2026 ICD-10-CM Diagnosis Code Z81.2Family history of tobacco abuse and dependence
Z81.2 is a billable ICD-10-CM diagnosis code for family history of tobacco abuse and dependence. 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 and exempt from POA reporting. Coders also document this condition as both parents smoke. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Family history of disease.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for Z81.2.
Present on Admission (POA)Billing
Z81.2 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Both parents smoke
- Family history of harmful pattern of substance use
- Family history of smoking
- Father smokes
- H/O - maternal psychiatric problem
- Maternal history of harmful pattern of tobacco use
- Maternal substance abuse
- Mother smokes
- Smoker in the family
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Conditions classifiable to F17
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.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- History
- family (of) - See Also: History, personal (of);
- tobacco - Z81.2
- tobacco abuse - Z81.2
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- History
- family (of)
- substance abuse NEC
- tobacco
- History
- family (of)
- tobacco abuse
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Family History
Your family history includes health information about you and your close relatives. Families have many factors in common, including their genes, environment, and lifestyle. Looking at these factors can help you figure out whether you have a higher risk for certain health problems, such as heart disease, stroke, and cancer.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert Z81.2 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Z81.2Overview
Is Z81.2 (Family history of mental and behavioral disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report family history of tobacco abuse and dependence on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Can Z81.2 be a principal diagnosis?
No. The Medicare Code Editor rejects this code as a principal diagnosis because family history of tobacco abuse and dependence describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.
Is Z81.2 exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for family history of tobacco abuse and dependence on inpatient claims.
What is the ICD-9 equivalent of Z81.2?
Under the General Equivalence Mappings, family history of tobacco abuse and dependence converts to ICD-9-CM V19.8 (family hx-condition NEC). The mapping is approximate, so confirm the match fits the documentation.
