O09.00 ICD-10-CM Code: Supervision of pregnancy with history of infertility, unspecified trimester
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Inpatient Payment Groups (MS-DRG)
MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.
- MS-DRG 998 — PRINCIPAL DIAGNOSIS INVALID AS DISCHARGE DIAGNOSIS (MDC 14)
A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.
Official Registry Overview & Definition
Change history
No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.
Verify Before Coding
- Principal-diagnosis restriction. The Medicare Code Editor lists this code as unacceptable as a principal diagnosis: it describes a circumstance influencing health status rather than a current illness or injury being treated. It is valid as a secondary diagnosis.
- Age-restricted: the Medicare Code Editor lists this as a maternity (age 9-64) diagnosis; other ages are presumed incorrect.
From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.
Contextual Map
Every relationship of O09.00 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.
Hierarchy
- O00-O9A — Chapter 15: Pregnancy, Childbirth and the Puerperium (O00-O9A) (O00-O9A) [Hierarchy]
- O09-O09 — Supervision of high risk pregnancy [Hierarchy]
Referenced by Excludes1 notes
- Z34 — Encounter for supervision of normal pregnancy [Excludes1](via O09.-): “encounter for supervision of high risk pregnancy (O09.-)” · check together
Referenced by Code First instructions
- Z3A — Weeks of gestation [Code First](via O09.-): “obstetric condition or encounter for delivery (O09-O60, O80-O82, O94-O9A)” · check together
Clinical classification (CCSR)
- PRG008 — Supervision of high-risk pregnancy [CCSR]
Potential MS-DRG
- DRG 998 — PRINCIPAL DIAGNOSIS INVALID AS DISCHARGE DIAGNOSIS [MS-DRG]: “PRINCIPAL DIAGNOSIS INVALID AS DISCHARGE DIAGNOSIS (MDC 14)”
Nearest codes (40)
- O09 — Supervision of high risk pregnancy [Sibling]
- O09.0 — Supervision of pregnancy with history of infertility [Sibling]
- O09.01 — Supervision of pregnancy with history of infertility, first trimester [Sibling]
- O09.02 — Supervision of pregnancy with history of infertility, second trimester [Sibling]
- O09.03 — Supervision of pregnancy with history of infertility, third trimester [Sibling]
- O09.1 — Supervision of pregnancy with history of ectopic pregnancy [Sibling]
- O09.10 — Supervision of pregnancy with history of ectopic pregnancy, unspecified trimester [Sibling]
- O09.11 — Supervision of pregnancy with history of ectopic pregnancy, first trimester [Sibling]
- and 32 more
Referenced by Other Codes
Clinical classification (AHRQ CCSR):PRG008 — Supervision of high-risk pregnancy (default).
Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.
Potential MS-DRG Relationships (FY2026)
Not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity.
Named in the grouper logic of 1 MS-DRG: DRG 998 (MDC 14).
From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.
Official ICD-10-CM tabular notes on other codes that name O09.00 or its code family.
1 Excludes1 notes: Z34 (via O09.-).
1 Code First instructions: Z3A (via O09.-).
Nearest Codes in This Family
Official ICD-10-CM classifications closest to O09.00 in its code family, with their registry titles.
- O09 — Supervision of high risk pregnancy
- O09.0 — Supervision of pregnancy with history of infertility
- O09.01 — Supervision of pregnancy with history of infertility, first trimester
- O09.02 — Supervision of pregnancy with history of infertility, second trimester
- O09.03 — Supervision of pregnancy with history of infertility, third trimester
- O09.1 — Supervision of pregnancy with history of ectopic pregnancy
- O09.10 — Supervision of pregnancy with history of ectopic pregnancy, unspecified trimester
- O09.11 — Supervision of pregnancy with history of ectopic pregnancy, first trimester
- O09.12 — Supervision of pregnancy with history of ectopic pregnancy, second trimester
- O09.13 — Supervision of pregnancy with history of ectopic pregnancy, third trimester