Z13.0 Encounter for screening for diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applies from Z13 Encounter for screening for other diseases and disorders

Applicable to

• Screening is the testing for disease or disease precursors in asymptomatic individuals so that early detection and treatment can be provided for those who test positive for the disease.

Excludes1 (never code together)

• encounter for diagnostic examination-code to sign or symptom

MS-DRG index

Defines the logic of DRG(s) 951 in MDC 23.

Approximate ICD-9-CM (GEMs)

• V78.2 Screening for sickle-cell disease or trait (approximate)
• V78.3 Screening for other hemoglobinopathies (approximate)
• V78.9 Screening for unspecified disorder of blood and blood-forming organs (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.

Code annotations containing back-references to Z13.0

Back-references to Z13

• Type 2 Excludes: Z00 Encounter for general examination without complaint, suspected or reported diagnosis ("special screening examinations (Z11-Z13)")
• Type 2 Excludes: Z01 Encounter for other special examination without complaint, suspected or reported diagnosis ("screening examinations (Z11-Z13)")

Diagnosis Index entries for Z13.0

• Screening (for) › anemia
• Screening (for) › disease or disorder › blood or blood-forming organ
• Screening (for) › disease or disorder › immunity
• Screening (for) › disease or disorder › sickle-cell (trait)
• Screening (for) › hemoglobinopathies NEC
• Screening (for) › immunity disorders
• Screening (for) › sickle-cell disease or trait

Nearby codes

• Z13 Encounter for screening for other diseases and disorders
• Z13.0 Encounter for screening for diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (this code)
• Z13.1 Encounter for screening for diabetes mellitus
• Z13.2 Encounter for screening for nutritional, metabolic and other endocrine disorders
• Z13.21 Encounter for screening for nutritional disorder
• Z13.22 Encounter for screening for metabolic disorder
• Z13.220 Encounter for screening for lipoid disorders