O99.02 Anemia complicating childbirth

Billable ICD-10-CM code, FY2026.

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) 998 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 648.21 Anemia of mother, delivered, with or without mention of antepartum condition (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.

Diagnosis Index entries for O99.02

• Delivery (childbirth) (labor) › complicated › by › anemia (pre-existing)
• Pregnancy (single) (uterine) › complicated by (care of) (management affected by) › anemia (conditions in D50-D64) (pre-existing) › complicating childbirth

Nearby codes

• O99.01 Anemia complicating pregnancy
• 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 (this code)
• O99.03 Anemia complicating the puerperium
• 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