NPPES file of Aug 9, 2026

Derek A. Dwinell, PHARM. D.

Pharmacist · Walnut Creek, CA

Derek A. Dwinell, PHARM. D. is a pharmacist with a practice address in Walnut Creek, California, and NPI 1629146378, issued on Dec 1, 2006. Check the license (California 52953, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1629146378
Name
Derek A. Dwinell
Credential
PHARM. D.
Primary taxonomy
Pharmacist 183500000X
License number
52953 CA
Self-reported in NPPES; status is on the state search
Practice location
1425 S Main St, Walnut Creek, CA 94596
Phone
(925) 295-4463
Enumerated
Dec 1, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest pharmacist records → All 32,533 in California → Look up another NPI →

Also registered at 1425 S Main St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Eric AaserudeEmergency Medicine Physician1811491194
  2. Derek Abbassi, MDObstetrics & Gynecology Physician1841364155
  3. Peter Ackerman, MDEmergency Medicine Physician1427435023
  4. Aaron Mark Acosta, DOEmergency Medicine Physician1538789987
  5. Basil Adad, MDOtolaryngology Physician1487732574
  6. Derek Ailes, M.D.Emergency Medical Services (Emergency Medicine) Physician1992001804

Verify Derek A. Dwinell in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 52953    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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Derek A. Dwinell among 32,533 pharmacist records in California

Derek A. Dwinell, PHARM. D. is one of 32,533 pharmacist records with a practice address in California. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than under 1% of them.

  • NPI issued2006 · under 1% of these records are older, 94% newer
  • In a Medicare fileNo · 15% of these records are
  • In the CMS Doctors and Clinicians fileNo · under 1% of these records are
  • Record last updated2007 · 76% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 183500000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

239 pharmacist records list a practice address in Walnut Creek

They are 239 of the 6,170 NPPES records with a practice address in Walnut Creek, and 32,533 pharmacist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 32,533 in California → Every provider in Walnut Creek → Pharmacist nationwide →

The 8 pharmacist records with the nearest ZIP codes

  1. Beckilynn CatalliWalnut Creek, CA 945961447318605
  2. Elizabeth Farr, BPHARMWalnut Creek, CA 945961033277082
  3. Audrey Fong, PHARM.D.Walnut Creek, CA 945961922170521
  4. Venessa Jn-BaptisteWalnut Creek, CA 945961215095443
  5. Hansheng Liou, PHARM.D.Walnut Creek, CA 945961508924036
  6. Zahi Mouchabeck, PHARM.DWalnut Creek, CA 945961306904396
  7. Denise Omen, RPHWalnut Creek, CA 945961598838773
  8. Douglas Ota, RPHWalnut Creek, CA 945961821161373

Common questions

What is Derek A. Dwinell, PHARM. D.'s NPI number?

Derek A. Dwinell, PHARM. D.'s National Provider Identifier (NPI) is 1629146378, issued on Dec 1, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Derek A. Dwinell, PHARM. D. located?

The NPPES record lists a practice address at 1425 S Main St, Walnut Creek, CA, 94596. Phone: (925) 295-4463. Providers update this record themselves, so call before visiting.

How can I verify Derek A. Dwinell, PHARM. D.'s license?

NPPES lists California license number 52953, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.