O03.1 Delayed or excessive hemorrhage following incomplete spontaneous abortion

Billable ICD-10-CM code, FY2026.

Applicable to

• Afibrinogenemia following incomplete spontaneous abortion
• Defibrination syndrome following incomplete spontaneous abortion
• Hemolysis following incomplete spontaneous abortion
• Intravascular coagulation following incomplete spontaneous abortion

Applies from O03 Spontaneous abortion

Includes

• miscarriage

Notes

• Incomplete abortion includes retained products of conception following spontaneous abortion

MS-DRG index

Defines the logic of DRG(s) 770 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 634.11 Spontaneous abortion, complicated by delayed or excessive hemorrhage, incomplete

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 O03.1

Back-references to O03.1

• Type 1 Excludes: O08.1 Delayed or excessive hemorrhage following ectopic and molar pregnancy ("delayed or excessive hemorrhage due to incomplete abortion (O03.1)")

Back-references to O03

• Type 1 Excludes: D65 Disseminated intravascular coagulation [defibrination syndrome] ("abortion or ectopic or molar pregnancy (O00-O07, O08.1)")
• Type 2 Excludes: D68 Other coagulation defects ("coagulation defects complicating abortion or ectopic or molar pregnancy (O00-O07, O08.1)")
• Type 1 Excludes: G08 Intracranial and intraspinal phlebitis and thrombophlebitis ("abortion, ectopic or molar pregnancy (O00-O07, O08.7)")
• Type 2 Excludes: I26 Pulmonary embolism ("pulmonary embolism complicating abortion, ectopic or molar pregnancy (O00-O07, O08.2)")
• Code First: I47 Paroxysmal tachycardia ("abortion or ectopic or molar pregnancy (O00-O07, O08.8)")
• Code First: I49 Other cardiac arrhythmias ("abortion or ectopic or molar pregnancy (O00-O07, O08.8)")
• Code First: I50 Heart failure ("heart failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.8)")
• Code First: I74 Arterial embolism and thrombosis ("embolism and thrombosis complicating abortion or ectopic or molar pregnancy (O00-O07, O08.2)")
• Code First: I80 Phlebitis and thrombophlebitis (", if applicable: phlebitis and thrombophlebitis complicating abortion, ectopic or molar pregnancy (O00-O07, O08.7)")
• Code First: I82 Other venous embolism and thrombosis ("abortion, ectopic or molar pregnancy (O00-O07, O08.7)")
• Type 1 Excludes: K65 Peritonitis ("peritonitis with or following abortion or ectopic or molar pregnancy (O00-O07, O08.0)")
• Type 2 Excludes: K72 Hepatic failure, not elsewhere classified ("hepatic failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.8)")
• Type 1 Excludes: O20 Hemorrhage in early pregnancy ("pregnancy with abortive outcome (O00-O08)")
• Type 1 Excludes: R34 Anuria and oliguria ("anuria and oliguria complicating abortion or ectopic or molar pregnancy (O00-O07, O08.4)")
• Type 1 Excludes: R55 Syncope and collapse ("shock complicating or following abortion or ectopic or molar pregnancy (O00-O07, O08.3)")
• Type 1 Excludes: R57 Shock, not elsewhere classified ("shock complicating or following ectopic or molar pregnancy (O00-O07, O08.3)")
• Type 1 Excludes: T79.0 Air embolism (traumatic) ("air embolism complicating abortion or ectopic or molar pregnancy (O00-O07, O08.2)")
• Type 1 Excludes: T79.1 Fat embolism (traumatic) ("abortion or ectopic or molar pregnancy (O00-O07, O08.2)")
• Type 1 Excludes: T79.4 Traumatic shock ("shock complicating abortion or ectopic or molar pregnancy (O00-O07, O08.3)")
• Type 1 Excludes: T81.1 Postprocedural shock ("shock following abortion or ectopic or molar pregnancy (O00-O07, O08.3)")
• Type 1 Excludes: T81.7 Vascular complications following a procedure, not elsewhere classified ("embolism complicating abortion or ectopic or molar pregnancy (O00-O07, O08.2)")
• Type 1 Excludes: Z33.2 Encounter for elective termination of pregnancy ("spontaneous abortion (O03)")

Diagnosis Index entries for O03.1

• Abortion (complete) (spontaneous) › incomplete (spontaneous) › complicated (by) (following) › afibrinogenemia
• Abortion (complete) (spontaneous) › incomplete (spontaneous) › complicated (by) (following) › defibrination syndrome
• Abortion (complete) (spontaneous) › incomplete (spontaneous) › complicated (by) (following) › hemolysis
• Abortion (complete) (spontaneous) › incomplete (spontaneous) › complicated (by) (following) › hemorrhage (delayed) (excessive)
• Abortion (complete) (spontaneous) › incomplete (spontaneous) › complicated (by) (following) › intravascular coagulation

Nearby codes

• O03 Spontaneous abortion
• O03.0 Genital tract and pelvic infection following incomplete spontaneous abortion
• O03.1 Delayed or excessive hemorrhage following incomplete spontaneous abortion (this code)
• O03.2 Embolism following incomplete spontaneous abortion
• O03.3 Other and unspecified complications following incomplete spontaneous abortion
• O03.30 Unspecified complication following incomplete spontaneous abortion
• O03.31 Shock following incomplete spontaneous abortion
• O03.32 Renal failure following incomplete spontaneous abortion