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MICHAEL DENIS MASTERSON M.D.
NPI 1649240052
Internal Medicine - Medical Oncology in Westlake Village, CA

Active since January 26, 2006PECOS Enrolled
1250 LA VENTA, SUITE 202, WESTLAKE VILLAGE, CA 91361(805) 496-5153(805) 496-5202 Get Directions Write a Review

NPPES record last updated: February 3, 2015. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Michael Denis Masterson M.d. NPPES

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

MICHAEL DENIS MASTERSON M.D. (NPI 1649240052) is an individual medical oncology provider in Westlake Village, California, licensed in California (G27552) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1649240052
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameMICHAEL DENIS MASTERSONCredential: M.D.
Location Address1250 LA VENTA, SUITE 202Westlake Village, CA 91361
Mailing Address1250 La Venta, Suite 202Westlake Village, CA 91361 · (805) 496-5153 · Fax (805) 496-5202
Phone(805) 496-5153
Fax(805) 496-5202
Sole ProprietorYes
Enumeration DateJanuary 26, 2006
Last NPPES UpdateFebruary 3, 2015
✔ NPI 1649240052 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)
1250 LA VENTA, Westlake Village, CA 91361
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Other Names 1

Other Name (5)Michael Denis Masterson M.d.

Other Identifiers 4

Medicare UPINW22342CA
OtherWG27552ACA · Medicare Ptan
OtherG27552CA · Medical License
Medicare PINW22342CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Michael Denis Masterson M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91361 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$185.36 typical visit price
range $62.32 – $185.36
Typical copayment $46.34 (range $15.58 – $46.34)
Most-billed visit code 99205
Established Patient
$108.74 typical visit price
range $20.68 – $151.85
Typical copayment $27.18 (range $5.17 – $37.96)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Masterson's NPI number?

The NPI number for Michael Masterson is 1649240052. It was assigned to this individual provider in the NPPES registry on January 26, 2006. The provider is also known as Michael Denis Masterson M.D..

Where is Michael Masterson located?

Michael Masterson practices at 1250 La Venta Suite 202, Westlake Village, CA 91361. The listed phone number is (805) 496-5153.

What is Michael Masterson's specialty?

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

Is Michael Masterson enrolled in Medicare?

Yes. Michael Masterson is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Michael Masterson was last updated on February 3, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.