O91.21 - Nonpurulent mastitis associated with pregnancy

The ICD 10 Code for Nonpurulent mastitis associated with pregnancy is listed as O91.21.
Additional information concerning this code and description can be found below including ICD 9 crosswalks / GEMS, chapter information, and DRGs where available.

ICD 10 CM Field	Value
Diagnosis Code:	O91.21
Description:	Nonpurulent mastitis associated with pregnancy Gestational interstitial mastitis Gestational lymphangitis of breast Gestational mastitis NOS Gestational parenchymatous mastitis

Chapter	Pregnancy, childbirth and the puerperium (O00-O9A)
Block	Complications predominantly related to the puerperium (O85-O92)
Parent	O91.2 - Nonpurulent mastitis associated with pregnancy, the puerperium and lactation
ICD-10-CM Children (deeper level / typically more specific) of O91.21:
O91.211 - Nonpurulent mastitis associated with pregnancy, first trimester
O91.212 - Nonpurulent mastitis associated with pregnancy, second trimester
O91.213 - Nonpurulent mastitis associated with pregnancy, third trimester
O91.219 - Nonpurulent mastitis associated with pregnancy, unspecified trimester
ICD-10-CM Siblings (same level / similar specificity) of O91.21:
O91.22 - Nonpurulent mastitis associated with the puerperium
O91.23 - Nonpurulent mastitis associated with lactation