2026 ICD-10-CM Diagnosis Code Z83.2Family history of diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
Z83.2 is a billable ICD-10-CM diagnosis code for family history of diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism. 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. 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 Z83.2.
Present on Admission (POA)Billing
Z83.2 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.
- Family history of alpha thalassemia
- Family history of antiphospholipid syndrome
- Family history of antithrombin III deficiency
- Family history of asplenia
- Family history of beta thalassemia
- Family history of blood coagulation disorder
- Family history of congenital immunodeficiency disease
- Family history of disorder due to sex chromosome abnormality
- Family history of disorder of immune function
- Family history of factor V deficiency
- Family history of Factor V Leiden mutation
- Family history of hemoglobinopathy
- Family history of hemoglobinopathy C
- Family history of hemoglobinopathy E
- Family history of hemophilia A
- Family history of hypercoagulable state
- Family history of immunodeficiency disorder
- Family history of pernicious anemia
- Family history of polycythemia
- Family history of protein C deficiency
- Family history of protein C resistance
- Family history of protein S deficiency
- Family history of rheumatic fever
- Family history of sarcoidosis
- Family history of sickle cell anemia
- Family history of Von Willebrand disease
- FH: Anemia
- FH: Autoimmune disease
- FH: Blood disorder
- FH: Hemophilia
- FH: Hereditary spherocytosis
- FH: Sickle cell trait
- FH: Spherocytosis
- FH: Thalassemia
- Partner has hemophilia
- Spouse hemophiliac
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
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);
- anemia - Z83.2
- blood and blood-forming organs - Z83.2
- hematological - Z83.2
- immune mechanism - Z83.2
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- History
- family (of)
- anemia
- History
- family (of)
- disease or disorder (of)
- blood and blood-forming organs
- History
- family (of)
- disease or disorder (of)
- hematological
- History
- family (of)
- disease or disorder (of)
- immune mechanism
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Blood Disorders
Your blood is living tissue made up of liquid and solids. The liquid part, called plasma, is made of water, salts and protein. Over half of your blood is plasma. The solid part of your blood contains red blood cells, white blood cells and platelets.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert Z83.2 to ICD-9-CMHistory
Code HistoryHistory
Questions About Z83.2Overview
Is Z83.2 (Family history of other specific disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report family history of diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Can Z83.2 be a principal diagnosis?
No. The Medicare Code Editor rejects this code as a principal diagnosis because family history of diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.
Is Z83.2 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 diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism on inpatient claims.
What is the ICD-9 equivalent of Z83.2?
Under the General Equivalence Mappings, family history of diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism converts to ICD-9-CM V18.2 (family hx-anemia) and V18.3 (fam hx-blood disord NEC). The mapping is approximate, so confirm the match fits the documentation.
