Derek Max Downing, DDS
Dentist · Winchester, CA
Derek Max Downing, DDS is a dentist with a practice address in Winchester, California, and NPI 1881388924, issued on Jun 2, 2023. Check the license (California DDS111399, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Derek Max Downing
- Credential
- DDS
- Primary taxonomy
- Dentist 122300000X
- License numbers
- DDS111399 CA
7765 OK
Self-reported in NPPES; status is on the state search - Practice location
- 32897 Western Hills Dr Ste 102, Winchester, CA 92596
- Phone
- (951) 335-5169
- Enumerated
- Jun 2, 2023
- Record last updated
- May 2, 2025
- Entity
- Type 1 · individual
8 nearest dentist records → All 14,729 in California → Look up another NPI →
Verify Derek Max Downing in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license DDS111399Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average dentist in 2024
28 Medicare Part D claims for 26 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin18 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.
Derek Max Downing among 14,729 dentist records in California
Derek Max Downing, DDS is one of 14,729 dentist records with a practice address in California. 56% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 89% of them.
- NPI issued2023 · 89% of these records are older, 7% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2025 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 dentist records list a practice address in Winchester
They are 4 of the 209 NPPES records with a practice address in Winchester, and 14,729 dentist records in California.
All 14,729 in California → Every provider in Winchester → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Meena Matloob, DMDWinchester, CA 925961992304497
- Christian Mendoza, DMDWinchester, CA 925961194341776
- Mehrnaz Parsi, D.M.DWinchester, CA 925961568813913
- Erene AttallaWildomar, CA 925951891154282
- Diana Do-Yabut, DMDWildomar, CA 925951538145867
- Danika Fellows, DDSWildomar, CA 925951710772967
- James Hoch, D.D.S.Wildomar, CA 925951457510364
- Emily Hung, D.D.S.Wildomar, CA 925951114112489
Common questions
What is Derek Max Downing, DDS's NPI number?
Derek Max Downing, DDS's National Provider Identifier (NPI) is 1881388924, issued on Jun 2, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Derek Max Downing, DDS located?
The NPPES record lists a practice address at 32897 Western Hills Dr Ste 102, Winchester, CA, 92596. Phone: (951) 335-5169. Providers update this record themselves, so call before visiting.
How can I verify Derek Max Downing, DDS's license?
NPPES lists California license number DDS111399, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Derek Max Downing, DDS prescribe under Medicare Part D?
In 2024, Derek Max Downing, DDS had 28 Medicare Part D claims for 26 beneficiaries; the average among dentist prescribers was 86. 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.