O26.12 Low weight gain in pregnancy, second trimester

✓ Billable ICD-10-CM 2026
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The ICD-10-CM code for Low weight gain in pregnancy, second trimester is O26.12 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
O20-O29: Other maternal disorders predominantly related to pregnancy (O20-O29)
Category O26
93 codes (72 billable)
FY2026 Status
Stable since FY2024

U.S. Hospital Utilization

  • An estimated 65 U.S. inpatient stays in 2023 included O26.12 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

References

Related Codes

Parent Code

O26 Maternal care for other conditions predominantly related to pregnancy

Related Codes in O26

O26 Maternal care for other conditions predominantly related to pregnancy O26.0 Excessive weight gain in pregnancy O26.00 Excessive weight gain in pregnancy, unspecified trimester O26.01 Excessive weight gain in pregnancy, first trimester O26.02 Excessive weight gain in pregnancy, second trimester O26.03 Excessive weight gain in pregnancy, third trimester O26.1 Low weight gain in pregnancy O26.10 Low weight gain in pregnancy, unspecified trimester O26.11 Low weight gain in pregnancy, first trimester O26.13 Low weight gain in pregnancy, third trimester O26.2 Pregnancy care for patient with recurrent pregnancy loss O26.20 Pregnancy care for patient with recurrent pregnancy loss, unspecified trimester O26.21 Pregnancy care for patient with recurrent pregnancy loss, first trimester O26.22 Pregnancy care for patient with recurrent pregnancy loss, second trimester O26.23 Pregnancy care for patient with recurrent pregnancy loss, third trimester O26.3 Retained intrauterine contraceptive device in pregnancy O26.30 Retained intrauterine contraceptive device in pregnancy, unspecified trimester O26.31 Retained intrauterine contraceptive device in pregnancy, first trimester O26.32 Retained intrauterine contraceptive device in pregnancy, second trimester O26.33 Retained intrauterine contraceptive device in pregnancy, third trimester
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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