A36: Diphtheria
Codes under A36 (Diphtheria). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| A36.0 | Pharyngeal diphtheria | ✓ |
| A36.0 | Pharyngeal diphtheria | ✓ |
| A36.1 | Nasopharyngeal diphtheria | ✓ |
| A36.1 | Nasopharyngeal diphtheria | ✓ |
| A36.2 | Laryngeal diphtheria | ✓ |
| A36.2 | Laryngeal diphtheria | ✓ |
| A36.3 | Cutaneous diphtheria | ✓ |
| A36.3 | Cutaneous diphtheria | ✓ |
| A36.8 | Other diphtheria | — |
| A36.8 | Other diphtheria | — |
| A36.9 | Diphtheria, unspecified | ✓ |
| A36.9 | Diphtheria, unspecified | ✓ |
| A36.81 | Diphtheritic cardiomyopathy | ✓ |
| A36.81 | Diphtheritic cardiomyopathy | ✓ |
| A36.82 | Diphtheritic radiculomyelitis | ✓ |
| A36.82 | Diphtheritic radiculomyelitis | ✓ |
| A36.83 | Diphtheritic polyneuritis | ✓ |
| A36.83 | Diphtheritic polyneuritis | ✓ |
| A36.84 | Diphtheritic tubulo-interstitial nephropathy | ✓ |
| A36.84 | Diphtheritic tubulo-interstitial nephropathy | ✓ |
| A36.85 | Diphtheritic cystitis | ✓ |
| A36.85 | Diphtheritic cystitis | ✓ |
| A36.86 | Diphtheritic conjunctivitis | ✓ |
| A36.86 | Diphtheritic conjunctivitis | ✓ |
| A36.89 | Other diphtheritic complications | ✓ |
| A36.89 | Other diphtheritic complications | ✓ |
Frequently asked questions
What is ICD-10-CM code A36?
A36 is an ICD-10-CM category covering Diphtheria. It contains 26 more specific diagnosis codes, 24 of which are billable.
Is A36 a billable code?
No — A36 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example A36.0 — Pharyngeal diphtheria). 24 of the 26 codes under A36 are billable.
What codes fall under A36?
A36 includes A36.0, A36.0, A36.1, A36.1, A36.2, plus 21 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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