James Mccallum, M.D.
NPI 1609838994 · Endocrinology, Diabetes & Metabolism Physician · La Jolla, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Mccallum, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in La Jolla, CA (NPI 1609838994).
Provider details
- NPI number
- 1609838994
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A55708 (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
2,961 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 | 946 | $137 |
| 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 | 862 | $17 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 463 | $16 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 317 | $35 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 118 | $177 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 77 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 432 | 126 |
| Semaglutidebrand: Ozempic | 286 | 65 |
| Metformin Hclbrand: Metformin Hcl Er | 265 | 80 |
| Metformin Hcl | 202 | 67 |
| Atorvastatin Calcium | 201 | 58 |
| Levothyroxine Sodiumbrand: Synthroid | 201 | 53 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$913 across 22 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
- 2006-04-04
- Last updated
- 2020-03-09
- Certified
- 2020-03-09
Frequently asked questions
- What is James Mccallum's NPI number?
- James Mccallum's National Provider Identifier (NPI) is 1609838994, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Mccallum's specialty?
- James Mccallum is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is James Mccallum located?
- James Mccallum's practice location on file with NPPES is 9898 Genesee Ave, La Jolla, CA 92037-1205.
- What is James Mccallum's phone number?
- The practice phone number listed in the NPPES registry for James Mccallum is (858) 824-5335.
- Does James Mccallum accept Medicare?
- James Mccallum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Mccallum's NPI active?
- Yes — James Mccallum's NPI (1609838994) is active in the NPPES registry as of the last update on 2020-03-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.