N60.99 Unspecified benign mammary dysplasia of unspecified breast

Billable ICD-10-CM code, FY2026.

Applies from N60 Benign mammary dysplasia

Includes

• fibrocystic mastopathy

MS-DRG index

Defines the logic of DRG(s) 600-601 in MDC 09.

Approximate ICD-9-CM (GEMs)

• 610.9 Benign mammary dysplasia, unspecified (approximate)

Code annotations containing back-references to N60.99

Back-references to N60

• Type 2 Excludes: D24 Benign neoplasm of breast ("benign cyst of breast (N60.-)")
• Type 2 Excludes: D24 Benign neoplasm of breast ("benign mammary dysplasia (N60.-)")
• Type 2 Excludes: D24 Benign neoplasm of breast ("fibrocystic disease of breast (N60.-)")

Nearby codes

• N60.82 Other benign mammary dysplasias of left breast
• N60.89 Other benign mammary dysplasias of unspecified breast
• N60.9 Unspecified benign mammary dysplasia
• N60.91 Unspecified benign mammary dysplasia of right breast
• N60.92 Unspecified benign mammary dysplasia of left breast
• N60.99 Unspecified benign mammary dysplasia of unspecified breast (this code)