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

Michael Denis Masterson, MD

Individual provider Medical Oncology Physician · NPI 1649240052

Michael Denis Masterson, MD is a Medical Oncology Physician in Westlake Village, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1250 La Venta Ste 202
Westlake Village, CA 91361
Phone: (805) 496-5153
Fax: (805) 496-5202
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 number1649240052
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 26, 2006
Last updated in NPPESFebruary 3, 2015