O31.10 is the authoritative medical code for Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester. This classification is used in medical billing and clinical recording to specify the clinical criteria for continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester (ICD-10-CM O31.10), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester is a non-billable ICD-10-CM category code O31.10. A more specific billable subcode must be selected for claims submission. Excludes2 (not included here): delayed delivery of second twin, triplet, etc. O63.2; malpresentation of one fetus or more O32.9; placental transfusion syndromes O43.0-. 7th character: One of the following 7th characters is to be assigned to each code under category O31. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O31 that has a 7th character of 1 through 9..
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for O31.10 in the official ICD-10-CM tabular list.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- delayed delivery of second twin, triplet, etc. O63.2
- malpresentation of one fetus or more O32.9
- placental transfusion syndromes O43.0-
Frequently Asked Questions (FAQ) & Clinical Guidance
Can O31.10 be billed directly?
No. O31.10 (Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does O31.10 require a 7th character?
Yes. One of the following 7th characters is to be assigned to each code under category O31. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O31 that has a 7th character of 1 through 9..
Can O31.10 be reported alongside related conditions?
Per Excludes2 instructions, O31.10 and the following may both be reported when both are present: delayed delivery of second twin, triplet, etc. (O63.2); malpresentation of one fetus or more (O32.9); placental transfusion syndromes (O43.0-).
Codes in This Family (7)
Official ICD-10-CM classifications in the same code family as O31.10, with their registry titles.
- O31.100 — Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, not applicable or unspecified
- O31.101 — Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 1
- O31.102 — Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 2
- O31.103 — Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 3
- O31.104 — Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 4
- O31.105 — Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, fetus 5
- O31.109 — Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester, other fetus
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code O30.10
Triplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs
ICD Code O32.10
Maternal care for breech presentation, not applicable or unspecified
ICD Code O34.10
Maternal care for benign tumor of corpus uteri, unspecified trimester
ICD Code O35.10
Maternal care for (suspected) chromosomal abnormality in fetus, unspecified