O41.0 is the authoritative medical code for Oligohydramnios. This classification is used in medical billing and clinical recording to specify the clinical criteria for oligohydramnios (ICD-10-CM O41.0), 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
Oligohydramnios is a non-billable ICD-10-CM category code O41.0. A more specific billable subcode must be selected for claims submission. Inclusion terms: Oligohydramnios without rupture of membranes. Excludes1 (not coded here): encounter for suspected maternal and fetal conditions ruled out Z03.7-. 7th character: One of the following 7th characters is to be assigned to each code under category O41. 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 O41 that has a 7th character of 1 through 9..
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for O41.0 in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Oligohydramnios without rupture of membranes
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-
Frequently Asked Questions (FAQ) & Clinical Guidance
Can O41.0 be billed directly?
No. O41.0 (Oligohydramnios) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does O41.0 require a 7th character?
Yes. One of the following 7th characters is to be assigned to each code under category O41. 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 O41 that has a 7th character of 1 through 9..
What can't be coded together with O41.0?
Per Excludes1 instructions, O41.0 must not be reported with: encounter for suspected maternal and fetal conditions ruled out (Z03.7-).
What conditions are included under O41.0?
Oligohydramnios includes: Oligohydramnios without rupture of membranes.
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as O41.0, with their registry titles.
- O41 — Other disorders of amniotic fluid and membranes
- O41.00 — Oligohydramnios, unspecified trimester
- O41.00X0 — Oligohydramnios, unspecified trimester, not applicable or unspecified
- O41.00X1 — Oligohydramnios, unspecified trimester, fetus 1
- O41.00X2 — Oligohydramnios, unspecified trimester, fetus 2
- O41.00X3 — Oligohydramnios, unspecified trimester, fetus 3
- O41.00X4 — Oligohydramnios, unspecified trimester, fetus 4
- O41.00X5 — Oligohydramnios, unspecified trimester, fetus 5
- O41.00X9 — Oligohydramnios, unspecified trimester, other fetus
- O41.01 — Oligohydramnios, first trimester
- O41.01X0 — Oligohydramnios, first trimester, not applicable or unspecified
- O41.01X1 — Oligohydramnios, first trimester, fetus 1
- O41.01X2 — Oligohydramnios, first trimester, fetus 2
- O41.01X3 — Oligohydramnios, first trimester, fetus 3
- O41.01X4 — Oligohydramnios, first trimester, fetus 4
- O41.01X5 — Oligohydramnios, first trimester, fetus 5
- O41.01X9 — Oligohydramnios, first trimester, other fetus
- O41.02 — Oligohydramnios, second trimester
- O41.02X0 — Oligohydramnios, second trimester, not applicable or unspecified
- O41.02X1 — Oligohydramnios, second trimester, fetus 1
- O41.02X2 — Oligohydramnios, second trimester, fetus 2
- O41.02X3 — Oligohydramnios, second trimester, fetus 3
- O41.02X4 — Oligohydramnios, second trimester, fetus 4
- O41.02X5 — Oligohydramnios, second trimester, fetus 5
- O41.02X9 — Oligohydramnios, second trimester, other fetus
- O41.03 — Oligohydramnios, third trimester
- O41.03X0 — Oligohydramnios, third trimester, not applicable or unspecified
- O41.03X1 — Oligohydramnios, third trimester, fetus 1
- O41.03X2 — Oligohydramnios, third trimester, fetus 2
- O41.03X3 — Oligohydramnios, third trimester, fetus 3
- O41.03X4 — Oligohydramnios, third trimester, fetus 4
- O41.03X5 — Oligohydramnios, third trimester, fetus 5
- O41.03X9 — Oligohydramnios, third trimester, other fetus
- O41.1 — Infection of amniotic sac and membranes
- O41.10 — Infection of amniotic sac and membranes, unspecified
- O41.101 — Infection of amniotic sac and membranes, unspecified, first trimester
- O41.1010 — Infection of amniotic sac and membranes, unspecified, first trimester, not applicable or unspecified
- O41.1011 — Infection of amniotic sac and membranes, unspecified, first trimester, fetus 1
- O41.1012 — Infection of amniotic sac and membranes, unspecified, first trimester, fetus 2
- O41.1013 — Infection of amniotic sac and membranes, unspecified, first trimester, fetus 3
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 O42.0
Premature rupture of membranes, onset of labor within 24 hours of rupture
ICD Code O45.0
Premature separation of placenta with coagulation defect