pseudomonas | K | Can lead a claim, code first applies |
| A4153 | Sepsis due to Serratia | K | Can lead a claim, code first applies |
| A4154 | Sepsis due to Acinetobacter baumannii | K | Can lead a claim, code first applies |
| A4159 | Other Gram-negative sepsis | K | Can lead a claim, code first applies |
| A4181 | Sepsis due to Enterococcus | K | Can lead a claim, code first applies |
| A4189 | Other specified sepsis | K | Can lead a claim, code first applies |
| A419 | Sepsis, unspecified organism | K | Can lead a claim, code first applies |
| A420 | Pulmonary actinomycosis | K | Can lead a claim |
| A421 | Abdominal actinomycosis | K | Can lead a claim |
| A422 | Cervicofacial actinomycosis | K | Can lead a claim |
| A427 | Actinomycotic sepsis | K | Can lead a claim |
| A4281 | Actinomycotic meningitis | B | Can lead a claim |
| A4282 | Actinomycotic encephalitis | B | Can lead a claim |
| A4289 | Other forms of actinomycosis | K | Can lead a claim |
| A429 | Actinomycosis, unspecified | K | Can lead a claim |
| A430 | Pulmonary nocardiosis | K | Can lead a claim |
| A431 | Cutaneous nocardiosis | K | Can lead a claim |
| A438 | Other forms of nocardiosis | K | Can lead a claim |
| A439 | Nocardiosis, unspecified | K | Can lead a claim |
| A440 | Systemic bartonellosis | K | Can lead a claim |
| A441 | Cutaneous and mucocutaneous bartonellosis | K | Can lead a claim |
| A448 | Other forms of bartonellosis | K | Can lead a claim |
| A449 | Bartonellosis, unspecified | K | Can lead a claim |
| A46 | Erysipelas | K | Can lead a claim |
| A480 | Gas gangrene | C | Can lead a claim |
| A481 | Legionnaires' disease | K | Can lead a claim |
| A482 | Nonpneumonic Legionnaires' disease [Pontiac fever] | K | Can lead a claim |
| A483 | Toxic shock syndrome | K | Can lead a claim |
| A484 | Brazilian purpuric fever | K | Can lead a claim |
| A4851 | Infant botulism | K | Can lead a claim |
| A4852 | Wound botulism | C | Can lead a claim |
| A488 | Other specified bacterial diseases | K | Can lead a claim |
| A4901 | Methicillin suscep staph infection, unsp site | None | Cannot lead a claim |
| A4902 | Methicillin resis staph infection, unsp site | None | Cannot lead a claim |
| A491 | Streptococcal infection, unspecified site | None | Cannot lead a claim |
| A492 | Hemophilus influenzae infection, unspecified site | None | Cannot lead a claim |
| A493 | Mycoplasma infection, unspecified site | None | Cannot lead a claim |
| A498 | Other bacterial infections of unspecified site | None | Cannot lead a claim |
| A499 | Bacterial infection, unspecified | None | Cannot lead a claim |
Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. 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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