1. Home
  2. Directory
  3. California
  4. Wildomar
  5. Radiology
  6. NPI Profile

JAMES MICHAEL MASON MD
NPI 1902955818
Radiology - Radiation Oncology in Wildomar, CA

Active since January 09, 2007PECOS EnrolledAccepts Medicare Assignment
99.12/100
CMS Quality Rating
36450 INLAND VALLEY DR, WILDOMAR, CA 92595(951) 696-0679(951) 696-9748 Get Directions Write a Review

NPPES record last updated: November 13, 2020. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Nov 13, 2020, Apr 10, 2018 (2 updates tracked since 2018).

About James Michael Mason Md NPPES

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

JAMES MICHAEL MASON MD (NPI 1902955818) is an individual radiation oncology provider in Wildomar, California, licensed in California (G85713) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, maintains a secondary practice location in Riverside, and is a graduate of Wayne State University School Of Medicine (1988).

NPPES Registry Identity

NPI1902955818
Entity TypeIndividualMale
Primary Taxonomy2085R0001X
Provider Legal NameJAMES MICHAEL MASONCredential: MD
Location Address36450 INLAND VALLEY DRWildomar, CA 92595-9583
Mailing AddressPo Box 512185Los Angeles, CA 90051-0185
Phone(951) 696-0679
Fax(951) 696-9748
Sole ProprietorNo
Medical School CMSWayne State University School Of MedicineGraduated 1988
Enumeration DateJanuary 9, 2007
Last NPPES UpdateNovember 13, 20202 updates tracked since enumeration
NPPES CertifiedNovember 13, 2020
✔ NPI 1902955818 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0001X
License✔ Licensed in CA · G85713
Definition

A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.

36450 INLAND VALLEY DR, Wildomar, CA 92595
Open in Google Maps ↗

Secondary Practice Location 1

Location 16939 Palm CtRiverside, CA 92506-2815 · Phone (951) 683-6771 · Fax (951) 683-7450

Other Identifiers 1

Medicaid0961188OH

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

James Michael Mason Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8921009960
PECOS Enrollment IDI20070810000801
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.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Ct guidance for insertion of radiation therapy fields 77014
CT guidance for insertion of radiation therapy fields involves using a CT scan to accurately map the area of your body where radiation will be applied. This ensures the radiation targets only the necessary area, minimizing impact to healthy tissues.
271 services21 patients
Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session G6015
Intensity-modulated radiation therapy (IMRT) is a type of cancer treatment. It uses advanced technology to manipulate photon beams of radiation to conform to the shape of a tumor. IMRT allows for the radiation dose to conform more precisely to the three-dimensional shape of the tumor by modulating—or controlling—the intensity of the radiation beam. This can result in better tumor control and less harm to healthy tissue.
203 services13 patients
Continuing radiation therapy consultation per week 77336
Continuing radiation therapy consultation per week involves regular meetings with your healthcare team. These sessions help monitor your progress, manage side effects, and adjust your treatment plan if necessary. It's a key part of ensuring the effectiveness of your radiation therapy.
54 services14 patients
Radiation treatment management, 5 treatment sessions 77427
Radiation treatment management involves a series of 5 sessions where targeted radiation is used to destroy or shrink cancer cells in your body. Each session is carefully planned to maximize effectiveness while minimizing harm to healthy tissues. You may experience side effects which will be closely monitored and managed for your comfort.
52 services16 patients
Calculation of radiation therapy dose 77300
Radiation therapy dose calculation is a process to determine the exact amount of radiation needed to treat a specific area in the body. This calculation helps ensure the treatment is effective while minimizing harm to healthy tissues. It's a key part of planning your radiation therapy.
41 services15 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
35 services31 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92595 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
$179.42 typical visit price
range $59.60 – $179.42
Typical copayment $44.85 (range $14.90 – $44.85)
Most-billed visit code 99205
Established Patient
$74.08 typical visit price
range $19.37 – $146.42
Typical copayment $18.52 (range $4.84 – $36.60)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

99.12/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality85.23
Promoting Interoperability100
Improvement Activities40

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.

HEMATOLOGY/ONCOLOGY CONSULTANTS
Durable Medical Equipment & Medical Supplies
36450 INLAND VALLEY DR, SUITE 101
WILDOMAR, CA 92595
Riverside County (951) 696-0498
DR. ANH NGOC BREWER D.O.
Family Medicine
36450 INLAND VALLEY DR
WILDOMAR, CA 92595
Riverside County (951) 600-3465
BRUCE A. HAYTON, M.D., INC.
Specialist
36450 INLAND VALLEY DR, SUITE 101
WILDOMAR, CA 92595
Riverside County (951) 698-7514
MR. MILTON RAFAEL RAMIREZ M.D.
Family Medicine
36450 INLAND VALLEY DR
WILDOMAR, CA 92595
Riverside County (866) 984-7483
YALDA LYNN HOWARD PHARMD
Pharmacist
36450 INLAND VALLEY DR
WILDOMAR, CA 92595
Riverside County (951) 600-3322
DR. JEE-HYON PARK M.D.
Internal Medicine
36450 INLAND VALLEY DR
WILDOMAR, CA 92595
Riverside County (866) 206-2983
DANTE GIBSON PHARM.D.
Pharmacist
36450 INLAND VALLEY DR, SUITE #209
WILDOMAR, CA 92595
Riverside County (866) 370-1940
DAVID CHEN
Pharmacist
36450 INLAND VALLEY DR
WILDOMAR, CA 92595
Riverside County (951) 600-3322

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 James Mason's NPI number?

The NPI number for James Mason is 1902955818. It was assigned to this individual provider in the NPPES registry on January 9, 2007.

Where is James Mason located?

James Mason practices at 36450 Inland Valley Dr, Wildomar, CA 92595. The listed phone number is (951) 696-0679.

What is James Mason's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Is James Mason enrolled in Medicare?

Yes. James Mason is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for James Mason was last updated on November 13, 2020. NPI Profile syncs with the weekly NPPES data releases published by CMS.