O26.879
✓ BillableCervical shortening, unspecified trimester
Pregnancy, childbirth and the puerperium (O00-O9A)
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • encounter for suspected cervical shortening ruled out (Z03.75)
Clinical Description
ICD-10-CM code O26.879 represents cervical shortening, unspecified trimester. This code falls under the Pregnancy, childbirth and the puerperium (O00-O9A) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 7-character code at the 6th level of specificity. This is the most specific code available in this subcategory. Coders should note that O26.879 has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code O26.879?
ICD-10-CM code O26.879 is "Cervical shortening, unspecified trimester". It belongs to the category: Pregnancy, childbirth and the puerperium (O00-O9A).
Is O26.879 a billable ICD-10 code?
Yes, O26.879 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with O26.879?
O26.879 has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Related Codes in O26.87
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)