Cooper Differding, D.D.S
Dentist · Mill Valley, CA
Cooper Differding, D.D.S is a dentist with a practice address in Mill Valley, California, and NPI 1588011845, issued on May 17, 2016. Check the license (California 64885, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cooper Differding
- Credential
- D.D.S
- Primary taxonomy
- Dentist 122300000X
- License number
- 64885 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10 Willow St, Mill Valley, CA 94941
- Phone
- (415) 388-6100
- Enumerated
- May 17, 2016
- Record last updated
- Mar 17, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (415) 388-6100
- Entity
- Type 1 · individual
8 nearest dentist records → All 14,729 in California → Look up another NPI →
Also registered at 10 Willow St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Cooper Differding in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 64885Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average dentist in 2024
27 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.
Industry payments in 2024: $14.03
1 payment: food and beverage; the largest payer was Straumann USA LLC. The 31,974 providers of this specialty with any payment received $540.36 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Cooper Differding among 14,729 dentist records in California
Cooper Differding, D.D.S 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 2016, is newer than 70% of them.
- NPI issued2016 · 70% of these records are older, 27% 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 updated2018 · 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).
14 dentist records list a practice address in Mill Valley
They are 14 of the 653 NPPES records with a practice address in Mill Valley, and 14,729 dentist records in California.
All 14,729 in California → Every provider in Mill Valley → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Bryan Abrams, D.D.S.Mill Valley, CA 949411376737221
- Joseph Bauer, DDSMill Valley, CA 949411609975135
- Madison Brown, DDSMill Valley, CA 949411598596884
- Cynthia Fantacone, DDSMill Valley, CA 949411619010873
- Richard Garcia, DDSMill Valley, CA 949411114028719
- Lloyd Harris, DDSMill Valley, CA 949411679789127
- Tanya Harris, DDSMill Valley, CA 949411578779021
- Christopher Ivanoff, DDSMill Valley, CA 949411144049362
Common questions
What is Cooper Differding, D.D.S's NPI number?
Cooper Differding, D.D.S's National Provider Identifier (NPI) is 1588011845, issued on May 17, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Cooper Differding, D.D.S located?
The NPPES record lists a practice address at 10 Willow St, Mill Valley, CA, 94941. Phone: (415) 388-6100. Providers update this record themselves, so call before visiting.
How can I verify Cooper Differding, D.D.S's license?
NPPES lists California license number 64885, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Cooper Differding, D.D.S prescribe under Medicare Part D?
In 2024, Cooper Differding, D.D.S had 27 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.