Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Michael D Masterson, MD

Organization Hematology (Internal Medicine) Physician · NPI 1669671731

Michael D Masterson, MD is a Hematology (Internal Medicine) Physician in Thousand Oaks, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
Specialties on file
2

Practice location Address checks out

227 W Janss Rd Ste 280
Thousand Oaks, CA 91360-1848
Phone: (805) 496-1360
Fax: (805) 496-8270
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence G27552 (CA)
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence G27552 (CA)

Record details

NPI number1669671731
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Jamie Kelly — Practice Manager · (805) 496-1360
Other names Michael D Masterson, Md, A Medical Corporation
NPI enumeratedJuly 17, 2007
Last updated in NPPESJanuary 18, 2011
Mailing address227 W Janss Rd, Suite 280, Thousand Oaks, CA 91360-1848