Mary Ruth Johnson, D.D.S.
General Practice Dentistry · Danville, CA
Mary Ruth Johnson, D.D.S. is a general practice dentistry with a practice address in Danville, California, and NPI 1568679645, issued on May 17, 2007. Check the license (California 33432, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Ruth Johnson
- Credential
- D.D.S.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 33432 CA
Self-reported in NPPES; status is on the state search - Practice location
- 75 Oak CT, Danville, CA 94526
- Phone
- (925) 837-2754
- Enumerated
- May 17, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (925) 837-9341
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 17,852 in California → Look up another NPI →
Verify Mary Ruth Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 33432Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average general practice dentistry in 2024
48 Medicare Part D claims for 36 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin31 claims
- Cephalexin11 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: $86.49
1 payment: gift; the largest payer was Ultradent Products Inc. The 41,669 providers of this specialty with any payment received $597.01 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.
Mary Ruth Johnson among 17,852 general practice dentistry records in California
Mary Ruth Johnson, D.D.S. is one of 17,852 general practice dentistry records with a practice address in California. 57% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 29% of them.
- NPI issued2007 · 29% of these records are older, 40% newer
- In a Medicare fileYes · 57% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 79% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
34 general practice dentistry records list a practice address in Danville
They are 34 of the 897 NPPES records with a practice address in Danville, and 17,852 general practice dentistry records in California.
All 17,852 in California → Every provider in Danville → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Cheryl Allan, DDSDanville, CA 945261396854923
- James Giblin, D.D.S.Danville, CA 945261609896141
- David Graham, DDSDanville, CA 945261861502957
- Dino Javaheri, D.D.SDanville, CA 945261366457111
- James Kobayashi, D.D.S.Danville, CA 945261942391909
- Melanie Koehler, DDSDanville, CA 945261265538334
- Mark Koenen, DDSDanville, CA 945261023111952
- Douglas Lins, D.D.S.Danville, CA 945261407942964
Common questions
What is Mary Ruth Johnson, D.D.S.'s NPI number?
Mary Ruth Johnson, D.D.S.'s National Provider Identifier (NPI) is 1568679645, issued on May 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mary Ruth Johnson, D.D.S. located?
The NPPES record lists a practice address at 75 Oak CT, Danville, CA, 94526. Phone: (925) 837-2754. Providers update this record themselves, so call before visiting.
How can I verify Mary Ruth Johnson, D.D.S.'s license?
NPPES lists California license number 33432, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Ruth Johnson, D.D.S. prescribe under Medicare Part D?
In 2024, Mary Ruth Johnson, D.D.S. had 48 Medicare Part D claims for 36 beneficiaries; the average among general practice dentistry prescribers was 83. 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.