ICD-10 · PDGM grouping
Z3A Weeks of gestation
All 38 codes in the Z3A family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
38
Can lead a claim
0
Cannot lead a claim
38
What CMS assigns to Z3A
None of the 38 codes is assigned a clinical group. None of the 38 is assigned a comorbidity subgroup. None can lead a claim. CMS attaches a code-first note to all 38.
Code first
CMS grouper convention 175, on all 38 codes. Code first:
- obstetric condition or encounter for delivery (O09-O60, O80-O82, O94-O9A)
Every code in Z3A
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| Z3A.0 Weeks of gestation of pregnancy, unspecified or less than 10 weeks | ||||
| Z3A.00 | Weeks of gestation of pregnancy not specified | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.01 | Less than 8 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.08 | 8 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.09 | 9 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.1 Weeks of gestation of pregnancy, weeks 10-19 | ||||
| Z3A.10 | 10 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.11 | 11 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.12 | 12 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.13 | 13 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.14 | 14 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.15 | 15 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.16 | 16 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.17 | 17 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.18 | 18 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.19 | 19 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.2 Weeks of gestation of pregnancy, weeks 20-29 | ||||
| Z3A.20 | 20 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.21 | 21 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.22 | 22 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.23 | 23 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.24 | 24 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.25 | 25 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.26 | 26 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.27 | 27 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.28 | 28 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.29 | 29 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.3 Weeks of gestation of pregnancy, weeks 30-39 | ||||
| Z3A.30 | 30 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.31 | 31 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.32 | 32 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.33 | 33 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.34 | 34 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.35 | 35 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.36 | 36 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.37 | 37 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.38 | 38 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.39 | 39 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.4 Weeks of gestation of pregnancy, weeks 40 or greater | ||||
| Z3A.40 | 40 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.41 | 41 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.42 | 42 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z3A.49 | Greater than 42 weeks gestation of pregnancy | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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