James R. Mason, M.D.
James R. Mason is a Hematology & Oncology specialist based in La Jolla, CA with over 42 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Also practices: HEMATOLOGY/ONCOLOGY, INTERNAL MEDICINE
James R. Mason, M.D. practices as part of a group hematology & oncology specialist practice in La Jolla, CA. He graduated from University of California, San Francisco School of Medicine in 1984 and has 42+ years of clinical experience. Among his Medicare patients, common conditions include high cholesterol, hypertension, and arthritis (per CMS data).
Older · 2365dNPPES updated 2019-12-03 · verify NPI on CMS · Verify license at Medical Board of California
How Does This Doctor Compare?
Generic Rx
↑ Higher = better72.5%
California avg: 83.3 · US avg: 82.8
⚠ Lower than most doctors nationally(-10.3 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
608
Unique beneficiaries
High volumePrescription Recipients
110
Patients prescribed
Prescriptions Written
716
Total claims
Total Medicare drug cost: $3.52M
Percentile rankings compared against 9,360 reporting peers in California.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages High Cholesterol, Hypertension, and Arthritis.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+1%) — a focus area for this doctor
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-2%) — less common here
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-3%) — less common here
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-2%) — less common here
Weakened bones that are more prone to fractures, common in older adults
US avg: 18.1%↑ More patients than average (+10%) — a focus area for this doctor
Diseases involving abnormal cell growth with potential to spread to other body parts
US avg: 20.8%↑ More patients than average (+4%) — a focus area for this doctor
Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-9%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$907 received from industry
27 transactions reported in 2024 ·Moderate tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to James R. Mason's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1984
University of California, San Francisco School of Medicine
42 years in practice
Senior practitioner
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Taxonomy: 207RH0003X
Education & Training
University of California, San Francisco School of Medicine (Class of 1984)
Mailing address
10790 Rancho Bernardo Rd, San Diego, CA 92127-5705
Differs from practice location
Primary hospital affiliation: Acute Care Hospitals
CMS Certification Number: 190088
View hospital on Medicare Care CompareVirtual Hematology & Oncology Care With James R. Mason
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with James R. Mason for cholesterol management, blood pressure monitoring, arthritis follow-ups — no travel to La Jolla required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about James R. Mason
NPI records show Dr. Mason as active with telehealth listed in La Jolla, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (858) 554-8597.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact James R. Mason
Practice Location
10710 N Torrey Pines Rd, La Jolla, CA 92037-1035
Mailing Address
10790 Rancho Bernardo Rd, San Diego, CA 92127-5705
This is a provider directory. Contact the office directly to schedule appointments.
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