ICD-10-CM 2027
ICD-10 code for hydatidiform mole
From the official ICD-10-CM alphabetic index entry “Hydatidiform mole (benign) (complicating pregnancy) (delivered) (undelivered)”. Page updated September 29, 2026.
About coding hydatidiform mole
The ICD-10-CM code for hydatidiform mole is O01.9 (Hydatidiform mole, unspecified). The official index lists 6 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on O01.9.
Within O01, choose O01.9 (unspecified) only when documentation doesn't support a more specific option: classical hydatidiform mole (O01.0) and incomplete and partial hydatidiform mole (O01.1).
Use an additional code from category O08 to identify any associated complication.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific hydatidiform mole codes (official index)
- classical O01.0 — Classical hydatidiform mole
- complete O01.0 — Classical hydatidiform mole
- incomplete O01.1 — Incomplete and partial hydatidiform mole
- invasive D39.2 — Neoplasm of uncertain behavior of placenta
- malignant D39.2 — Neoplasm of uncertain behavior of placenta
- partial O01.1 — Incomplete and partial hydatidiform mole
Common questions about hydatidiform mole ICD-10 codes
What is the ICD-10 code for hydatidiform mole?
- O01.9 — Hydatidiform mole, unspecified. More specific codes apply when the documentation supports them: O01.0, O01.0, O01.1, D39.2 and others below.
What is the ICD-10 code for classical hydatidiform mole?
- O01.0 — Classical hydatidiform mole.
What is the ICD-10 code for complete hydatidiform mole?
- O01.0 — Classical hydatidiform mole.
What is the ICD-10 code for incomplete hydatidiform mole?
- O01.1 — Incomplete and partial hydatidiform mole.
What is the ICD-10 code for invasive hydatidiform mole?
- D39.2 — Neoplasm of uncertain behavior of placenta.
What is the ICD-10 code for malignant hydatidiform mole?
- D39.2 — Neoplasm of uncertain behavior of placenta.
What is the ICD-10 code for partial hydatidiform mole?
- O01.1 — Incomplete and partial hydatidiform mole.
Is O01.9 billable?
- Yes. O01.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can O01.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict O01.9 as a principal diagnosis.
Is O01.9 a CC or MCC?
- No. O01.9 is neither a CC nor an MCC under MS-DRG v44.0.