Harold William Jackson, DO
Family Medicine Physician · Riverside, CA
Harold William Jackson, DO is a family medicine physician with a practice address in Riverside, California, and NPI 1235126475, issued on Oct 3, 2005. Check the license (California 20A3741, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Harold William Jackson
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A3741 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4646 Brockton Ave, Riverside, CA 92506
- Phone
- (951) 774-2942
- Enumerated
- Oct 3, 2005
- Record last updated
- Oct 23, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (951) 774-2945
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 4646 Brockton Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Suman Agarwal, MDFamily Medicine Physician1861489098
- Maria Ascencio, FNP-CFamily Nurse Practitioner1497299549
- Mary Barba, NPFamily Nurse Practitioner1447659370
- Victoria Begley, N.P.Nurse Practitioner1760417034
- John Branch, DOFamily Medicine Physician1174510309
- Julie Buchanan, PA-CMedical Physician Assistant1710298005
Verify Harold William Jackson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A3741Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average family medicine physician in 2024
409 Medicare Part D claims for 142 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium30 claims
- Rosuvastatin Calcium20 claims
- Levothyroxine Sodium18 claims
- Alendronate Sodium14 claims
- Lisinopril13 claims
- Tamsulosin Hcl13 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 William Jackson among 17,133 family medicine physician records in California
Harold William Jackson, DO 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 fileNo · 62% of these records are
- Record last updated2017 · 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).
258 family medicine physician records list a practice address in Riverside
They are 258 of the 13,893 NPPES records with a practice address in Riverside, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Riverside → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Suman Agarwal, MDRiverside, CA 925061861489098
- John Branch, DORiverside, CA 925061174510309
- Nardo Buena, M.D.Riverside, CA 925061689673626
- Keith Curtis, DORiverside, CA 925061912994146
- Thomas Davis, MDRiverside, CA 925061376530501
- Troy Handojo, M.D.Riverside, CA 925061073506655
- Andrij Horodysky, MDRiverside, CA 925061851372239
- Janine Hwang, MDRiverside, CA 925061346221710
Common questions
What is Harold William Jackson, DO's NPI number?
Harold William Jackson, DO's National Provider Identifier (NPI) is 1235126475, issued on Oct 3, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Harold William Jackson, DO located?
The NPPES record lists a practice address at 4646 Brockton Ave, Riverside, CA, 92506. Phone: (951) 774-2942. Providers update this record themselves, so call before visiting.
How can I verify Harold William Jackson, DO's license?
NPPES lists California license number 20A3741, 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 William Jackson, DO prescribe under Medicare Part D?
In 2024, Harold William Jackson, DO had 409 Medicare Part D claims for 142 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.