O99.03 Anemia complicating the puerperium

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• postpartum anemia not pre-existing prior to delivery (O90.81)

Applies from O99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

Includes

• conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care

Excludes2 (not included here)

• when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)

Use additional code

• code to identify specific condition

Applies from O99.0 Anemia complicating pregnancy, childbirth and the puerperium

Applicable to

• Conditions in D50-D64

Excludes1 (never code together)

• anemia arising in the puerperium (O90.81)
• postpartum anemia NOS (O90.81)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 648.22 Anemia of mother, delivered, with mention of postpartum complication (approximate)
• 648.24 Anemia of mother, 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 O99.03

Back-references to O99.03

• Type 1 Excludes: O90.81 Anemia of the puerperium ("pre-existing anemia complicating the puerperium (O99.03)")

Diagnosis Index entries for O99.03

• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › anemia (conditions in D50-D64) (pre-existing) › complicating the puerperium
• Puerperal, puerperium (complicated by, complications) › anemia › pre-existing (pre-pregnancy)
• Puerperal, puerperium (complicated by, complications) › disease › Valsuani's
• Valsuani's disease

Nearby codes

• O99.011 Anemia complicating pregnancy, first trimester
• O99.012 Anemia complicating pregnancy, second trimester
• O99.013 Anemia complicating pregnancy, third trimester
• O99.019 Anemia complicating pregnancy, unspecified trimester
• O99.02 Anemia complicating childbirth
• O99.03 Anemia complicating the puerperium (this code)
• O99.1 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium
• O99.11 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy
• O99.111 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, first trimester
• O99.112 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, second trimester
• O99.113 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, third trimester