D19.9 Benign neoplasm of mesothelial tissue, unspecified

Billable ICD-10-CM code, FY2026.

Applicable to

• Benign mesothelioma NOS

MS-DRG index

Defines the logic of DRG(s) 826-828 in MDC 17.

Approximate ICD-9-CM (GEMs)

• 229.9 Benign neoplasm of unspecified site (approximate)

Code annotations containing back-references to D19.9

Back-references to D19

• Type 1 Excludes: D15 Benign neoplasm of other and unspecified intrathoracic organs ("benign neoplasm of mesothelial tissue (D19.-)")
• Type 1 Excludes: D20 Benign neoplasm of soft tissue of retroperitoneum and peritoneum ("benign neoplasm of mesothelial tissue (D19.-)")

Diagnosis Index entries for D19.9

• Mesothelioma (malignant) › benign › unspecified site
• Mesothelioma (malignant) › biphasic › benign › unspecified site
• Mesothelioma (malignant) › epithelioid › benign › unspecified site
• Mesothelioma (malignant) › fibrous › benign › unspecified site

Nearby codes

• D19 Benign neoplasm of mesothelial tissue
• D19.0 Benign neoplasm of mesothelial tissue of pleura
• D19.1 Benign neoplasm of mesothelial tissue of peritoneum
• D19.7 Benign neoplasm of mesothelial tissue of other sites
• D19.9 Benign neoplasm of mesothelial tissue, unspecified (this code)