William John Mainwaring, PA-C
Physician Assistant · Canton, OH
William John Mainwaring, PA-C is a physician assistant with a practice address in Canton, Ohio, and NPI 1710537709, issued on Sep 12, 2019. Check the license (Ohio 50.006143RX, as entered in NPPES) with the Ohio board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William John Mainwaring
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 50.006143RX OH
Self-reported in NPPES; status is on the state search - Practice location
- 2600 Sixth St SW, Canton, OH 44710
- Phone
- (330) 363-6203
- Enumerated
- Sep 12, 2019
- Record last updated
- Sep 16, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 5,325 in Ohio → Look up another NPI →
Also registered at 2600 Sixth St SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William John Mainwaring in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Ohio board licenses this profession
Search for license 50.006143RXCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average physician assistant in 2024
44 Medicare Part D claims for 35 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen12 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: $18.19
1 payment: food and beverage; the largest payer was Abbvie Inc. The 64,719 providers of this specialty with any payment received $841.65 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.
William John Mainwaring among 5,325 physician assistant records in Ohio
William John Mainwaring, PA-C is one of 5,325 physician assistant records with a practice address in Ohio. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 52% of them.
- NPI issued2019 · 52% of these records are older, 42% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 68% of these records are
- Record last updated2019 · 37% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
92 physician assistant records list a practice address in Canton
They are 92 of the 5,763 NPPES records with a practice address in Canton, and 5,325 physician assistant records in Ohio.
All 5,325 in Ohio → Every provider in Canton → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Arlene Barthels, PA-CCanton, OH 447101861468225
- Catalina Bernier, PA-CCanton, OH 447101902088297
- Kasey Cook, PA-CCanton, OH 447101275800799
- Christina Cristino, PA-CCanton, OH 447101891156964
- Aleena Eigel, PA-CCanton, OH 447101578018099
- Erin Fitzpatrick, PA-CCanton, OH 447101750759189
- Brittany Levitt, PA-CCanton, OH 447101144651282
- Brent Nowicki, PACanton, OH 447101861971137
Common questions
What is William John Mainwaring, PA-C's NPI number?
William John Mainwaring, PA-C's National Provider Identifier (NPI) is 1710537709, issued on Sep 12, 2019. An NPI identifies a provider in billing; it is not a license.
Where is William John Mainwaring, PA-C located?
The NPPES record lists a practice address at 2600 Sixth St SW, Canton, OH, 44710. Phone: (330) 363-6203. Providers update this record themselves, so call before visiting.
How can I verify William John Mainwaring, PA-C's license?
NPPES lists Ohio license number 50.006143RX, as entered by the provider. Search the Ohio board that licenses this profession; the NPPES record confirms identity only.
How much does William John Mainwaring, PA-C prescribe under Medicare Part D?
In 2024, William John Mainwaring, PA-C had 44 Medicare Part D claims for 35 beneficiaries; the average among physician assistant prescribers was 830. 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.