Ron Samuel Newfield, M.D.
Pediatric Endocrinology Physician · San Diego, CA
Ron Samuel Newfield, M.D. is a pediatric endocrinology physician with a practice address in San Diego, California, and NPI 1679644421, issued on Nov 13, 2006. Check the license (California A73875, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ron Samuel Newfield
- Credential
- M.D.
- Primary taxonomy
- Pediatric Endocrinology Physician 2080P0205X
- License number
- A73875 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8110 Birmingham Way, San Diego, CA 92123
- Phone
- (858) 966-4032
- Enumerated
- Nov 13, 2006
- Record last updated
- Aug 25, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- 00A738750 CA
- Entity
- Type 1 · individual
8 nearest pediatric endocrinology physician records → All 207 in California → Look up another NPI →
Also registered at 8110 Birmingham Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mercedes Amado, M.D.Allergy & Immunology Physician1477510287
- Angela Barney, MDPediatric Adolescent Medicine Physician1477948115
- John Bastian, M.D.Allergy & Immunology Physician1316018179
- Rakesh Bhattacharjee, M.D.Pediatric Pulmonology Physician1588781173
Verify Ron Samuel Newfield in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A73875Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% fewer Medicare Part D claims than the average pediatric endocrinology physician in 2024
43 Medicare Part D claims, against an average of 105 among the 386 providers of this specialty who prescribed in Part D.
Most prescribed
- Colesevelam Hcl14 claims
- Ezetimibe12 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: $1,905.50
22 payments; by number, the most common kind was food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 931 providers of this specialty with any payment received $4,382.94 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Ron Samuel Newfield among 207 pediatric endocrinology physician records in California
Ron Samuel Newfield, M.D. is one of 207 pediatric endocrinology physician records with a practice address in California. 63% 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, 61% newer
- In a Medicare fileYes · 63% of these records are
- In the CMS Doctors and Clinicians fileNo · 23% of these records are
- Record last updated2011 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0205X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Endocrinology Physician providers in California
There are 207 pediatric endocrinology physician records in California.
All 207 in California → Every provider in San Diego → Pediatric Endocrinology Physician nationwide →
The 8 pediatric endocrinology physician records with the nearest ZIP codes
- Deema Arafah, MDSan Diego, CA 921231235423856
- Sherry Franklin, M.D.San Diego, CA 921231376659995
- Michael Gottschalk, M.D., PH.D.San Diego, CA 921231033280888
- Alberto Hayek, M.D.San Diego, CA 921231942371794
- Kenneth Jones, M.D.San Diego, CA 921231851462600
- Jane Kim, M.D.San Diego, CA 921231235200098
- Karen Klein, M.D.San Diego, CA 921231760553515
- Ximena Lopez, MDSan Diego, CA 921231740316405
Common questions
What is Ron Samuel Newfield, M.D.'s NPI number?
Ron Samuel Newfield, M.D.'s National Provider Identifier (NPI) is 1679644421, issued on Nov 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ron Samuel Newfield, M.D. located?
The NPPES record lists a practice address at 8110 Birmingham Way, San Diego, CA, 92123. Phone: (858) 966-4032. Providers update this record themselves, so call before visiting.
How can I verify Ron Samuel Newfield, M.D.'s license?
NPPES lists California license number A73875, 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 Ron Samuel Newfield, M.D. prescribe under Medicare Part D?
In 2024, Ron Samuel Newfield, M.D. had 43 Medicare Part D claims; the average among pediatric endocrinology physician prescribers was 105. 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.
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.