Douglas Starr, MD
Family Medicine Physician · Diamond Bar, CA
Douglas Starr, MD is a family medicine physician with a practice address in Diamond Bar, California, and NPI 1154322998, issued on Aug 2, 2005. Check the license (California G41594, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Douglas Starr
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G41594 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1514 Valley Vista Dr, Diamond Bar, CA 91765
- Phone
- (909) 860-1144
- Enumerated
- Aug 2, 2005
- Record last updated
- Nov 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (909) 860-8307
- Medicare enrollment
- Enrolled (PECOS I20040601001571); accepts Medicare assignment
- Medical or professional school
- Un Of California, Irvine, College Of Medicine, 1978
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1514 Valley Vista Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Wilfredo Alejo, M.D.Pediatrics Physician1114990785
- Silvia Alonzo, MS, PA-CMedical Physician Assistant1942586623
- Jing Chen, M.D.Pediatrics Physician1699208942
- William FenertyFamily Medicine Physician1184625915
- Brian Koffman, MDFamily Medicine Physician1326049164
- Keli Layton-Cunnigan, PAPhysician Assistant1063613958
Verify Douglas Starr in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G41594Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average family medicine physician in 2024
9,074 Medicare Part D claims for 683 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 220 claims were for opioids.
Most prescribed
- Atorvastatin Calcium549 claims
- Amlodipine Besylate357 claims
- Metformin Hcl299 claims
- Pantoprazole Sodium286 claims
- Levothyroxine Sodium284 claims
- Lisinopril270 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: $169.00
8 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. The 55,478 providers of this specialty with any payment received $902.55 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.
Bills Medicare through one group practice
- Providence Medical FoundationFullerton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Douglas Starr among 17,133 family medicine physician records in California
Douglas Starr, MD is one of 17,133 family medicine 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1978 · median 2005 among the 10,652 with a school on file
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
25 family medicine physician records list a practice address in Diamond Bar
They are 25 of the 598 NPPES records with a practice address in Diamond Bar, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Diamond Bar → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- William FenertyDiamond Bar, CA 917651184625915
- John Fonmin, MDDiamond Bar, CA 917651629147319
- David Hsieh, M.D.Diamond Bar, CA 917651891919874
- Lubna Isho, DODiamond Bar, CA 917651851350797
- Brian Koffman, MDDiamond Bar, CA 917651326049164
- Yann Ping Pan, MDDiamond Bar, CA 917651114250925
- David Rhodes, MDDiamond Bar, CA 917651518968353
- Yvonne Rodriguez Lawson, MDDiamond Bar, CA 917651912967233
Common questions
What is Douglas Starr, MD's NPI number?
Douglas Starr, MD's National Provider Identifier (NPI) is 1154322998, issued on Aug 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Douglas Starr, MD located?
The NPPES record lists a practice address at 1514 Valley Vista Dr, Diamond Bar, CA, 91765. Phone: (909) 860-1144. Providers update this record themselves, so call before visiting.
How can I verify Douglas Starr, MD's license?
NPPES lists California license number G41594, 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 Douglas Starr, MD prescribe under Medicare Part D?
In 2024, Douglas Starr, MD had 9,074 Medicare Part D claims for 683 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.