Chapter 1
Range: A00-B99
FY2027 Dataset
ICD-10-CM Chapter 1: Certain infectious and parasitic diseases (A00-B99)
Infections caused by bacteria, viruses, parasites, fungi, and other communicable agents.
Key Diagnosis Codes in Chapter 1
Verified against active FY2027 CDC NCHS code tables.
Showing active FY2027 codes
| Code | Official Descriptor | Status | Action |
|---|---|---|---|
| A00.0 |
Cholera due to Vibrio cholerae 01, biovar cholerae
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|
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| A00.1 |
Cholera due to Vibrio cholerae 01, biovar eltor
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|
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| A00.9 |
Cholera, unspecified
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|
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| A01.00 |
Typhoid fever, unspecified
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|
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| A01.01 |
Typhoid meningitis
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|
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| A01.02 |
Typhoid fever with heart involvement
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|
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| A01.03 |
Typhoid pneumonia
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|
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| A01.04 |
Typhoid arthritis
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|
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| A01.05 |
Typhoid osteomyelitis
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|
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| A01.09 |
Typhoid fever with other complications
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|
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| A01.1 |
Paratyphoid fever A
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|
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| A01.2 |
Paratyphoid fever B
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|
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| A01.3 |
Paratyphoid fever C
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|
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| A01.4 |
Paratyphoid fever, unspecified
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|
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| A02.0 |
Salmonella enteritis
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|
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| A02.1 |
Salmonella sepsis
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|
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| A02.20 |
Localized salmonella infection, unspecified
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|
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| A02.21 |
Salmonella meningitis
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|
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| A02.22 |
Salmonella pneumonia
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|
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| A02.23 |
Salmonella arthritis
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|
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| A02.24 |
Salmonella osteomyelitis
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|
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| A02.25 |
Salmonella pyelonephritis
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|
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| A02.29 |
Salmonella with other localized infection
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|
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| A02.8 |
Other specified salmonella infections
...
|
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| A02.9 |
Salmonella infection, unspecified
...
|
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| A03.0 |
Shigellosis due to Shigella dysenteriae
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|
Billable Code | View Code |
| A03.1 |
Shigellosis due to Shigella flexneri
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|
Billable Code | View Code |
| A03.2 |
Shigellosis due to Shigella boydii
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|
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| A03.3 |
Shigellosis due to Shigella sonnei
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|
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| A03.8 |
Other shigellosis
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|
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| A03.9 |
Shigellosis, unspecified
...
|
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| A04.0 |
Enteropathogenic Escherichia coli infection
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|
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| A04.1 |
Enterotoxigenic Escherichia coli infection
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|
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| A04.2 |
Enteroinvasive Escherichia coli infection
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|
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| A04.3 |
Enterohemorrhagic Escherichia coli infection
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|
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| A04.4 |
Other intestinal Escherichia coli infections
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|
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| A04.5 |
Campylobacter enteritis
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|
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| A04.6 |
Enteritis due to Yersinia enterocolitica
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|
Billable Code | View Code |
| A04.71 |
Enterocolitis due to Clostridium difficile, recurrent
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|
Billable Code | View Code |
| A04.72 |
Enterocolitis d/t Clostridium difficile, not spcf as recur
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|
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| A04.8 |
Other specified bacterial intestinal infections
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|
Billable Code | View Code |
| A04.9 |
Bacterial intestinal infection, unspecified
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|
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| A05.0 |
Foodborne staphylococcal intoxication
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|
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| A05.1 |
Botulism food poisoning
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|
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| A05.2 |
Foodborne Clostridium perfringens intoxication
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|
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| A05.3 |
Foodborne Vibrio parahaemolyticus intoxication
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|
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| A05.4 |
Foodborne Bacillus cereus intoxication
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|
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| A05.5 |
Foodborne Vibrio vulnificus intoxication
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|
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| A05.8 |
Other specified bacterial foodborne intoxications
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|
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| A05.9 |
Bacterial foodborne intoxication, unspecified
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|
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| A06.0 |
Acute amebic dysentery
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|
Billable Code | View Code |
| A06.1 |
Chronic intestinal amebiasis
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|
Billable Code | View Code |
| A06.2 |
Amebic nondysenteric colitis
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|
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| A06.3 |
Ameboma of intestine
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|
Billable Code | View Code |
| A06.4 |
Amebic liver abscess
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|
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| A06.5 |
Amebic lung abscess
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|
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| A06.6 |
Amebic brain abscess
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|
Billable Code | View Code |
| A06.7 |
Cutaneous amebiasis
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|
Billable Code | View Code |
| A06.81 |
Amebic cystitis
...
|
Billable Code | View Code |
| A06.82 |
Other amebic genitourinary infections
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|
Billable Code | View Code |
| A06.89 |
Other amebic infections
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|
Billable Code | View Code |
| A06.9 |
Amebiasis, unspecified
...
|
Billable Code | View Code |
| A07.0 |
Balantidiasis
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|
Billable Code | View Code |
| A07.1 |
Giardiasis [lambliasis]
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|
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| A07.2 |
Cryptosporidiosis
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|
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| A07.3 |
Isosporiasis
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|
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| A07.4 |
Cyclosporiasis
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|
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| A07.8 |
Other specified protozoal intestinal diseases
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|
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| A07.9 |
Protozoal intestinal disease, unspecified
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|
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| A08.0 |
Rotaviral enteritis
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|
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| A08.11 |
Acute gastroenteropathy due to Norwalk agent
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|
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| A08.19 |
Acute gastroenteropathy due to other small round viruses
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|
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| A08.2 |
Adenoviral enteritis
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|
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| A08.31 |
Calicivirus enteritis
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|
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| A08.32 |
Astrovirus enteritis
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|
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| A08.39 |
Other viral enteritis
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|
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| A08.4 |
Viral intestinal infection, unspecified
...
|
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| A08.8 |
Other specified intestinal infections
...
|
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| A09 |
Infectious gastroenteritis and colitis, unspecified
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|
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| A15.0 |
Tuberculosis of lung
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|
Billable Code | View Code |
| A15.4 |
Tuberculosis of intrathoracic lymph nodes
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|
Billable Code | View Code |
| A15.5 |
Tuberculosis of larynx, trachea and bronchus
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|
Billable Code | View Code |
| A15.6 |
Tuberculous pleurisy
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|
Billable Code | View Code |
| A15.7 |
Primary respiratory tuberculosis
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|
Billable Code | View Code |
| A15.8 |
Other respiratory tuberculosis
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|
Billable Code | View Code |
| A15.9 |
Respiratory tuberculosis unspecified
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|
Billable Code | View Code |
| A17.0 |
Tuberculous meningitis
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|
Billable Code | View Code |
| A17.1 |
Meningeal tuberculoma
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|
Billable Code | View Code |
| A17.81 |
Tuberculoma of brain and spinal cord
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|
Billable Code | View Code |
| A17.82 |
Tuberculous meningoencephalitis
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|
Billable Code | View Code |
| A17.83 |
Tuberculous neuritis
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|
Billable Code | View Code |
| A17.89 |
Other tuberculosis of nervous system
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|
Billable Code | View Code |
| A17.9 |
Tuberculosis of nervous system, unspecified
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|
Billable Code | View Code |
| A18.01 |
Tuberculosis of spine
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|
Billable Code | View Code |
| A18.02 |
Tuberculous arthritis of other joints
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|
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| A18.03 |
Tuberculosis of other bones
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|
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| A18.09 |
Other musculoskeletal tuberculosis
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|
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| A18.10 |
Tuberculosis of genitourinary system, unspecified
...
|
Billable Code | View Code |
| A18.11 |
Tuberculosis of kidney and ureter
...
|
Billable Code | View Code |
| A18.12 |
Tuberculosis of bladder
...
|
Billable Code | View Code |
Chapter Guidelines
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