John Sparrow Duffy, MD
Family Medicine Physician · Canton, NY
John Sparrow Duffy, MD is a family medicine physician with a practice address in Canton, New York, and NPI 1295710358, issued on Dec 13, 2005. Check the license (New York 284577, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- John Sparrow Duffy
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 284577 NY
Self-reported in NPPES; status is on the state search - Practice location
- 39 West Main Street, Canton, NY 13617
- Phone
- (315) 379-4700
- Enumerated
- Dec 13, 2005
- Record last updated
- Oct 21, 2022
- Fax
- (315) 713-6512
- Medicaid ID
- 04392256 NY
- Medicare enrollment
- Enrolled (PECOS I20160623001985); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,417 in New York → Look up another NPI →
Also registered at 39 West Main Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Sparrow Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 284577Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.7 times the Medicare Part D claims of the average family medicine physician in 2024
9,676 Medicare Part D claims for 561 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 136 claims were for opioids.
Most prescribed
- Levothyroxine Sodium464 claims
- Omeprazole449 claims
- Atorvastatin Calcium427 claims
- Pantoprazole Sodium354 claims
- Tamsulosin Hcl279 claims
- Amlodipine Besylate276 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.
2 hospitals and group practices
- Carthage Area Hospital IncOgdensburg, NY
- Claxton-Hepburn Medical CenterOgdensburg, NY · Psychiatric
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
John Sparrow Duffy among 6,417 family medicine physician records in New York
John Sparrow Duffy, MD is one of 6,417 family medicine physician records with a practice address in New York. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2003 · median 2007 among the 4,188 with a school on file
- Record last updated2022 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 family medicine physician records list a practice address in Canton
They are 9 of the 402 NPPES records with a practice address in Canton, and 6,417 family medicine physician records in New York.
All 6,417 in New York → Every provider in Canton → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Florence Bero, M.D.Canton, NY 136171508864539
- John Dewar, M.D.Canton, NY 136171518920081
- Gregory Healey, MDCanton, NY 136171558372086
- Brian Kerrigan, D.O.Canton, NY 136171649274275
- Sandra McCloy, M.D.Canton, NY 136171891758371
- Daniel Palmateer, M.D.Canton, NY 136171831152297
- Thushyanthan PathmalingamCanton, NY 136171104278555
- Thivisa Rajagopal, M.D.Canton, NY 136171659723005
Common questions
What is John Sparrow Duffy, MD's NPI number?
John Sparrow Duffy, MD's National Provider Identifier (NPI) is 1295710358, issued on Dec 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Sparrow Duffy, MD located?
The NPPES record lists a practice address at 39 West Main Street, Canton, NY, 13617. Phone: (315) 379-4700. Providers update this record themselves, so call before visiting.
How can I verify John Sparrow Duffy, MD's license?
NPPES lists New York license number 284577, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Sparrow Duffy, MD prescribe under Medicare Part D?
In 2024, John Sparrow Duffy, MD had 9,676 Medicare Part D claims for 561 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.