A35 — Other tetanus
Is A35 billable?
Yes — A35 is billable for FY2027. A35 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. A35 may be submitted for encounters from October 1, 2026 through September 30, 2027.
A35 at a glance
| Code | A35 |
|---|---|
| Description | Other tetanus |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does A35 group to?
A35 sits in MDC 15 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 791Prematurity with Major Problemsmedical
As a secondary diagnosis, A35 is a major complication or comorbidity (MCC), which can move a stay into a higher-paying DRG.
How is A35 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to A35. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Tetanus, tetanic (cephalic) (convulsions)
- Radiculomyelitis › toxic, due to › Clostridium tetani
Excludes1 — never code together
The conditions below can never be reported together with A35 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Inclusion terms
Alternative wording in documentation that is classified to A35.
- Tetanus NOS
Use additional code — inherited from Chapter 1
Report an additional code alongside A35 to fully describe the condition. A35 is sequenced first.
- code to identify resistance to antimicrobial drugs (Z16.-)
Excludes2 — not included here — inherited from Chapter 1
The conditions below are not part of A35, but a patient may have both at the same time. When documentation supports it, A35 and the excluded code may both be reported.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
How long has A35 existed?
A35 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with A35?
ICD-10-CM declares these codes mutually exclusive with A35 — exactly one of each pair can be correct for a given encounter.