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ICD-10-CM tabular list

Chapter 15: Pregnancy, childbirth and the puerperium

O00-O9A

Chapter 15 of the ICD-10-CM tabular list covers pregnancy, childbirth and the puerperium, codes O00-O9A. It holds 3,023 codes across 9 blocks, of which 2,437 are billable and 586 are header codes that cannot go on a claim. 1,453 (48%) require a 7th character.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • supervision of normal pregnancy (Z34.-)

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)

Use additional code

Add a secondary code to capture the detail described below.

  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Notes

Additional guidance from the ICD-10-CM tabular list.

  • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • 1st trimester- less than 14 weeks 0 days
  • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • 3rd trimester- 28 weeks 0 days until delivery

Blocks in this chapter

ICD-10-CMFY2026-Apr· effective April 1, 2026