O26.10 is the authoritative medical code for Low weight gain in pregnancy, unspecified trimester. This classification is used in medical billing and clinical recording to specify the clinical criteria for low weight gain in pregnancy, unspecified trimester (ICD-10-CM O26.10), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Low weight gain in pregnancy, unspecified trimester is a billable ICD-10-CM diagnosis code O26.10. Excludes2 (not included here): 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.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for O26.10 in the official ICD-10-CM tabular list.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- 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
Frequently Asked Questions (FAQ) & Clinical Guidance
Can O26.10 be reported alongside related conditions?
Per Excludes2 instructions, O26.10 and the following may both be reported when both are present: 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).
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as O26.10, with their registry titles.
- O26 — Maternal care for other conditions predominantly related to pregnancy
- O26.0 — Excessive weight gain in pregnancy
- 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
- O26.11 — Low weight gain in pregnancy, first trimester
- O26.12 — Low weight gain in pregnancy, second 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
- O26.4 — Herpes gestationis
- O26.40 — Herpes gestationis, unspecified trimester
- O26.41 — Herpes gestationis, first trimester
- O26.42 — Herpes gestationis, second trimester
- O26.43 — Herpes gestationis, third trimester
- O26.5 — Maternal hypotension syndrome
- O26.50 — Maternal hypotension syndrome, unspecified trimester
- O26.51 — Maternal hypotension syndrome, first trimester
- O26.52 — Maternal hypotension syndrome, second trimester
- O26.53 — Maternal hypotension syndrome, third trimester
- O26.6 — Liver and biliary tract disorders in pregnancy, childbirth and the puerperium
- O26.61 — Liver and biliary tract disorders in pregnancy
- O26.611 — Liver and biliary tract disorders in pregnancy, first trimester
- O26.612 — Liver and biliary tract disorders in pregnancy, second trimester
- O26.613 — Liver and biliary tract disorders in pregnancy, third trimester
- O26.619 — Liver and biliary tract disorders in pregnancy, unspecified trimester
- O26.62 — Liver and biliary tract disorders in childbirth
- O26.63 — Liver and biliary tract disorders in the puerperium
- O26.64 — Intrahepatic cholestasis of pregnancy
- O26.641 — Intrahepatic cholestasis of pregnancy, first trimester
- O26.642 — Intrahepatic cholestasis of pregnancy, second trimester
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code O30.10
Triplet pregnancy, unspecified number of placenta and unspecified number of amniotic sacs
ICD Code O31.10
Continuing pregnancy after spontaneous abortion of one fetus or more, unspecified trimester