Dr. Cooper Differding , DDS
Dentist β’ Mill Valley, CA
10 Willow St
Mill Valley, CA 949412845
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on May 17, 2016; this date does not establish years in practice.
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Published CMS data list 18 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Amoxicillin β 18 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table Β· Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 75% of clinicians listed under Dentist in California (2024, 5,272 clinicians with data). Median for this group: 38. Middle half: 19 to 76.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 11 in 2023 to 18 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2023β2024.
Practice Location & Contact Primary Location
10 Willow St
Mill Valley, CA 949412845
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Berkeley, CA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Dentist: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
18 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$90 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $14.03 in 2024
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2024.
NPI first issued
2016
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Mill Valley and California
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 75% of clinicians listed under Dentist in California (2024, 5,272 clinicians with data). Median for this group: 38. Middle half: 19 to 76.
Too few clinicians listed under Dentist in Mill Valley have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 65% of clinicians listed under Dentist in California (2024, 5,272 clinicians with data). Median for this group: $154. Middle half: $75 to $339.
Too few clinicians listed under Dentist in Mill Valley have Medicare Part D data for 2024 to compare.
14 active clinicians are listed under Dentist with a practice address in Mill Valley, CA (14,738 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Mill Valley
0% of these 14 clinicians have the CMS telehealth indicator.
0% of these 14 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 11 in 2023 to 18 in 2024.
- 2023: 11
- 2024: 18
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30-day fills
30-day fills went from 11 in 2023 to 18 in 2024.
- 2023: 11
- 2024: 18
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Part D drug cost
Part D drug cost went from $60 in 2023 to $90 in 2024.
- 2023: $60
- 2024: $90
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $13.85 in 2019 to $14.03 in 2024.
- 2019: $13.85
- 2023: $168.53
- 2024: $14.03
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2024 (payments made January 1 β December 31, 2024): fewer than 11 records totaling $14.03.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Straumann USA LLC |
Food and Beverage
Cash or cash equivalent
|
β | General | $14.03 |
Source: CMS Open Payments, program year 2024, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Amoxicillin | Amoxicillin | 18 | 171 | $89.60 | 17 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 122300000X
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.
Secondary Practice Locations
3017 Telegraph Ave, Suite 300
Berkeley, CA 947052049
Phone: 5108491500
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
NPI status registered as active in NPPES database
Registered at 10 WILLOW ST, MILL VALLEY, CA 949412845 (Tel: 4153886100)
Registered at 10 WILLOW ST STE 6, MILL VALLEY, CA 949412895 (Tel: 4153886100)
Recorded as COOPER DIFFERDING, D.D.S
Dentist (license number reported to NPPES: CA 64885)
NPI status registered as active in NPPES database
Registered at 3017 TELEGRAPH AVE, SUITE 300, BERKELEY, CA 947052049 (Tel: 5108491500)
Registered at 3017 TELEGRAPH AVE, SUITE 300, BERKELEY, CA 947052049 (Tel: 5108491500)
Recorded as COOPER DIFFERDING, D.D.S
Dentist (license number reported to NPPES: CA 64885)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Dentists in Mill Valley
All Dentists in Mill ValleyMailing Address
10 Willow St Ste 6
Mill Valley, CA 949412895
Phone: 4153886100