All ICD10 Codes
Chapter 21

Z00–Z99: Factors Influencing Health Status and Contact with Health Services

Factors Influencing Health Status and Contact with Health Services diagnostic classification updated for 2026.

All CodesBillable Only
Internal Codes
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  • Z3A.25—

    25 weeks gestation of pregnancy

  • Z3A.26—

    26 weeks gestation of pregnancy

  • Z3A.27—

    27 weeks gestation of pregnancy

  • Z3A.28—

    28 weeks gestation of pregnancy

  • Z3A.29—

    29 weeks gestation of pregnancy

  • Z3A.3—

    Weeks of gestation of pregnancy, weeks 30-39

  • Z3A.30—

    30 weeks gestation of pregnancy

  • Z3A.31—

    31 weeks gestation of pregnancy

  • Z3A.32—

    32 weeks gestation of pregnancy

  • Z3A.33—

    33 weeks gestation of pregnancy

  • Z3A.34—

    34 weeks gestation of pregnancy

  • Z3A.35—

    35 weeks gestation of pregnancy

  • Z3A.36—

    36 weeks gestation of pregnancy

  • Z3A.37—

    37 weeks gestation of pregnancy

  • Z3A.38—

    38 weeks gestation of pregnancy

  • Z3A.39—

    39 weeks gestation of pregnancy

  • Z3A.4—

    Weeks of gestation of pregnancy, weeks 40 or greater

  • Z3A.40—

    40 weeks gestation of pregnancy

  • Z3A.41—

    41 weeks gestation of pregnancy

  • Z3A.42—

    42 weeks gestation of pregnancy

  • Z3A.49—

    Greater than 42 weeks gestation of pregnancy

  • Z40—

    Encounter for prophylactic surgery

  • Z40.0—

    Encounter for prophylactic surgery for risk factors related to malignant neoplasms

  • Z40.00—

    Encounter for prophylactic removal of unspecified organ

  • Z40.01—

    Encounter for prophylactic removal of breast

  • Z40.02—

    Encounter for prophylactic removal of ovary(s)

  • Z40.03—

    Encounter for prophylactic removal of fallopian tube(s)

  • Z40.09—

    Encounter for prophylactic removal of other organ

  • Z40.8—

    Encounter for other prophylactic surgery

  • Z40.81—

    Encounter for prophylactic surgery for removal of ovary(s) for persons without known genetic/familial risk factors

  • Z40.82—

    Encounter for prophylactic surgery for removal of fallopian tube(s) for persons without known genetic/familial risk factors

  • Z40.89—

    Encounter for other prophylactic surgery

  • Z40.9—

    Encounter for prophylactic surgery, unspecified

  • Z41—

    Encounter for procedures for purposes other than remedying health state

  • Z41.1—

    Encounter for cosmetic surgery

  • Z41.2—

    Encounter for routine and ritual male circumcision

  • Z41.3—

    Encounter for ear piercing

  • Z41.8—

    Encounter for other procedures for purposes other than remedying health state

  • Z41.9—

    Encounter for procedure for purposes other than remedying health state, unspecified

  • Z42—

    Encounter for plastic and reconstructive surgery following medical procedure or healed injury

  • Z42.1—

    Encounter for breast reconstruction following mastectomy

  • Z42.8—

    Encounter for other plastic and reconstructive surgery following medical procedure or healed injury

  • Z43—

    Encounter for attention to artificial openings

  • Z43.0—

    Encounter for attention to tracheostomy

  • Z43.1—

    Encounter for attention to gastrostomy

  • Z43.2—

    Encounter for attention to ileostomy

  • Z43.3—

    Encounter for attention to colostomy

  • Z43.4—

    Encounter for attention to other artificial openings of digestive tract

  • Z43.5—

    Encounter for attention to cystostomy

  • Z43.6—

    Encounter for attention to other artificial openings of urinary tract

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