Robert S. Lee, MD
Internal Medicine Physician · Oceanside, CA
Robert S. Lee, MD is an internal medicine physician with a practice address in Oceanside, California, and NPI 1528081155, issued on Jul 25, 2006. Check the license (California A89811, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert S. Lee
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A89811 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4002 Vista Way, Oceanside, CA 92056
- Phone
- (760) 439-6581
- Enumerated
- Jul 25, 2006
- Record last updated
- Dec 7, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (760) 439-6585
- Medicare enrollment
- Enrolled (PECOS I20070224000153); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 2003
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 4002 Vista Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- David Antoun, MDInternal Medicine Physician1043573785
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- Allison Auchter, MD, PHDEmergency Medical Services (Emergency Medicine) Physician1013595248
- Romana Bailey, M.D.Neonatal-Perinatal Medicine Physician1396023685
Verify Robert S. Lee in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A89811Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
217 Medicare Part D claims for 110 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Prednisone14 claims
- Furosemide13 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.
Bills Medicare through one group practice
- Hospitalist Medicine Physicians OF California IncOceanside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert S. Lee among 17,696 internal medicine physician records in California
Robert S. Lee, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2003 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Oceanside → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Antoun, MDOceanside, CA 920561043573785
- Nancy Chang, M.D.Oceanside, CA 920561386635621
- Paul Dang, MDOceanside, CA 920561801882592
- Richard Day, MDOceanside, CA 920561386716959
- Kaveh Farhoomand, DOOceanside, CA 920561447249040
- Catherine Lawson, M.D.Oceanside, CA 920561649279043
- Matthew Long, DO, MPHOceanside, CA 920561740863273
- Claire McCutcheon, MDOceanside, CA 920561689028060
Common questions
What is Robert S. Lee, MD's NPI number?
Robert S. Lee, MD's National Provider Identifier (NPI) is 1528081155, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert S. Lee, MD located?
The NPPES record lists a practice address at 4002 Vista Way, Oceanside, CA, 92056. Phone: (760) 439-6581. Providers update this record themselves, so call before visiting.
How can I verify Robert S. Lee, MD's license?
NPPES lists California license number A89811, 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 S. Lee, MD prescribe under Medicare Part D?
In 2024, Robert S. Lee, MD had 217 Medicare Part D claims for 110 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.