James Mason, M.D.
NPI 1497717730 · Hematology & Oncology Physician · La Jolla, CA
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Mason, M.D. is a Hematology & Oncology Physician provider in La Jolla, CA (NPI 1497717730).
Provider details
- NPI number
- 1497717730
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G56827 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,448 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 701 | $136 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 436 | $17 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 333 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 292 | $97 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 283 | $71 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Acyclovir | 107 | 31 |
| Hydroxyurea | 71 | 17 |
| Dexamethasone | 59 | 18 |
| Ibrutinibbrand: Imbruvica | 50 | — |
| Gabapentin | 36 | — |
| Lenalidomide | 26 | — |
| Prednisone | 25 | — |
| Apixaban |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$907 across 27 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-03
- Last updated
- 2019-12-03
Frequently asked questions
- What is James Mason's NPI number?
- James Mason's National Provider Identifier (NPI) is 1497717730, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Mason's specialty?
- James Mason is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is James Mason located?
- James Mason's practice location on file with NPPES is 10710 N Torrey Pines Rd, La Jolla, CA 92037-1035.
- What is James Mason's phone number?
- The practice phone number listed in the NPPES registry for James Mason is (858) 554-8597.
- Does James Mason accept Medicare?
- James Mason is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Mason's NPI active?
- Yes — James Mason's NPI (1497717730) is active in the NPPES registry as of the last update on 2019-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.