Z23ICD-10-CM DiagnosisEncounter for immunizationFactors influencing health status (Z00-Z99)

Z23 - Immunization

Diagnostic indication for Immunization

ICD-10-CM Code
Z23
Diagnostic Category
Encounter for immunizationFactors influencing health status (Z00-Z99)
Primary CDT Treatment
D1701 (D1701)
Indicated Claim Types
BOTH (14 mapped procedures)

Indicated ADA CDT Dental Procedures for Z23 (14)

Dental and oral surgery procedures clinically justified by ICD-10-CM Z23 (Immunization).

CDT CodeProcedure NameCategoryJustification RoleClaim TypeClinical ScenarioReference Fee
D1701D1701Dental Procedure★ Primary JustificationBOTHPfizer-BioNTech Covid-19 vaccine administration – first dose indicated for ImmunizationN/A
D1702D1702Dental Procedure★ Primary JustificationBOTHPfizer-BioNTech Covid-19 vaccine administration – second dose indicated for ImmunizationN/A
D1703D1703Dental Procedure★ Primary JustificationBOTHModerna Covid-19 vaccine administration – first dose indicated for ImmunizationN/A
D1704D1704Dental Procedure★ Primary JustificationBOTHModerna Covid-19 vaccine administration – second dose indicated for ImmunizationN/A
D1708COVID Vaccine (3rd)Preventive★ Primary JustificationBOTHPfizer-BioNTech Covid-19 vaccine administration – third dose indicated for ImmunizationN/A
D1709COVID BoosterPreventive★ Primary JustificationBOTHPfizer-BioNTech Covid-19 vaccine administration – booster dose indicated for ImmunizationN/A
D1710COVID Vaccine (3rd)Preventive★ Primary JustificationBOTHModerna Covid-19 vaccine administration – third dose indicated for ImmunizationN/A
D1711COVID BoosterPreventive★ Primary JustificationBOTHModerna Covid-19 vaccine administration – booster dose indicated for ImmunizationN/A
D1713COVID Pediatric (1st)Preventive★ Primary JustificationBOTHPfizer-BioNTech Covid-19 vaccine administration tris-sucrose pediatric – first dose indicated for ImmunizationN/A
D1714COVID Pediatric (2nd)Preventive★ Primary JustificationBOTHPfizer-BioNTech Covid-19 vaccine administration tris-sucrose pediatric – second dose indicated for ImmunizationN/A
D1720Influenza VaccinePreventive★ Primary JustificationBOTHinfluenza vaccine administration indicated for ImmunizationN/A
D1781HPV Vaccine (1st)Preventive★ Primary JustificationBOTHvaccine administration – human papillomavirus – Dose 1 indicated for ImmunizationN/A
D1782HPV Vaccine (2nd)Preventive★ Primary JustificationBOTHvaccine administration – human papillomavirus – Dose 2 indicated for ImmunizationN/A
D1783HPV Vaccine (3rd)Preventive★ Primary JustificationBOTHvaccine administration – human papillomavirus – Dose 3 indicated for ImmunizationN/A

Clinical Billing Context & Linked Procedure Policy Rules for Z23

Pre-submission attachment requirements, payer frequency limitations, and clinical justification criteria when billing treatments under Z23 (Immunization).

Consolidated Claim Attachment Checklist for Z23 Treatments

Include these clinical attachments when submitting ADA or CMS-1500 claims with diagnosis pointer Z23:

  • Diagnostic pre-operative radiograph showing affected tooth/area
  • Pre-operative treatment narrative and clinical rationale
D1701: D1701BOTH

Clinical Scenario: Pfizer-BioNTech Covid-19 vaccine administration – first dose indicated for Immunization

Dental ProcedureFull D1701 policy guide →
D1702: D1702BOTH

Clinical Scenario: Pfizer-BioNTech Covid-19 vaccine administration – second dose indicated for Immunization

Dental ProcedureFull D1702 policy guide →
D1703: D1703BOTH

Clinical Scenario: Moderna Covid-19 vaccine administration – first dose indicated for Immunization

Dental ProcedureFull D1703 policy guide →
D1704: D1704BOTH

Clinical Scenario: Moderna Covid-19 vaccine administration – second dose indicated for Immunization

Dental ProcedureFull D1704 policy guide →
D1708: COVID Vaccine (3rd)BOTH

Clinical Scenario: Pfizer-BioNTech Covid-19 vaccine administration – third dose indicated for Immunization

Frequency Rule: 1 per arch per lifetime except under unusual circumstances (lifetime)

Required Attachments:
  • Diagnostic pre-operative radiograph showing affected tooth/area
  • Pre-operative treatment narrative and clinical rationale
Allowable Billing Criteria:
  • Indicated for premature loss of primary teeth to preserve space for eruption of succedaneous permanent teeth.
PreventiveFull D1708 policy guide →
D1709: COVID BoosterBOTH

Clinical Scenario: Pfizer-BioNTech Covid-19 vaccine administration – booster dose indicated for Immunization

Frequency Rule: 1 per arch per lifetime except under unusual circumstances (lifetime)

Required Attachments:
  • Diagnostic pre-operative radiograph showing affected tooth/area
  • Pre-operative treatment narrative and clinical rationale
Allowable Billing Criteria:
  • Indicated for premature loss of primary teeth to preserve space for eruption of succedaneous permanent teeth.
PreventiveFull D1709 policy guide →
D1710: COVID Vaccine (3rd)BOTH

Clinical Scenario: Moderna Covid-19 vaccine administration – third dose indicated for Immunization

Frequency Rule: 1 per arch per lifetime except under unusual circumstances (lifetime)

Required Attachments:
  • Diagnostic pre-operative radiograph showing affected tooth/area
  • Pre-operative treatment narrative and clinical rationale
Allowable Billing Criteria:
  • Indicated for premature loss of primary teeth to preserve space for eruption of succedaneous permanent teeth.
PreventiveFull D1710 policy guide →
D1711: COVID BoosterBOTH

Clinical Scenario: Moderna Covid-19 vaccine administration – booster dose indicated for Immunization

Frequency Rule: 1 per arch per lifetime except under unusual circumstances (lifetime)

Required Attachments:
  • Diagnostic pre-operative radiograph showing affected tooth/area
  • Pre-operative treatment narrative and clinical rationale
Allowable Billing Criteria:
  • Indicated for premature loss of primary teeth to preserve space for eruption of succedaneous permanent teeth.
PreventiveFull D1711 policy guide →

Related & Adjacent ICD-10 Diagnosis Codes (Differential Coding for Z23 Series)

Compare Z23 (Immunization) against adjacent Z23 / Z23 ICD-10-CM sibling codes to ensure accurate anatomical and severity specificity on claims.

View full ICD-10 directory →
Sibling ICD-10 CodeClinical Diagnosis NameCategoryDifferential Specificity vs. Z23
Z23 (Current)ImmunizationEncounter for immunizationFocal diagnosis selected — Diagnostic indication for Immunization
G47.63Sleep related bruxismSleep disordersRelated Sleep disorders diagnosis — Diagnostic indication for Sleep related bruxism.
K00.0AnodontiaDisorders of tooth development and eruptionRelated Disorders of tooth development and eruption diagnosis — Diagnostic indication for Anodontia.
K00.00AnodontiaDisorders of tooth development and eruptionRelated Disorders of tooth development and eruption diagnosis — Diagnostic indication for Anodontia.
K00.1Supernumerary teethDisorders of tooth development and eruptionRelated Disorders of tooth development and eruption diagnosis — Diagnostic indication for Supernumerary teeth.
K00.2Abnormalities of size and form of teethDisorders of tooth development and eruptionRelated Disorders of tooth development and eruption diagnosis — Diagnostic indication for Abnormalities of size and form of teeth.
K00.6Disturbances in tooth eruptionDisorders of tooth development and eruptionRelated Disorders of tooth development and eruption diagnosis — Diagnostic indication for Disturbances in tooth eruption.
K01.0Embedded teethEmbedded and impacted teethRelated Embedded and impacted teeth diagnosis — Diagnostic indication for Embedded teeth.
K01.1Impacted teethEmbedded and impacted teethRelated Embedded and impacted teeth diagnosis — Diagnostic indication for Impacted teeth.

Frequently Asked Questions — Z23 (Immunization)

Clinical coding, claim submission, and differential diagnosis guidelines for Z23.

What dental procedures (CDT codes) correspond to ICD-10 diagnosis Z23?▾

Indicated ADA CDT procedure codes for ICD-10-CM Z23 (Immunization) include: D1701 - D1701 (Primary Justification) [Pfizer-BioNTech Covid-19 vaccine administration – first dose indicated for Immunization]; D1702 - D1702 (Primary Justification) [Pfizer-BioNTech Covid-19 vaccine administration – second dose indicated for Immunization]; D1703 - D1703 (Primary Justification) [Moderna Covid-19 vaccine administration – first dose indicated for Immunization]; D1704 - D1704 (Primary Justification) [Moderna Covid-19 vaccine administration – second dose indicated for Immunization]; D1708 - COVID Vaccine (3rd) (Primary Justification) [Pfizer-BioNTech Covid-19 vaccine administration – third dose indicated for Immunization]; D1709 - COVID Booster (Primary Justification) [Pfizer-BioNTech Covid-19 vaccine administration – booster dose indicated for Immunization]; D1710 - COVID Vaccine (3rd) (Primary Justification) [Moderna Covid-19 vaccine administration – third dose indicated for Immunization]; D1711 - COVID Booster (Primary Justification) [Moderna Covid-19 vaccine administration – booster dose indicated for Immunization]; D1713 - COVID Pediatric (1st) (Primary Justification) [Pfizer-BioNTech Covid-19 vaccine administration tris-sucrose pediatric – first dose indicated for Immunization]; D1714 - COVID Pediatric (2nd) (Primary Justification) [Pfizer-BioNTech Covid-19 vaccine administration tris-sucrose pediatric – second dose indicated for Immunization]; D1720 - Influenza Vaccine (Primary Justification) [influenza vaccine administration indicated for Immunization]; D1781 - HPV Vaccine (1st) (Primary Justification) [vaccine administration – human papillomavirus – Dose 1 indicated for Immunization]; D1782 - HPV Vaccine (2nd) (Primary Justification) [vaccine administration – human papillomavirus – Dose 2 indicated for Immunization]; D1783 - HPV Vaccine (3rd) (Primary Justification) [vaccine administration – human papillomavirus – Dose 3 indicated for Immunization].

Can ICD-10 code Z23 (Immunization) be billed on both dental and medical insurance claims?▾

ICD-10-CM Z23 (Immunization) belongs to category "Encounter for immunization" (Factors influencing health status (Z00-Z99)) and supports BOTH claims. On the ADA Dental Claim Form, enter 'AB' in Box 34 and Z23 in Box 34a–34d. On the medical CMS-1500 form, report Z23 in Item 21 and link the diagnosis pointer in Item 24E.

What clinical documentation and claim attachments are required when billing procedures with Z23?▾

When submitting CDT procedures justified by Z23 (Immunization), payers commonly require: Diagnostic pre-operative radiograph showing affected tooth/area; Pre-operative treatment narrative and clinical rationale. Ensure clinical notes explicitly document findings matching "Immunization".

How does Z23 (Immunization) compare to adjacent ICD-10 diagnosis codes in differential coding?▾

Differential ICD-10-CM coding in the Z23 series requires selecting the highest clinical specificity for severity, extent, or anatomical site. Adjacent codes related to Z23 (Immunization) include: G47.63 (Sleep related bruxism); K00.0 (Anodontia); K00.00 (Anodontia); K00.1 (Supernumerary teeth); K00.2 (Abnormalities of size and form of teeth).

What insurance frequency limits and payer policy rules apply to treatments for Z23?▾

Frequency benchmarks: D1708 (COVID Vaccine (3rd)): 1 per arch per lifetime except under unusual circumstances (lifetime) | D1709 (COVID Booster): 1 per arch per lifetime except under unusual circumstances (lifetime) | D1710 (COVID Vaccine (3rd)): 1 per arch per lifetime except under unusual circumstances (lifetime) | D1711 (COVID Booster): 1 per arch per lifetime except under unusual circumstances (lifetime).