DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

A36 Diphtheria

  • Header · not billable

A36 is not billable. The category heads 12 billable codes in FY2027, grouped under 6 subdivisions.

Index → code

  • Bretonneau's disease or angina → A36.0
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic) → A36.9
  • Cynanchediphtheritic → A36.2

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. A30-A49 Other bacterial diseases (A30-A49)
  3. A36 Diphtheria
Billable codes
12
Subdivisions
6
CC / MCC codes
12 / 0
HCC V28 codes
1
New FY2027
0
Index entries
55

Codes in A36

  1. A36.0
    Pharyngeal diphtheria
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Diphtheritic membranous angina
    • Tonsillar diphtheria
  2. A36.1
    Nasopharyngeal diphtheria
    BillableCC
  3. A36.2
    Laryngeal diphtheria
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Diphtheritic laryngotracheitis
  4. A36.3
    Cutaneous diphtheria
    BillableCC
    Excludes2 1

    Excludes2

  5. A36.8
    Other diphtheria
    Header
  6. A36.81
    Diphtheritic cardiomyopathy
    BillableCC227
    Inclusion terms 1

    Inclusion terms

    • Diphtheritic myocarditis
  7. A36.82
    Diphtheritic radiculomyelitis
    BillableCC
  8. A36.83
    Diphtheritic polyneuritis
    BillableCC
  9. A36.84
    Diphtheritic tubulo-interstitial nephropathy
    BillableCC
  10. A36.85
    Diphtheritic cystitis
    BillableCC
  11. A36.86
    Diphtheritic conjunctivitis
    BillableCC
  12. A36.89
    Other diphtheritic complications
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Diphtheritic peritonitis
  13. A36.9
    Diphtheria, unspecified
    BillableCC

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

  • Bretonneau's disease or angina → A36.0
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic) → A36.9
  • Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor)diphtheritic, membranous → A36.0
  • Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor)gangrenous diphtheritic → A36.0
  • Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor)malignant diphtheritic → A36.0
  • Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor)pultaceous, diphtheritic → A36.0
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic)faucial → A36.0
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic)pharyngeal → A36.0
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic)tonsillar → A36.0
  • Disease, diseasedBretonneau's (diphtheritic malignant angina) → A36.0
  • Pharyngitis (acute) (catarrhal)(gangrenous) (infective) (malignant) (membranous) (phlegmonous) (pseudomembranous) (simple) (subacute) (suppurative) (ulcerative)diphtheritic → A36.0
  • Tonsillitis (acute) (catarrhal) (croupous) (follicular) (gangrenous) (infective) (lacunar) (lingual) (malignant) (membranous) (parenchymatous) (phlegmonous) (pseudomembranous) (purulent) (septic) (subacute) (suppurative) (toxic) (ulcerative) (vesicular) (viral)diphtheritic → A36.0
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic)nasopharyngeal → A36.1
  • Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor)stridulous, diphtheritic → A36.2
  • Croup, croupous (catarrhal) (infectious) (inflammatory) (nondiphtheritic)diphtheritic → A36.2
  • Cynanchediphtheritic → A36.2
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic)laryngeal → A36.2
  • Laryngismus (stridulus)diphtheritic → A36.2
  • Laryngitis (acute) (edematous) (fibrinous) (infective) (infiltrative) (malignant) (membranous) (phlegmonous) (pneumococcal) (pseudomembranous) (septic) (subglottic) (suppurative) (ulcerative)diphtheritic → A36.2
  • Laryngotracheitis (acute) (Infectional) (infective) (viral)diphtheritic → A36.2
  • Dermatitis (eczematous)diphtheritica → A36.3
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic)cutaneous → A36.3
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic)infection of wound → A36.3
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic)myocarditis → A36.81
  • Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile)diphtheritic → A36.81
  • Polyneuritis, polyneuriticdiphtheritic → A36.83
  • Cystitis (exudative) (hemorrhagic) (septic) (suppurative)diphtheritic → A36.85
  • Conjunctivitis (staphylococcal) (streptococcal) NOSdiphtheritic → A36.86
  • Ophthalmiadiphtheritic → A36.86
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic)nasal, anterior → A36.89
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic)neurological complication → A36.89
  • Diphtheria, diphtheritic (gangrenous) (hemorrhagic)specified site NEC → A36.89
  • Peritonitis (adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion)diphtheritic → A36.89
  • Stomatitis (denture) (ulcerative)diphtheritic → A36.89
  • Tracheitis (catarrhal) (infantile) (membranous) (plastic) (septal) (suppurative) (viral)diphtheritic (membranous) → A36.89
  • Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor)membranousdiphtheritic → A36.0
  • Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor)phlegmonousdiphtheritic → A36.0
  • Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer)throatdiphtheritic → A36.0
  • Paralysis, paralytic (complete) (incomplete)throatdiphtheritic → A36.0
  • Paralysis, paralytic (complete) (incomplete)uvulapostdiphtheritic → A36.0

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

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

Hierarchy