O91.21
O91.21: Nonpurulent mastitis associated with pregnancy
Non-billable headerICD-10-CM
O91.21 is a non-billable header ICD-10-CM code for nonpurulent mastitis associated with pregnancy. It cannot be billed on its own: choose one of the more specific child codes below.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Gestational interstitial mastitis
- Gestational lymphangitis of breast
- Gestational mastitis NOS
- Gestational parenchymatous mastitis
Other codes that can never be billed with O91.21
Their own Excludes1 notes name this code, so the conflict is not listed above.
- N61Inflammatory disorders of breast
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead O91.21
4 child codes. Green means billable.