MICHAEL D MASTERSON, MD, A MEDICAL CORPORATION
NPI 1669671731
Internal Medicine - Medical Oncology in Thousand Oaks, CA

Q: What is Michael D Masterson, MD's NPI number?

The NPI number for Michael D Masterson, MD is 1669671731. It was assigned to this organization in the NPPES registry on July 17, 2007.

Q: What is Michael D Masterson, MD's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Active since July 17, 2007

227 W JANSS RD, SUITE 280, THOUSAND OAKS, CA 91360(805) 496-1360(805) 496-8270 Get Directions Write a Review

NPPES record last updated: January 18, 2011. Verified against the NPPES registry weekly; last sync: July 19, 2026.

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About Michael D Masterson, Md, A Medical Corporation NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MICHAEL D MASTERSON, MD, A MEDICAL CORPORATION (NPI 1669671731) is a healthcare organization registered as a medical oncology in Thousand Oaks, California and active in the NPI registry since July 2007. The organization lists Jamie Lee Kelly, Practice Manager, as its authorized official.

NPPES Registry Identity

NPI1669671731

Entity TypeOrganization

Primary Taxonomy207RX0202X

Legal Business NameMICHAEL D MASTERSON, MD

Location Address227 W JANSS RD, SUITE 280Thousand Oaks, CA 91360-1848

Mailing Address227 W Janss Rd, Suite 280Thousand Oaks, CA 91360-1848 · (805) 496-1360 · Fax (805) 496-8270

Phone(805) 496-1360

Fax(805) 496-8270

Organization SubpartNo

Authorized OfficialJamie Lee KellyPractice Manager · (805) 496-1360

Enumeration DateJuly 17, 2007

Last NPPES UpdateJanuary 18, 2011

✔ NPI 1669671731 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RX0202X

License✔ Licensed in CA · G27552

Definition

An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.

Also ListedInternal Medicine · HematologyTaxonomy 207RH0000X · License G27552 (CA)

227 W JANSS RD, Thousand Oaks, CA 91360

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Other Names 1

Doing Business AsMichael D Masterson, Md, A Medical Corporation

Other Identifiers 3

Medicare PINW22342CA

Medicare UPINW22342CA

OtherG27552CA · Medical License

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. PAUL RONALD BLOCK M.D.

Internal Medicine (Pulmonary Disease)

227 W JANSS RD, STE 305
THOUSAND OAKS, CA 91360

Ventura County (805) 449-4181

DR. LAWRENCE ARTHUR BAKER M.D.

Internal Medicine (Pulmonary Disease)

227 W JANSS RD, STE 250
THOUSAND OAKS, CA 91360

Ventura County (805) 497-7508

DR. PHILIP L. BARRY MD

Orthopaedic Surgery

227 W JANSS RD, SUITE 320
THOUSAND OAKS, CA 91360

Ventura County (805) 497-2500

DR. PAUL FINKEL M.D.

Internal Medicine (Nephrology)

227 W JANSS RD, SUITE 110
THOUSAND OAKS, CA 91360

Ventura County (805) 496-6051

HARRY SAMUEL MENCO MD

Internal Medicine (Hematology & Oncology)

227 W JANSS RD, # 310
THOUSAND OAKS, CA 91360

Ventura County (805) 496-2949

DR. RUTH L POLAN MD

Radiology (Diagnostic Radiology)

227 W JANSS RD, SUITE 150
THOUSAND OAKS, CA 91360

Ventura County (805) 496-7755

DR. HARRY J COZEN M.D.

Anesthesiology

227 W JANSS RD
THOUSAND OAKS, CA 91360

Ventura County (805) 371-0455

BLOCK, BAKER & GONZALEZ A MEDICAL CORPORATION

Clinic/Center (Primary Care)

227 W JANSS RD, 250
THOUSAND OAKS, CA 91360

Ventura County (805) 497-7508

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Michael D Masterson, MD's NPI number?

The NPI number for Michael D Masterson, MD is 1669671731. It was assigned to this organization in the NPPES registry on July 17, 2007.

Where is Michael D Masterson, MD located?

Michael D Masterson, MD is located at 227 W Janss Rd Suite 280, Thousand Oaks, CA 91360. The listed phone number is (805) 496-1360.

What is Michael D Masterson, MD's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

When was this NPI record last updated?

The NPPES record for Michael D Masterson, MD was last updated on January 18, 2011. NPI Profile syncs with the weekly NPPES data releases published by CMS.