NPPES file of Aug 9, 2026

James D. McCallum, M.D.

Endocrinology, Diabetes & Metabolism Physician · La Jolla, CA

James D. McCallum, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in La Jolla, California, and NPI 1609838994, issued on Apr 4, 2006. Check the license (California A55708, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1609838994
Name
James D. McCallum
Credential
M.D.
Primary taxonomy
Endocrinology, Diabetes & Metabolism Physician 207RE0101X
License number
A55708 CA
Self-reported in NPPES; status is on the state search
Practice location
9898 Genesee Ave, La Jolla, CA 92037
Phone
(858) 824-5335
Enumerated
Apr 4, 2006
Record last updated
Mar 9, 2020 (not updated in 6 years: call before relying on the address or phone)
Fax
(858) 964-3131
Medicaid ID
00A557080 CA
Medicare enrollment
Enrolled (PECOS I20080618000757); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →

Also registered at 9898 Genesee Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Omar Al-Nouri, D.O.Vascular Surgery Physician1770742264
  2. Bella Albakova, PASurgical Physician Assistant1013020809
  3. Rawaa Almukhtar, M.D., MPHDermatology Physician1003202409
  4. Eneh-Lieh Ancheta, NPNurse Practitioner1477067981
  5. Bruce Armstrong, P.A.-C. , MHSPhysician Assistant1003915042
  6. Anshuman Bansal, M.D.Vascular & Interventional Radiology Physician1366685273

Verify James D. McCallum in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A55708    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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83% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024

4,819 Medicare Part D claims for 603 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of claims.

  1. James McCallum4,819
  2. Specialty average2,630

Most prescribed

  1. Levothyroxine Sodium432 claims
  2. Ozempic286 claims
  3. Metformin Hcl Er265 claims
  4. Metformin Hcl202 claims
  5. Atorvastatin Calcium201 claims
  6. Synthroid201 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $913.33

22 payments; by number, the most common kind was food and beverage; the largest payer was Eli Lilly and Company. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. James McCallum$913.33
  2. Specialty average$5,742.15

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Scripps HealthLa Jolla, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

James D. McCallum among 1,131 endocrinology, diabetes & metabolism physician records in California

James D. McCallum, M.D. is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.

  • NPI issued2006 · 5% of these records are older, 54% newer
  • In a Medicare fileYes · 84% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated1990 · median 2003 among the 779 with a school on file
  • Record last updated2020 · 57% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Endocrinology, Diabetes & Metabolism Physician providers in California

There are 1,131 endocrinology, diabetes & metabolism physician records in California.

All 1,131 in California → Every provider in La Jolla → Endocrinology, Diabetes & Metabolism Physician nationwide →

The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes

  1. Amy Chang, MDLa Jolla, CA 920371750568911
  2. George Dailey, M.D.La Jolla, CA 920371841266343
  3. Daniel Einhorn, M.D.La Jolla, CA 920371275525776
  4. Howard Foyt, M.D.La Jolla, CA 920371366625055
  5. Heather Hofflich, DOLa Jolla, CA 920371598962102
  6. Farahnaz Joarder, M.D.La Jolla, CA 920371205063815
  7. Matthew Levine, M.DLa Jolla, CA 920371801994231
  8. Christopher Marx, M.D.La Jolla, CA 920371811958929

Common questions

What is James D. McCallum, M.D.'s NPI number?

James D. McCallum, M.D.'s National Provider Identifier (NPI) is 1609838994, issued on Apr 4, 2006. An NPI identifies a provider in billing; it is not a license.

Where is James D. McCallum, M.D. located?

The NPPES record lists a practice address at 9898 Genesee Ave, La Jolla, CA, 92037. Phone: (858) 824-5335. Providers update this record themselves, so call before visiting.

How can I verify James D. McCallum, M.D.'s license?

NPPES lists California license number A55708, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does James D. McCallum, M.D. prescribe under Medicare Part D?

In 2024, James D. McCallum, M.D. had 4,819 Medicare Part D claims for 603 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.