Z02.81 ICD-10-CM Code: Encounter for paternity testing

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for Z02.81 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on Z02.81 itself; “inherited from” names the category or block whose note applies here.

Coder workflow for Z02.81

MedCoder structured workflow — derived from this code’s own official record

Before you code Z02.81

1. Confirm the reason for the encounter this Z code records: an examination or encounter with no complaint or diagnosis. Check whether the code may be reported as first-listed or principal — some Z codes are limited to one position — and do not report a history or status code for a condition documented as current. Z code categories and their reporting positions (Guidelines I.C.21.c, I.C.21.c.15).

   Guide: Z codes as principal or first-listed diagnosis →

Documentation check

The provider’s diagnostic statement

Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).

The reason for the encounter

Whether the code records the encounter’s purpose, a status, or a history — and whether it may be first-listed (Guidelines I.C.21.c).

Official instructions as workflow

• Excludes2 — not part of Z02.81(1 note)

  Coding workflow: The conditions named in this note are not included in Z02.81. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

  CompareZ39

  See the official tabular notes · Guidelines I.A.12.b

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Indexed Clinical Terms (2)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

• Encounter (with health service) (for), administrative purpose only, examination for, paternity testing
• Examination (for) (following) (general) (of) (routine), medical (adult) (for) (of), paternity testing

Official Coding Guidelines

Official source data — quoted verbatim from the CMS/NCHS Official Guidelines

Official source data — quoted verbatim from the CMS/NCHS Official Guidelines

Verbatim excerpts from the ICD-10-CM Official Guidelines for Coding and Reporting (CMS/NCHS) that govern this code.

Don’t confuse Z02.81 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of Z02.81 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

• Z30— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of examinations related to pregnancy and reproduction adds Z30; it is not part of this code and both may be reported when both are documented.

  Full comparison: Z02.81 vs Z30 →

• Z36— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of examinations related to pregnancy and reproduction adds Z36; it is not part of this code and both may be reported when both are documented.

  Full comparison: Z02.81 vs Z36 →

• Z39— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of examinations related to pregnancy and reproduction adds Z39; it is not part of this code and both may be reported when both are documented.

  Full comparison: Z02.81 vs Z39 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Verify Before Coding

• No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name Z02.81 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 3 Excludes1 notes: Z00 — Encounter for general examination without complaint, suspected or reported diagnosis (via Z02.-), Z01 — Encounter for other special examination without complaint, suspected or reported diagnosis (via Z02.-), Z02.7 — Encounter for issue of medical certificate.

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 1 Excludes2 note: Z71.84 — Encounter for health counseling related to travel (via Z02.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 1 MS-DRG: DRG 951 (MDC 23).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):FAC001 — Encounter for administrative purposes (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Encounter for administrative purposes).

Z02.0 — Encounter for examination for admission to educational institution, Z02.1 — Encounter for pre-employment examination, Z02.2 — Encounter for examination for admission to residential institution, Z02.3 — Encounter for examination for recruitment to armed forces, Z02.4 — Encounter for examination for driving license, Z02.5 — Encounter for examination for participation in sport, Z02.6 — Encounter for examination for insurance purposes, Z02.71 — Encounter for disability determination, Z02.79 — Encounter for issue of other medical certificate, Z02.82 — Encounter for adoption services, Z02.83 — Encounter for blood-alcohol and blood-drug test, Z02.84 — Encounter for child welfare exam, Z02.89 — Encounter for other administrative examinations, Z02.9 — Encounter for administrative examinations, unspecified

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main terms “Encounter”, “Examination”; these codes share that main term but sit in a different category of the Tabular List.

Z01.419 — Encounter for gynecological examination (general) (routine) without abnormal findings (pelvic), Z01.42 — Encounter for cervical smear to confirm findings of recent normal smear following initial abnormal smear (repeat cervical smear to confirm findings of recent normal smear following initial abnormal smear), Z01.810 — Encounter for preprocedural cardiovascular examination (pre-procedural, cardiovascular), Z01.811 — Encounter for preprocedural respiratory examination (pre-procedural, respiratory), Z01.812 — Encounter for preprocedural laboratory examination (laboratory, preprocedural), Z01.818 — Encounter for other preprocedural examination (pre-chemotherapy), Z01.82 — Encounter for allergy testing (skin), Z01.83 — Encounter for blood typing (Rh typing), Z01.84 — Encounter for antibody response examination (antibody response), Z01.89 — Encounter for other specified special examinations (special), Z03.71 — Encounter for suspected problem with amniotic cavity and membrane ruled out (suspected condition, ruled out, polyhydramnios), Z03.72 — Encounter for suspected placental problem ruled out (suspected condition, ruled out, placental problem), Z03.73 — Encounter for suspected fetal anomaly ruled out (suspected condition, ruled out, fetal anomaly), Z03.74 — Encounter for suspected problem with fetal growth ruled out (suspected condition, ruled out, fetal growth), Z03.75 — Encounter for suspected cervical shortening ruled out (suspected condition, ruled out, cervical shortening), Z03.79 — Encounter for other suspected maternal and fetal conditions ruled out (suspected condition, ruled out, maternal and fetal conditions NEC), Z03.810 — Encounter for observation for suspected exposure to anthrax ruled out (observation, exposure to, anthrax), Z03.818 — Encounter for observation for suspected exposure to other biological agents ruled out (observation, exposure to, biological agent NEC), Z03.83 — Encounter for observation for suspected conditions related to home physiologic monitoring device ruled out (observation, alarm, without findings, apnea), Z04.1 — Encounter for examination and observation following transport accident (following, motor vehicle accident), +132 more

Contextual Map

Every relationship of Z02.81 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run Z02.81 with these 4 related codes in Claim Check

Hierarchy

• Z00-Z99 — Chapter 21: Factors Influencing Health Status and Contact with Health Services (Z00-Z99) (Z00-Z99)[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• Z00-Z13 — Persons encountering health services for examinations[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Referenced by Excludes1 notes

• Z00 — Encounter for general examination without complaint, suspected or reported diagnosis[Excludes1](via Z02.-): “encounter for examination for administrative purposes (Z02.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• Z01 — Encounter for other special examination without complaint, suspected or reported diagnosis[Excludes1](via Z02.-): “encounter for examination for administrative purposes (Z02.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• Z02.7 — Encounter for issue of medical certificate[Excludes1]: “encounter for general medical examination (Z00-Z01, Z02.0-Z02.6, Z02.8-Z02.9)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Excludes2 notes

• Z71.84 — Encounter for health counseling related to travel[Excludes2](via Z02.-): “encounter for administrative examination (Z02.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Clinical classification (CCSR)

• FAC001 — Encounter for administrative purposes[CCSR]— AHRQ CCSR for ICD-10-CM Diagnoses (HCUP)

MS-DRG Grouper

• DRG 951 — OTHER FACTORS INFLUENCING HEALTH STATUS[MS-DRG]: “OTHER FACTORS INFLUENCING HEALTH STATUS (MDC 23)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026

MDC crossing

• MDC 23 — Factors Influencing Health Status and Other Contacts with Health Services[MDC crossing]: “Factors Influencing Health Status and Other Contacts with Health Services — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 1,235 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries

• Encounter (with health service) (for), administrative purpose only, examination for, paternity testing[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Examination (for) (following) (general) (of) (routine), medical (adult) (for) (of), paternity testing[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Nearest codes (17)

• Z02 — Encounter for administrative examination[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• Z02.0 — Encounter for examination for admission to educational institution[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• Z02.1 — Encounter for pre-employment examination[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• Z02.2 — Encounter for examination for admission to residential institution[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• Z02.3 — Encounter for examination for recruitment to armed forces[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• Z02.4 — Encounter for examination for driving license[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• Z02.5 — Encounter for examination for participation in sport[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• Z02.6 — Encounter for examination for insurance purposes[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• and 9 more

Change history

• FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data

CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page

Coding guidelines Official source data

ICD-10-CM Official Guidelines for Coding and Reporting (FY2026), quoted by section Release, file and checksum · Publisher’s page

Claim edits Official source data

CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page

Inpatient payment groups Official source data

CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page

Change history and date-of-service validity Official source data

CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page

Comparisons, relationships and the contextual map MedCoder structured relationship

Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears

Summary and FAQ answers MedCoder explanation

Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Nearest Codes in This Family

Official ICD-10-CM classifications closest to Z02.81 in its code family, with their registry titles.

• Z02.6 — Encounter for examination for insurance purposes
• Z02.7 — Encounter for issue of medical certificate
• Z02.71 — Encounter for disability determination
• Z02.79 — Encounter for issue of other medical certificate
• Z02.8 — Encounter for other administrative examinations
• Z02.82 — Encounter for adoption services
• Z02.83 — Encounter for blood-alcohol and blood-drug test
• Z02.84 — Encounter for child welfare exam
• Z02.89 — Encounter for other administrative examinations
• Z02.9 — Encounter for administrative examinations, unspecified

View all codes in the Z02 family