O40.25 is the authoritative medical code for Polyhydramnios, second trimester, fetus 5. This classification is used in medical billing and clinical recording to specify the clinical criteria for polyhydramnios, second trimester, fetus 5 (ICD-10-CM O40.25), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Polyhydramnios, second trimester, fetus 5 is a billable ICD-10-CM diagnosis code O40.25. Includes: hydramnios. 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 O40. 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 O40 that has a 7th character of 1 through 9..
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for O40.25 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
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
Does O40.25 require a 7th character?
Yes. One of the following 7th characters is to be assigned to each code under category O40. 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 O40 that has a 7th character of 1 through 9..
What can't be coded together with O40.25?
Per Excludes1 instructions, O40.25 must not be reported with: encounter for suspected maternal and fetal conditions ruled out (Z03.7-).
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as O40.25, with their registry titles.
- O40 — Polyhydramnios
- O40.1 — Polyhydramnios, first trimester
- O40.10 — Polyhydramnios, first trimester, not applicable or unspecified
- O40.11 — Polyhydramnios, first trimester, fetus 1
- O40.12 — Polyhydramnios, first trimester, fetus 2
- O40.13 — Polyhydramnios, first trimester, fetus 3
- O40.14 — Polyhydramnios, first trimester, fetus 4
- O40.15 — Polyhydramnios, first trimester, fetus 5
- O40.19 — Polyhydramnios, first trimester, other fetus
- O40.1XX0 — Polyhydramnios, first trimester, not applicable or unspecified
- O40.1XX1 — Polyhydramnios, first trimester, fetus 1
- O40.1XX2 — Polyhydramnios, first trimester, fetus 2
- O40.1XX3 — Polyhydramnios, first trimester, fetus 3
- O40.1XX4 — Polyhydramnios, first trimester, fetus 4
- O40.1XX5 — Polyhydramnios, first trimester, fetus 5
- O40.1XX9 — Polyhydramnios, first trimester, other fetus
- O40.2 — Polyhydramnios, second trimester
- O40.20 — Polyhydramnios, second trimester, not applicable or unspecified
- O40.21 — Polyhydramnios, second trimester, fetus 1
- O40.22 — Polyhydramnios, second trimester, fetus 2
- O40.23 — Polyhydramnios, second trimester, fetus 3
- O40.24 — Polyhydramnios, second trimester, fetus 4
- O40.29 — Polyhydramnios, second trimester, other fetus
- O40.2XX0 — Polyhydramnios, second trimester, not applicable or unspecified
- O40.2XX1 — Polyhydramnios, second trimester, fetus 1
- O40.2XX2 — Polyhydramnios, second trimester, fetus 2
- O40.2XX3 — Polyhydramnios, second trimester, fetus 3
- O40.2XX4 — Polyhydramnios, second trimester, fetus 4
- O40.2XX5 — Polyhydramnios, second trimester, fetus 5
- O40.2XX9 — Polyhydramnios, second trimester, other fetus
- O40.3 — Polyhydramnios, third trimester
- O40.30 — Polyhydramnios, third trimester, not applicable or unspecified
- O40.31 — Polyhydramnios, third trimester, fetus 1
- O40.32 — Polyhydramnios, third trimester, fetus 2
- O40.33 — Polyhydramnios, third trimester, fetus 3
- O40.34 — Polyhydramnios, third trimester, fetus 4
- O40.35 — Polyhydramnios, third trimester, fetus 5
- O40.39 — Polyhydramnios, third trimester, other fetus
- O40.3XX0 — Polyhydramnios, third trimester, not applicable or unspecified
- O40.3XX1 — Polyhydramnios, third trimester, fetus 1
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 O35.25
Maternal care for (suspected) hereditary disease in fetus, fetus 5