Harold Orr, MD
Internal Medicine Physician · Oakland, CA
Harold Orr, MD is an internal medicine physician with a practice address in Oakland, California, and NPI 1861822819, issued on Nov 12, 2013. Check the license (California C37120, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Harold Orr
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C37120 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11100 Kerrigan Dr, Oakland, CA 94605
- Phone
- (510) 453-6392
- Enumerated
- Nov 12, 2013
- Record last updated
- Nov 12, 2013 (not updated in 13 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Harold Orr in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C37120Check 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 33 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Levothyroxine Sodium45 claims
- Pyridostigmine Bromide15 claims
- Latanoprost14 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.
Harold Orr among 17,696 internal medicine physician records in California
Harold Orr, 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 2013, is newer than 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2013 · 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
- Farrell Barnett, M.D.Oakland, CA 946051639391170
- John Christensen, M.D.Oakland, CA 946051689646556
- Melissa EelkemaOakland, CA 946051992168058
- Marilyn McCartney, M.D.Oakland, CA 946051649490046
- Laura Miller, M.D.Oakland, CA 946051487608774
- Glenda NewellOakland, CA 946051912058496
- Uchenna Okoronkwo, MDOakland, CA 946051922025972
- Beth Schweitzer, M.D.Oakland, CA 946051588618813
Common questions
What is Harold Orr, MD's NPI number?
Harold Orr, MD's National Provider Identifier (NPI) is 1861822819, issued on Nov 12, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Harold Orr, MD located?
The NPPES record lists a practice address at 11100 Kerrigan Dr, Oakland, CA, 94605. Phone: (510) 453-6392. Providers update this record themselves, so call before visiting.
How can I verify Harold Orr, MD's license?
NPPES lists California license number C37120, 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 Harold Orr, MD prescribe under Medicare Part D?
In 2024, Harold Orr, MD had 191 Medicare Part D claims for 33 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.