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Z Codes That May Only be Principal/First-Listed Diagnosis

By:  Chris Woolstenhulme, QCC, CMCS, CPC, CMRS
Published:  March 2nd, 2017

The following Z codes/categories may only be reported as the principal/first-listed diagnosis, except when there are multiple encounters on the same day and the medical records for the encounters are combined:

Z00 Encounter for general examination without complaint, suspected or reported diagnosis
      Except: Z00.6 Z01 Encounter for other special examination without complaint, suspected or reported diagnosis
Z02 Encounter for administrative examination
Z03 Encounter for medical observation for suspected diseases and conditions ruled out
Z04 Encounter for examination and observation for other reasons
Z33.2   Encounter for elective termination of pregnancy
Z31.81  Encounter for male factor infertility in female patient 
Z31.83  Encounter for assisted reproductive fertility procedure cycle 
Z31.84  Encounter for fertility preservation procedure
Z34 Encounter for supervision of normal pregnancy
Z39 Encounter for maternal postpartum care and examination 
Z38 Liveborn infants according to place of birth and type of delivery
Z42 Encounter for plastic and reconstructive surgery following medical procedure or healed injury
Z51.0   Encounter for antineoplastic radiation therapy
Z51.1   Encounter for antineoplastic chemotherapy and immunotherapy
Z52    Donors of organs and tissues
         Except: Z52.9, Donor of unspecified organ or tissue
Z76.1  Encounter for health supervision and care of foundling
Z76.2  Encounter for health supervision and care of other healthy infant and child 
Z99.12 Encounter for respirator [ventilator] dependence during power failure

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