2027 ICD-10-CM Diagnosis Code Z81.8Family history of other mental and behavioral disorders
Z81.8 is a billable ICD-10-CM diagnosis code for family history of other mental and behavioral disorders. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 795, 951. The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. 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 Z81.8.
Present on Admission (POA)Billing
Z81.8 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Family history of affective disorder
- Family history of amnesia
- Family history of anorexia nervosa
- Family history of attention deficit hyperactivity disorder
- Family history of attention deficit hyperactivity disorder, predominantly inattentive type
- Family history of autism
- Family history of autism in sibling
- Family history of bulimia nervosa
- Family history of dementia
- Family history of development disorder
- Family history of disorder due to sex chromosome abnormality
- Family history of eating disorder
- Family history of Gilles de la Tourette syndrome
- Family history of harmful pattern of substance use
- Family history of intellectual disability
- Family history of learning disability
- Family history of mental disorder
- Family history of movement disorder
- Family history of neurological developmental delay
- Family history of obsessive-compulsive disorder
- Family history of paranoid disorder
- Family history of physical aggression
- Family history of presenile dementia
- Family history of problem behavior
- Family history of psychotic illness
- Family history of Rett syndrome
- Family history of self abuse
- Family history of speech and language disorder
- Family history of tic
- FH: Alzheimer's disease
- FH: Anxiety state
- FH: Depression
- FH: Manic-depressive state
- FH: Puerperal depression
- FH: Schizophrenia
- FH: Senile dementia
- FH: Suicide
- H/O - maternal psychiatric problem
- History of schizophrenia in child of subject
- Maternal substance abuse
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to Z81.8: its own notes plus those printed at block Z77-Z99 and Chapter 21. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
Code Also
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
Notes
General instructions on how these codes are used.
- Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
- (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
- (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name Z81.8, its category, or a range that includes it.
Use Additional Code 1
These codes say to use an additional code from the note, and Z81.8 is one of the codes named.
- Z15 Genetic susceptibility to disease
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
family (of) See Also: History, personal (of);
behavioral NEC Z81.8
mental NEC Z81.8
psychiatric NEC Z81.8
disorder NEC Z81.8
psychiatric disorder Z81.8
self-harmful behavior Z81.8
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 Z81.8 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Z81.8Overview
What is the ICD-10 code for family history of other mental and behavioral disorders?
The ICD-10-CM code for family history of other mental and behavioral disorders is Z81.8 (sometimes written as Z818). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is Z81.8 (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 other mental and behavioral disorders on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does Z81.8 group to?
On inpatient claims, family history of other mental and behavioral disorders maps to MS-DRG 951, 795, with relative weights from 0.2022 to 0.5574 depending on complications. Higher weights mean higher Medicare reimbursement.
Can Z81.8 be a principal diagnosis?
No. The Medicare Code Editor rejects this code as a principal diagnosis because family history of other mental and behavioral disorders describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.
Is Z81.8 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 other mental and behavioral disorders on inpatient claims. The code appears in the Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99) range of the CMS exempt list.
