O26.00 – Excessive weight gain in pregnancy, unspecified trimester

ICD-10-CM 2027 diagnosis code · Other maternal disorders predominantly related to pregnancy

Billable code

ICD-10-CM code O26.00

Code: O26.00 (claims format: O2600)
Description: Excessive weight gain in pregnancy, unspecified trimester
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block: O20-O29 Other maternal disorders predominantly related to pregnancy
Parent codes: O26 › O26.0

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

O26.0 – Excessive weight gain in pregnancy

Excludes2 (not included here):

gestational edema (O12.0, O12.2)

Block O20-O29

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)

Related codes in O26.0

Frequently asked questions

What is ICD-10 code O26.00?

O26.00 is the ICD-10-CM code for excessive weight gain in pregnancy, unspecified trimester, in the block O20-O29 (Other maternal disorders predominantly related to pregnancy).

Is O26.00 a billable code?

Yes. O26.00 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does O26.00 belong to?

It belongs to category O26 – Maternal care for other conditions predominantly related to pregnancy.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.