O36.91 is the authoritative medical code for Maternal care for fetal problem, unspecified, first trimester. This classification is used in medical billing and clinical recording to specify the clinical criteria for maternal care for fetal problem, unspecified, first trimester (ICD-10-CM O36.91), 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
Maternal care for fetal problem, unspecified, first trimester is a non-billable ICD-10-CM category code O36.91. A more specific billable subcode must be selected for claims submission. Includes: the listed conditions in the fetus as a reason for hospitalization or other obstetric care of the mother, or for termination of pregnancy. Excludes1 (not coded here): encounter for suspected maternal and fetal conditions ruled out Z03.7-; placental transfusion syndromes O43.0-. Excludes2 (not included here): labor and delivery complicated by fetal stress O77.-. 7th character: One of the following 7th characters is to be assigned to each code under category O36. 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 O36 that has a 7th character of 1 through 9..
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for O36.91 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- the listed conditions in the fetus as a reason for hospitalization or other obstetric care of the mother, or for termination of pregnancy
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- encounter for suspected maternal and fetal conditions ruled out Z03.7-
- placental transfusion syndromes O43.0-
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- labor and delivery complicated by fetal stress O77.-
Frequently Asked Questions (FAQ) & Clinical Guidance
Can O36.91 be billed directly?
No. O36.91 (Maternal care for fetal problem, unspecified, first trimester) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does O36.91 require a 7th character?
Yes. One of the following 7th characters is to be assigned to each code under category O36. 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 O36 that has a 7th character of 1 through 9..
What can't be coded together with O36.91?
Per Excludes1 instructions, O36.91 must not be reported with: encounter for suspected maternal and fetal conditions ruled out (Z03.7-); placental transfusion syndromes (O43.0-).
Can O36.91 be reported alongside related conditions?
Per Excludes2 instructions, O36.91 and the following may both be reported when both are present: labor and delivery complicated by fetal stress (O77.-).
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as O36.91, with their registry titles.
- O36 — Maternal care for other fetal problems
- O36.0 — Maternal care for rhesus isoimmunization
- O36.01 — Maternal care for anti-D [Rh] antibodies
- O36.011 — Maternal care for anti-D [Rh] antibodies, first trimester
- O36.0110 — Maternal care for anti-D [Rh] antibodies, first trimester, not applicable or unspecified
- O36.0111 — Maternal care for anti-D [Rh] antibodies, first trimester, fetus 1
- O36.0112 — Maternal care for anti-D [Rh] antibodies, first trimester, fetus 2
- O36.0113 — Maternal care for anti-D [Rh] antibodies, first trimester, fetus 3
- O36.0114 — Maternal care for anti-D [Rh] antibodies, first trimester, fetus 4
- O36.0115 — Maternal care for anti-D [Rh] antibodies, first trimester, fetus 5
- O36.0119 — Maternal care for anti-D [Rh] antibodies, first trimester, other fetus
- O36.012 — Maternal care for anti-D [Rh] antibodies, second trimester
- O36.0120 — Maternal care for anti-D [Rh] antibodies, second trimester, not applicable or unspecified
- O36.0121 — Maternal care for anti-D [Rh] antibodies, second trimester, fetus 1
- O36.0122 — Maternal care for anti-D [Rh] antibodies, second trimester, fetus 2
- O36.0123 — Maternal care for anti-D [Rh] antibodies, second trimester, fetus 3
- O36.0124 — Maternal care for anti-D [Rh] antibodies, second trimester, fetus 4
- O36.0125 — Maternal care for anti-D [Rh] antibodies, second trimester, fetus 5
- O36.0129 — Maternal care for anti-D [Rh] antibodies, second trimester, other fetus
- O36.013 — Maternal care for anti-D [Rh] antibodies, third trimester
- O36.0130 — Maternal care for anti-D [Rh] antibodies, third trimester, not applicable or unspecified
- O36.0131 — Maternal care for anti-D [Rh] antibodies, third trimester, fetus 1
- O36.0132 — Maternal care for anti-D [Rh] antibodies, third trimester, fetus 2
- O36.0133 — Maternal care for anti-D [Rh] antibodies, third trimester, fetus 3
- O36.0134 — Maternal care for anti-D [Rh] antibodies, third trimester, fetus 4
- O36.0135 — Maternal care for anti-D [Rh] antibodies, third trimester, fetus 5
- O36.0139 — Maternal care for anti-D [Rh] antibodies, third trimester, other fetus
- O36.019 — Maternal care for anti-D [Rh] antibodies, unspecified trimester
- O36.0190 — Maternal care for anti-D [Rh] antibodies, unspecified trimester, not applicable or unspecified
- O36.0191 — Maternal care for anti-D [Rh] antibodies, unspecified trimester, fetus 1
- O36.0192 — Maternal care for anti-D [Rh] antibodies, unspecified trimester, fetus 2
- O36.0193 — Maternal care for anti-D [Rh] antibodies, unspecified trimester, fetus 3
- O36.0194 — Maternal care for anti-D [Rh] antibodies, unspecified trimester, fetus 4
- O36.0195 — Maternal care for anti-D [Rh] antibodies, unspecified trimester, fetus 5
- O36.0199 — Maternal care for anti-D [Rh] antibodies, unspecified trimester, other fetus
- O36.09 — Maternal care for other rhesus isoimmunization
- O36.091 — Maternal care for other rhesus isoimmunization, first trimester
- O36.0910 — Maternal care for other rhesus isoimmunization, first trimester, not applicable or unspecified
- O36.0911 — Maternal care for other rhesus isoimmunization, first trimester, fetus 1
- O36.0912 — Maternal care for other rhesus isoimmunization, first trimester, fetus 2
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 O34.91
Maternal care for abnormality of pelvic organ, unspecified, first trimester
ICD Code O41.91
Disorder of amniotic fluid and membranes, unspecified, first trimester