DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

A01 Typhoid and paratyphoid fevers

  • Header · not billable

A01 is not billable. The category heads 11 billable codes in FY2027, grouped under 5 subdivisions.

Index → code

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. A00-A09 Intestinal infectious diseases (A00-A09)
  3. A01 Typhoid and paratyphoid fevers
Billable codes
11
Subdivisions
5
CC / MCC codes
11 / 0
HCC V28 codes
2
New FY2027
0
Index entries
84

Codes in A01

  1. A01.0
    Typhoid fever
    Header
    Inclusion terms 1

    Inclusion terms

    • Infection due to Salmonella typhi
  2. A01.00
    Typhoid fever, unspecified
    BillableCC
  3. A01.01
    Typhoid meningitis
    BillableCC
  4. A01.02
    Typhoid fever with heart involvement
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Typhoid endocarditis
    • Typhoid myocarditis
  5. A01.03
    Typhoid pneumonia
    BillableCC
  6. A01.04
    Typhoid arthritis
    BillableCC92
  7. A01.05
    Typhoid osteomyelitis
    BillableCC92
  8. A01.09
    Typhoid fever with other complications
    BillableCC
  9. A01.1
    Paratyphoid fever A
    BillableCC
  10. A01.2
    Paratyphoid fever B
    BillableCC
  11. A01.3
    Paratyphoid fever C
    BillableCC
  12. A01.4
    Paratyphoid fever, unspecified
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Infection due to Salmonella paratyphi NOS

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

Notes that also apply

Chapter 1 instructions (Includes 1, Excludes2 5, Use additional code 1): printed on the chapter 1 page.

Index entries

  • Eberth's disease (typhoid fever) → A01.00
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative) → A01.00
  • Typhomania → A01.00
  • Post-typhoid abscess → A01.09
  • Typhoperitonitis → A01.09
  • Schottmuller's disease → A01.4
  • Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective)typhosa → A01.00
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)enteric → A01.00
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)gastroenteric → A01.00
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)typhogastric → A01.00
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)typhoid (abortive) (hemorrhagic) (intermittent) (malignant) → A01.00
  • Infection, infected, infective (opportunistic)Eberthella typhosa → A01.00
  • Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic)typhoid → A01.01
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)meningitis → A01.01
  • Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular)typhoid → A01.02
  • Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile)typhoid → A01.02
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)endocarditis → A01.02
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)heart involvement → A01.02
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)myocarditis → A01.02
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)with pneumonia → A01.03
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)pneumonia → A01.03
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)arthritis → A01.04
  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)typhoid → A01.05
  • Spondylitis (chronic)typhosa → A01.05
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)osteomyelitis → A01.05
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)spine → A01.05
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)post-typhoid → A01.09
  • Cholangiolitis (acute) (chronic) (extrahepatic) (gangrenous) (intrahepatic)typhoidal → A01.09
  • Cholecystitistyphoidal → A01.09
  • Choledocholithiasis (common duct) (hepatic duct)typhoidal → A01.09
  • Fistula (cutaneous)typhoid → A01.09
  • Rheumatic (acute) (subacute)typhoid fever → A01.09
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)abdominal → A01.09
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)cholecystitis (current) → A01.09
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)mesenteric lymph nodes → A01.09
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)perichondritis, larynx → A01.09
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)specified NEC → A01.09
  • Typhoid (abortive) (ambulant) (any site) (clinical) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) (Widal negative)ulcer (perforating) → A01.09
  • Cholecystitisparatyphoidal, current → A01.4
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)paratyphoid → A01.4

44 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy