Robert Ward Hagar, M.D.
Internal Medicine Physician · Oakland, CA
Robert Ward Hagar, M.D. is an internal medicine physician with a practice address in Oakland, California, and NPI 1760549182, issued on Jan 3, 2007. Check the license (California G53126, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Ward Hagar
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G53126 CA
Self-reported in NPPES; status is on the state search - Practice location
- 747 52ND St, Oakland, CA 94609
- Phone
- (510) 428-3885
- Enumerated
- Jan 3, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00G531260 CA
- Medicare enrollment
- Enrolled (PECOS I20040315000752); accepts Medicare assignment
- Medical or professional school
- University Of Virginia School Of Medicine, 1983
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 747 52ND St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Monica AguilarStudent in an Organized Health Care Education/Training Program1770276990
Verify Robert Ward Hagar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G53126Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
191 Medicare Part D claims for 24 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 82 claims were for opioids.
Most prescribed
- Hydroxyurea26 claims
- Hydrocodone-Acetaminophen23 claims
- Hydromorphone Hcl20 claims
- Oxycodone-Acetaminophen15 claims
- Promethazine Hcl12 claims
- Methadone Hcl11 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
- Ucsf Medical Group Business ServicesSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Ward Hagar among 17,696 internal medicine physician records in California
Robert Ward Hagar, M.D. 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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1983 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 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).
432 internal medicine physician records list a practice address in Oakland
They are 432 of the 18,558 NPPES records with a practice address in Oakland, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Oakland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rachel Callaghan, M.D.Oakland, CA 946091548239627
- Samuel Dong, MDOakland, CA 946091528027471
- Amy Garlin, M.D.Oakland, CA 946091346269719
- Marci Gottlieb, MDOakland, CA 946091194785428
- Christopher Hall, M.D.Oakland, CA 946091295754729
- John Jones, MDOakland, CA 946091639139967
- Michael Kim, MDOakland, CA 946091477513703
- Pandora Lee, M.D.Oakland, CA 946091598725327
Common questions
What is Robert Ward Hagar, M.D.'s NPI number?
Robert Ward Hagar, M.D.'s National Provider Identifier (NPI) is 1760549182, issued on Jan 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Robert Ward Hagar, M.D. located?
The NPPES record lists a practice address at 747 52ND St, Oakland, CA, 94609. Phone: (510) 428-3885. Providers update this record themselves, so call before visiting.
How can I verify Robert Ward Hagar, M.D.'s license?
NPPES lists California license number G53126, 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 Ward Hagar, M.D. prescribe under Medicare Part D?
In 2024, Robert Ward Hagar, M.D. had 191 Medicare Part D claims for 24 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Robert Ward Hagar, M.D.'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.