O86.12 Endometritis following delivery

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from O86 Other puerperal infections

Excludes2 (not included here)

• infection during labor (O75.3)
• obstetrical tetanus (A34)

Use additional code

• code (B95-B97), to identify infectious agent

MS-DRG index

Defines the logic of DRG(s) 769 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 670.12 Puerperal endometritis, delivered, with mention of postpartum complication (approximate)
• 670.14 Puerperal endometritis, postpartum condition or complication (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Maternity diagnoses (age 9 through 64): Age conflict edit. These diagnoses are clinically expected only in patients age 9 through 64.

Code annotations containing back-references to O86.12

Back-references to O86.1

• Type 2 Excludes: O85 Puerperal sepsis ("genital tract infection following delivery (O86.1-)")
• Type 2 Excludes: O99.8 Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium ("infection of genitourinary tract following delivery (O86.1-O86.4)")

Back-references to O86

• Type 1 Excludes: N71 Inflammatory disease of uterus, except cervix ("infection of uterus following delivery (O85, O86.-)")
• Type 2 Excludes: O75 Other complications of labor and delivery, not elsewhere classified ("puerperal (postpartum) infection (O86.-)")
• Type 2 Excludes: O98 Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium ("puerperal infection (O86.-)")

Diagnosis Index entries for O86.12

• Endometritis (decidual) (nonspecific) (purulent) (senile) (atrophic) (suppurative) › puerperal, postpartum, childbirth
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › endometritis
• Puerperal, puerperium (complicated by, complications) › abscess › uterus
• Puerperal, puerperium (complicated by, complications) › perimetritis
• Puerperal, puerperium (complicated by, complications) › pyometra

Nearby codes

• O86.03 Infection of obstetric surgical wound, organ and space site
• O86.04 Sepsis following an obstetrical procedure
• O86.09 Infection of obstetric surgical wound, other surgical site
• O86.1 Other infection of genital tract following delivery
• O86.11 Cervicitis following delivery
• O86.12 Endometritis following delivery (this code)
• O86.13 Vaginitis following delivery
• O86.19 Other infection of genital tract following delivery
• O86.2 Urinary tract infection following delivery
• O86.20 Urinary tract infection following delivery, unspecified
• O86.21 Infection of kidney following delivery