ICD-10 code for Paramesonephric duct cyst

The ICD-10-CM code for Paramesonephric duct cyst is Q50.4 (Embryonic cyst of fallopian tube). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Q50.4.

Within Q50 (congenital malformations of ovaries, fallopian tubes and broad ligaments), Q50.4 is specifically for Embryonic cyst of fallopian tube. Related codes cover congenital absence of ovary (Q50.0), developmental ovarian cyst (Q50.1), congenital torsion of ovary (Q50.2), other congenital malformations of ovary (Q50.3), Embryonic cyst of broad ligament (Q50.5) and other congenital malformations of fallopian tube and broad ligament (Q50.6).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 742 (Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC, relative weight 1.8456), DRG 743 (Uterine and Adnexa Procedures for Non-Malignancy without CC/MCC, relative weight 1.2974), DRG 760 (Menstrual and Other Female Reproductive System Disorders with CC/MCC, relative weight 1.0129) and DRG 761 (Menstrual and Other Female Reproductive System Disorders without CC/MCC, relative weight 0.7041), in MDC 13 (Diseases and Disorders of the Female Reproductive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.