William Gilmor Leffler, D.D.S.
Dentist · Massillon, OH
William Gilmor Leffler, D.D.S. is a dentist with a practice address in Massillon, Ohio, and NPI 1932411881, issued on Jul 8, 2010. Check the license (Ohio 15827, as entered in NPPES) with the Ohio board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Gilmor Leffler
- Credential
- D.D.S.
- Primary taxonomy
- Dentist 122300000X
- License number
- 15827 OH
Self-reported in NPPES; status is on the state search - Practice location
- 2300 Wales Ave NW, Massillon, OH 44646
- Phone
- (330) 832-2221
- Enumerated
- Jul 8, 2010
- Record last updated
- Jul 8, 2010 (not updated in 16 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest dentist records → All 2,780 in Ohio → Look up another NPI →
Also registered at 2300 Wales Ave NW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark SimonFamily Medicine Physician1053307694
- Lynne Wilson, CNPPrimary Care Nurse Practitioner1851782627
Verify William Gilmor Leffler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Ohio board licenses this profession
Search for license 15827Check 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 23 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin23 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.
William Gilmor Leffler among 2,780 dentist records in Ohio
William Gilmor Leffler, D.D.S. is one of 2,780 dentist records with a practice address in Ohio. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 50% of them.
- NPI issued2010 · 50% of these records are older, 48% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2010 · 70% 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 Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
12 dentist records list a practice address in Massillon
They are 12 of the 925 NPPES records with a practice address in Massillon, and 2,780 dentist records in Ohio.
All 2,780 in Ohio → Every provider in Massillon → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Andreas Baltzly, DDSMassillon, OH 446461275010654
- Jonathan-Jay Cashwell, DDSMassillon, OH 446461942856968
- Chad Coyle, DDS, MBAMassillon, OH 446461588047385
- James Gesiotto, D.M.D.Massillon, OH 446461689755639
- Michael Hulit, DDSMassillon, OH 446461013924901
- Jon Paulus, D.D.S.Massillon, OH 446461528169455
- Daniel Paulus, D.D.SMassillon, OH 446461326393968
- Kathleen Petit, DDSMassillon, OH 446461679579064
Common questions
What is William Gilmor Leffler, D.D.S.'s NPI number?
William Gilmor Leffler, D.D.S.'s National Provider Identifier (NPI) is 1932411881, issued on Jul 8, 2010. An NPI identifies a provider in billing; it is not a license.
Where is William Gilmor Leffler, D.D.S. located?
The NPPES record lists a practice address at 2300 Wales Ave NW, Massillon, OH, 44646. Phone: (330) 832-2221. Providers update this record themselves, so call before visiting.
How can I verify William Gilmor Leffler, D.D.S.'s license?
NPPES lists Ohio license number 15827, as entered by the provider. Search the Ohio board that licenses this profession; the NPPES record confirms identity only.
How much does William Gilmor Leffler, D.D.S. prescribe under Medicare Part D?
In 2024, William Gilmor Leffler, D.D.S. had 28 Medicare Part D claims for 23 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.