Harley Jill Williams, D.M.D.
Periodontics · Livermore, CA
Harley Jill Williams, D.M.D. is a periodontics with a practice address in Livermore, California, and NPI 1013190255, issued on Dec 11, 2007. Check the license (California 39109, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Harley Jill Williams
- Credential
- D.M.D.
- Primary taxonomy
- Periodontics 1223P0300X
- License number
- 39109 CA
Self-reported in NPPES; status is on the state search - Practice location
- 999 E Stanley Blvd, Livermore, CA 94550
- Phone
- (925) 371-0300
- Enumerated
- Dec 11, 2007
- Record last updated
- Dec 11, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (925) 371-0800
- Entity
- Type 1 · individual
8 nearest periodontics records → All 929 in California → Look up another NPI →
Also registered at 999 E Stanley Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anthony Alvarez, DDSDentist1710916192
- Max Hsiao, DMDGeneral Practice Dentistry1336099928
- Steven Williams, D.M.D.Endodontics1780867820
Verify Harley Jill Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 39109Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average periodontics in 2024
175 Medicare Part D claims for 82 beneficiaries, against an average of 277 among the 4,191 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin56 claims
- Ibuprofen21 claims
- Sodium Fluoride Sensitive19 claims
- Chlorhexidine Gluconate11 claims
- Prevident 5000 Enamel Protect11 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.
Harley Jill Williams among 929 periodontics records in California
Harley Jill Williams, D.M.D. is one of 929 periodontics records with a practice address in California. 69% 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 · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 78% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223P0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Periodontics providers in California
There are 929 periodontics records in California.
All 929 in California → Every provider in Livermore → Periodontics nationwide →
The 8 periodontics records with the nearest ZIP codes
- Robert Brandes, D.D.S.Livermore, CA 945501114165255
- Edwin Tsang, DMD, MSDLivermore, CA 945501255957882
- Michele Vignaroli, D.D,S,Livermore, CA 945501063638799
- Filippo Cangini, DDS, MSLafayette, CA 945491205049137
- Eric Martin, DDSLafayette, CA 945491447335682
- Jordan Richert, DMDLafayette, CA 945491194160689
- Huei-Ling Chang, D.D.S.Fremont, CA 945551992943716
- Jacob Goldenberg, D.D.S.Napa, CA 945581306974779
Common questions
What is Harley Jill Williams, D.M.D.'s NPI number?
Harley Jill Williams, D.M.D.'s National Provider Identifier (NPI) is 1013190255, issued on Dec 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Harley Jill Williams, D.M.D. located?
The NPPES record lists a practice address at 999 E Stanley Blvd, Livermore, CA, 94550. Phone: (925) 371-0300. Providers update this record themselves, so call before visiting.
How can I verify Harley Jill Williams, D.M.D.'s license?
NPPES lists California license number 39109, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Harley Jill Williams, D.M.D. prescribe under Medicare Part D?
In 2024, Harley Jill Williams, D.M.D. had 175 Medicare Part D claims for 82 beneficiaries; the average among periodontics prescribers was 277. 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.