N85.3 Subinvolution of uterus

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• puerperal subinvolution of uterus (O90.89)

Applies from N85 Other noninflammatory disorders of uterus, except cervix

Excludes1 (never code together)

• endometriosis (N80.-)
• inflammatory diseases of uterus (N71.-)
• noninflammatory disorders of cervix, except malposition (N86-N88)
• polyp of corpus uteri (N84.0)
• uterine prolapse (N81.-)

MS-DRG index

Defines the logic of DRG(s) 742-743 in MDC 13.

Approximate ICD-9-CM (GEMs)

• 621.1 Chronic subinvolution of uterus (approximate)

Diagnosis Index entries for N85.3

• Bleeding › due to uterine subinvolution
• Congestion, congestive › uterus › with subinvolution
• Subinvolution › uterus (chronic) (nonpuerperal)

Nearby codes

• N85.0 Endometrial hyperplasia
• N85.00 Endometrial hyperplasia, unspecified
• N85.01 Benign endometrial hyperplasia
• N85.02 Endometrial intraepithelial neoplasia [EIN]
• N85.2 Hypertrophy of uterus
• N85.3 Subinvolution of uterus (this code)
• N85.4 Malposition of uterus
• N85.5 Inversion of uterus
• N85.6 Intrauterine synechiae
• N85.7 Hematometra
• N85.8 Other specified noninflammatory disorders of uterus