Maternal care for other conditions predominantly related to pregnancy
In Other maternal disorders predominantly related to pregnancy (O20-O29), chapter 15: Pregnancy, Childbirth and the Puerperium
72 billable codes under O26: 13 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.
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Instructional notes
Also applies, from Other maternal disorders predominantly related to pregnancy (O20-O29)
These notes sit on O20-O29 and apply to every code under it, including O26.
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Coding of obstetric cases with O00-O9A codes: sequencing priority, trimester and fetus characters, principal diagnosis selection, delivery outcome, and pregnancy-related complications.
- General Rules for Obstetric Cases (page 63)
- Selection of OB Principal or First-listed Diagnosis (page 64)
- Pre-existing conditions versus conditions due to the pregnancy (page 65)
- Pre-existing hypertension in pregnancy (page 66)
- Fetal Conditions Affecting the Management of the Mother (page 66)
- HIV Infection in Pregnancy, Childbirth and the Puerperium (page 66)
- Diabetes mellitus in pregnancy (page 66)
- Long term use of insulin and oral hypoglycemics (page 67)
All codes under O26
O26 can't be used on a claim. Pick a billable code below; grey headings group them.
- O26.0Excessive weight gain in pregnancy
- O26.00Excessive weight gain in pregnancy, unspecified trimester
- O26.01Excessive weight gain in pregnancy, first trimester
- O26.02Excessive weight gain in pregnancy, second trimester
- O26.03Excessive weight gain in pregnancy, third trimester
- O26.1Low weight gain in pregnancy
- O26.10Low weight gain in pregnancy, unspecified trimester
- O26.11Low weight gain in pregnancy, first trimester
- O26.12Low weight gain in pregnancy, second trimester
- O26.13Low weight gain in pregnancy, third trimester
- O26.2Pregnancy care for patient with recurrent pregnancy loss
- O26.20Pregnancy care for patient with recurrent pregnancy loss, unspecified trimester
- O26.21Pregnancy care for patient with recurrent pregnancy loss, first trimester
- O26.22Pregnancy care for patient with recurrent pregnancy loss, second trimester
- O26.23Pregnancy care for patient with recurrent pregnancy loss, third trimester
- O26.3Retained intrauterine contraceptive device in pregnancy
- O26.30Retained intrauterine contraceptive device in pregnancy, unspecified trimester
- O26.31Retained intrauterine contraceptive device in pregnancy, first trimester
- O26.32Retained intrauterine contraceptive device in pregnancy, second trimester
- O26.33Retained intrauterine contraceptive device in pregnancy, third trimester
- O26.4Herpes gestationis
- O26.40Herpes gestationis, unspecified trimester
- O26.41Herpes gestationis, first trimester
- O26.42Herpes gestationis, second trimester
- O26.43Herpes gestationis, third trimester
- O26.5Maternal hypotension syndrome
- O26.50Maternal hypotension syndrome, unspecified trimester
- O26.51Maternal hypotension syndrome, first trimester
- O26.52Maternal hypotension syndrome, second trimester
- O26.53Maternal hypotension syndrome, third trimester
- O26.6Liver and biliary tract disorders in pregnancy, childbirth and the puerperium
- O26.61Liver and biliary tract disorders in pregnancy
- O26.611Liver and biliary tract disorders in pregnancy, first trimester
- O26.612Liver and biliary tract disorders in pregnancy, second trimester
- O26.613Liver and biliary tract disorders in pregnancy, third trimester
- O26.619Liver and biliary tract disorders in pregnancy, unspecified trimester
- O26.62Liver and biliary tract disorders in childbirth
- O26.63Liver and biliary tract disorders in the puerperium
- O26.64Intrahepatic cholestasis of pregnancy
- O26.641Intrahepatic cholestasis of pregnancy, first trimester
- O26.642Intrahepatic cholestasis of pregnancy, second trimester
- O26.643Intrahepatic cholestasis of pregnancy, third trimester
- O26.649Intrahepatic cholestasis of pregnancy, unspecified trimester
- O26.7Subluxation of symphysis (pubis) in pregnancy, childbirth and the puerperium
- O26.71Subluxation of symphysis (pubis) in pregnancy
- O26.711Subluxation of symphysis (pubis) in pregnancy, first trimester
- O26.712Subluxation of symphysis (pubis) in pregnancy, second trimester
- O26.713Subluxation of symphysis (pubis) in pregnancy, third trimester
- O26.719Subluxation of symphysis (pubis) in pregnancy, unspecified trimester
- O26.72Subluxation of symphysis (pubis) in childbirth
- O26.73Subluxation of symphysis (pubis) in the puerperium
- O26.8Other specified pregnancy related conditions
- O26.81Pregnancy related exhaustion and fatigue
- O26.811Pregnancy related exhaustion and fatigue, first trimester
- O26.812Pregnancy related exhaustion and fatigue, second trimester
- O26.813Pregnancy related exhaustion and fatigue, third trimester
- O26.819Pregnancy related exhaustion and fatigue, unspecified trimester
- O26.82Pregnancy related peripheral neuritis
- O26.821Pregnancy related peripheral neuritis, first trimester
- O26.822Pregnancy related peripheral neuritis, second trimester
- O26.823Pregnancy related peripheral neuritis, third trimester
- O26.829Pregnancy related peripheral neuritis, unspecified trimester
- O26.83Pregnancy related renal disease
- O26.831Pregnancy related renal disease, first trimester
- O26.832Pregnancy related renal disease, second trimester
- O26.833Pregnancy related renal disease, third trimester
- O26.839Pregnancy related renal disease, unspecified trimester
- O26.84Uterine size-date discrepancy complicating pregnancy
- O26.841Uterine size-date discrepancy, first trimester
- O26.842Uterine size-date discrepancy, second trimester
- O26.843Uterine size-date discrepancy, third trimester
- O26.849Uterine size-date discrepancy, unspecified trimester
- O26.85Spotting complicating pregnancy
- O26.851Spotting complicating pregnancy, first trimester
- O26.852Spotting complicating pregnancy, second trimester
- O26.853Spotting complicating pregnancy, third trimester
- O26.859Spotting complicating pregnancy, unspecified trimester
- O26.86Pruritic urticarial papules and plaques of pregnancy (PUPPP)
- O26.87Cervical shortening
- O26.872Cervical shortening, second trimester
- O26.873Cervical shortening, third trimester
- O26.879Cervical shortening, unspecified trimester
- O26.89Other specified pregnancy related conditions
- O26.891Other specified pregnancy related conditions, first trimester
- O26.892Other specified pregnancy related conditions, second trimester
- O26.893Other specified pregnancy related conditions, third trimester
- O26.899Other specified pregnancy related conditions, unspecified trimester
- O26.9Pregnancy related conditions, unspecified
- O26.90Pregnancy related conditions, unspecified, unspecified trimester
- O26.91Pregnancy related conditions, unspecified, first trimester
- O26.92Pregnancy related conditions, unspecified, second trimester
- O26.93Pregnancy related conditions, unspecified, third trimester
O26 MS-DRGs
As the principal diagnosis, the billable codes under O26 group to these 8 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 817 Other Antepartum Diagnoses with O.R. Procedures with MCC (68 of 72 codes)
- DRG 818 Other Antepartum Diagnoses with O.R. Procedures with CC (68 of 72 codes)
- DRG 819 Other Antepartum Diagnoses with O.R. Procedures without CC/MCC (68 of 72 codes)
- DRG 831 Other Antepartum Diagnoses without O.R. Procedures with MCC (68 of 72 codes)
- DRG 832 Other Antepartum Diagnoses without O.R. Procedures with CC (68 of 72 codes)
- DRG 833 Other Antepartum Diagnoses without O.R. Procedures without CC/MCC (68 of 72 codes)
- DRG 769 Postpartum and Post Abortion Diagnoses with O.R. Procedures (2 of 72 codes)
- DRG 776 Postpartum and Post Abortion Diagnoses without O.R. Procedures (2 of 72 codes)
Other codes that refer to O26
Notes on these codes point to O26.
- Z03.7 Excludes1: known or suspected fetal anomalies affecting management of mother, not ruled out (O26.-, O35.-, O36.-, O40.-, O41.-)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Health Problems in Pregnancy
A health problem in pregnancy is any disease or condition that could affect your health or the health of your fetus. Some health problems may make it more likely that you will have a high-risk pregnancy. A high-risk pregnancy is one in which you, your fetus, or both are at higher risk for health problems than in a typical pregnancy.
Read more about health problems in pregnancy on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.
