Gregory David Middleton, MD
Rheumatology Physician · La Jolla, CA
Gregory David Middleton, MD is a rheumatology physician with a practice address in La Jolla, California, and NPI 1104891290, issued on Feb 22, 2006. Check the license (California C54037, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory David Middleton
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License numbers
- C54037 CA
9639 NV
Self-reported in NPPES; status is on the state search - Practice location
- 9350 Campus Point Dr, La Jolla, CA 92037
- Phone
- (858) 657-8200
- Enumerated
- Feb 22, 2006
- Record last updated
- Mar 28, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (858) 657-8235
- Medicaid ID
- 2018674 NV
- Medicare enrollment
- Enrolled (PECOS I20100520000900); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 9350 Campus Point Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Laurel Branch, MDGastroenterology Physician1912437617
- Catherine Burgess, PT, DPT, OCSSpecialist1205287687
- Michelle Cacho, PTPhysical Therapist1043802465
- John Carethers, M.D.Gastroenterology Physician1518048990
Verify Gregory David Middleton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C54037Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average rheumatology physician in 2024
988 Medicare Part D claims for 138 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 27 claims were for opioids.
Most prescribed
- Methotrexate177 claims
- Prednisone172 claims
- Allopurinol105 claims
- Hydroxychloroquine Sulfate68 claims
- Leflunomide58 claims
- Colchicine47 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Regents OF The University OF CaliforniaSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory David Middleton among 926 rheumatology physician records in California
Gregory David Middleton, MD is one of 926 rheumatology physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1989 · median 2003 among the 641 with a school on file
- Record last updated2010 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in La Jolla → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Arnoldas Ceponis, MDLa Jolla, CA 920371144423039
- Arthur Kavanaugh, M.D.La Jolla, CA 920371679584486
- Richard Keating, MDLa Jolla, CA 920371215099767
- Susan Lee, M.D.La Jolla, CA 920371386677045
- Christina Payne, M.D.La Jolla, CA 920371679912661
- Ken Pischel, M.D., PH.D.La Jolla, CA 920371124082847
- Priya Reddy, MDLa Jolla, CA 920371356965552
- Stacey Schulman, M.D.La Jolla, CA 920371861458911
Common questions
What is Gregory David Middleton, MD's NPI number?
Gregory David Middleton, MD's National Provider Identifier (NPI) is 1104891290, issued on Feb 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory David Middleton, MD located?
The NPPES record lists a practice address at 9350 Campus Point Dr, La Jolla, CA, 92037. Phone: (858) 657-8200. Providers update this record themselves, so call before visiting.
How can I verify Gregory David Middleton, MD's license?
NPPES lists California license number C54037, 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 Gregory David Middleton, MD prescribe under Medicare Part D?
In 2024, Gregory David Middleton, MD had 988 Medicare Part D claims for 138 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Gregory David Middleton, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.
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.