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ICD-10 O26.13 - Low weight gain in pregnancy, third trimester
Chapter 15 Section O20-O29

O26.13

ICD-10 Billable

Low weight gain in pregnancy, third trimester

Use additional code: code from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known. (per Chapter 15)
From Chapter 15:
  • supervision of normal pregnancy (Z34.-)
From Section O20-O29:
  • maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
  • maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)
From Chapter 15:
  • mental and behavioral disorders associated with the puerperium (F53)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)
From Chapter 15:
  • 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
This ICD-10 code translates to more than one ICD-9 code:

646.81

ICD-9 Billable

Other specified complications of pregnancy, delivered, with or without mention of antepartum condition

646.83

ICD-9 Billable

Other specified complications of pregnancy, antepartum condition or complication