ICD-10-CM O40 is the diagnosis code for Polyhydramnios. This code falls under the section "Maternal care related to the fetus and amniotic cavity and possible delivery problems" within Chapter 15 — Pregnancy, childbirth and the puerperium (O00-O9A). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as O40. They are mutually exclusive:
Understanding where O40 sits in the ICD-10-CM classification helps ensure proper coding:
No, O40 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
O40 is the ICD-10-CM diagnosis code for "Polyhydramnios". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
O40 is located in Section O30-O48 — "Maternal care related to the fetus and amniotic cavity and possible delivery problems" within Chapter 15 of the ICD-10-CM Tabular List.
O40 has 4 sub-code(s) that provide more specific detail: O40.1, O40.2, O40.3, O40.9.
Use O40 when the patients documented diagnosis matches "Polyhydramnios" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Polyhydramnios is O40.
No, O40 is non-billable. Use a more specific sub-code for primary diagnosis billing.
O40 is in Chapter 15 of the ICD-10-CM Tabular List.
Type 1 Excludes for O40 include: encounter for suspected maternal and fetal conditions ruled out (Z03.7-).
Yes, O40 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.