Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Gregory David Middleton, MD

Individual provider Rheumatology Physician · NPI 1104891290

Gregory David Middleton, MD practises Rheumatology in LA Jolla, California. Graduated from Boston University School of Medicine in 1989, 37 years ago. Practices with Regents of the University of California, a 2,061-clinician group and accepts Medicare assignment. Licensed in California and Nevada.

Years since qualifying
37
Trained at
Boston University School of Medicine
Licensed in
CA, NV
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

9350 Campus Point Dr
LA Jolla, CA 92037-1300 Not confirmed with CMS for 16 years — call before visiting
Phone: (858) 657-8200
Fax: (858) 657-8235
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Rheumatology Physician (primary) Taxonomy 207RR0500X · Licence C54037 (CA)
Rheumatology Physician Taxonomy 207RR0500X · Licence 9639 (NV)

Record details

NPI number1104891290
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 22, 2006
Last updated in NPPESMarch 28, 2010

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRHEUMATOLOGY
Also practisesORTHOPEDIC SURGERY
Medical schoolBOSTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Regents Of The University Of California — 2061 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,005
Services billed 2,567 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Regents of the University of California

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2061 clinicians in the practice; 12 are shown here.

Other providers in LA Jolla