2026 ICD-10-CM Diagnosis Code Z77.22Contact with and (suspected) exposure to environmental tobacco smoke (acute) (chronic)
Z77.22 is a billable ICD-10-CM diagnosis code for contact with and (suspected) exposure to environmental tobacco smoke (acute) (chronic). It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified status.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for Z77.22.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Exposed to tobacco smoke at home
- Exposed to tobacco smoke at work
- Exposed to tobacco smoke in public places
- Exposure to second hand tobacco smoke
- History of exposure to second hand smoke
- Non-smoker's second hand smoke syndrome
- Passive smoker
- Poisoning caused by smoke
- Smoker in home
- Toxic effect of secondary tobacco exposure
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Exposure to second hand tobacco smoke (acute) (chronic)
- Passive smoking (acute) (chronic)
Type 1 Excludes
Type 2 Excludes
- occupational exposure to environmental tobacco smoke Z57.31
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Exposure (to) - See Also: Contact, with; - T75.89
- second hand tobacco smoke (acute) (chronic) - Z77.22
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Exposure(to)
- environmental tobacco smoke (acute) (chronic)
- Exposure(to)
- second hand tobacco smoke (acute) (chronic)
- Passive
- smoking
- Second hand tobacco smoke exposure(acute) (chronic)
- Smoking
- passive
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Convert Z77.22 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Z77.22Overview
Is Z77.22 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report contact with and (suspected) exposure to environmental tobacco smoke (acute) (chronic) on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Can Z77.22 be a principal diagnosis?
No. The Medicare Code Editor rejects this code as a principal diagnosis because contact with and (suspected) exposure to environmental tobacco smoke (acute) (chronic) describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.
What is the ICD-9 equivalent of Z77.22?
Under the General Equivalence Mappings, contact with and (suspected) exposure to environmental tobacco smoke (acute) (chronic) converts to ICD-9-CM V15.89 (hx-health hazards NEC). The mapping is approximate, so confirm the match fits the documentation.
