ICD-10-CM Diagnosis Code (2025)
Official Description for O91.21
Nonpurulent mastitis associated with pregnancy
Coding Notes & Guidelines for O91.21
Inclusion Terms
- Gestational interstitial mastitis
- Gestational lymphangitis of breast
- Gestational mastitis NOS
- Gestational parenchymatous mastitis
Parent Code (Less Specific):
About ICD-10-CM Code O91.21 (Nonpurulent mastitis associated with pregnancy)
ICD-10-CM code O91.21 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM O91.21 became effective on October 1, 2024.
This page provides detailed information about O91.21 - Nonpurulent mastitis associated with pregnancy. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Nonpurulent mastitis associated with pregnancy.