Robert Borrowdale, M.D.
Obstetrics & Gynecology Physician · Tustin, CA
Robert Borrowdale, M.D. is an obstetrics & gynecology physician with a practice address in Tustin, California, and NPI 1013958545, issued on Jun 8, 2006. Check the license (California G56910, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Borrowdale
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G56910 CA
Self-reported in NPPES; status is on the state search - Practice location
- 661 W 1St St Ste G, Tustin, CA 92780
- Phone
- (714) 665-9890
- Enumerated
- Jun 8, 2006
- Entity
- Type 1 · individual
Also registered at 661 W 1St St Ste G
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marlie Abrahams, PA-CPhysician Assistant1639409048
- Denise Aquino, PA-CPhysician Assistant1750988671
- Bernard Bennett, MDInternal Medicine Physician1871568899
- Viktoriya Birger, NP-CFamily Nurse Practitioner1720853153
- Heather Bonnville, PHYSICIAN ASSISTANTPhysician Assistant1770762429
- Georgina Calderon, RN, DNPGerontology Nurse Practitioner1700437522
Verify Robert Borrowdale in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G56910Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
72% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
52 Medicare Part D claims for 11 beneficiaries, against an average of 188 among the 27,363 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Estradiol23 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: $16.74
1 payment, mostly food and beverage; the largest payer was Aspira Women's Health Inc. The 20,757 providers of this specialty with any payment received $1,147.37 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.
One hospital or facility affiliation
- Caduceus Physicians Medical GroupYorba Linda, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Obstetrics & Gynecology Physician providers in California
There are 5,004 obstetrics & gynecology physician records in California.
Other obstetrics & gynecology physician records in California
- Ingrid Aalami, MDSan Jose, CA1952376550
- Avisa Abaian- Eagar, M.D.Orange, CA1316057755
- Derek Abbassi, MDWalnut Creek, CA1841364155
- Nicole Abell, DOVentura, CA1811243603
- Zachary AbelsonLos Angeles, CA1689237414
- Sina Abhari, MDNewport Beach, CA1073955290
- Ray Abinader, M.D.Loma Linda, CA1770901548
- Tarek Abou El Kheir, M.D.San Bernardino, CA1477521789
- Nada Abou-HaibaLos Angeles, CA1134067549
- Ariel Abrahams, MDDowney, CA1376726174
Common questions
What is Robert Borrowdale, M.D.'s NPI number?
Robert Borrowdale, M.D.'s National Provider Identifier (NPI) is 1013958545, issued on Jun 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Borrowdale, M.D. located?
The NPPES record lists a practice address at 661 W 1St St Ste G, Tustin, CA, 92780. Phone: (714) 665-9890. Providers update this record themselves, so call before visiting.
How can I verify Robert Borrowdale, M.D.'s license?
NPPES lists California license number G56910, 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 Robert Borrowdale, M.D. prescribe under Medicare Part D?
In 2024, Robert Borrowdale, M.D. had 52 Medicare Part D claims for 11 beneficiaries; the average among obstetrics & gynecology physician prescribers was 188. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.