Kenneth Mark Duffy, M.D.
Family Medicine Physician · Seiling, OK
Kenneth Mark Duffy, M.D. is a family medicine physician with a practice address in Seiling, Oklahoma, and NPI 1164421970, issued on Jul 14, 2005. Check the license (Oklahoma 12688, as entered in NPPES) on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- Kenneth Mark Duffy
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 12688 OK
Self-reported in NPPES; status is on the state search - Practice location
- 809 NE Highway 60, Seiling, OK 73663
- Phone
- (580) 922-4283
- Enumerated
- Jul 14, 2005
- Record last updated
- Jun 5, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (580) 922-7717
- Medicaid ID
- 100094530A OK
- Medicare enrollment
- Enrolled (PECOS I20100129000185); accepts Medicare assignment
- Medical or professional school
- University Of Oklahoma College Of Medicine, 1979
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,303 in Oklahoma → Look up another NPI →
Verify Kenneth Mark Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOklahoma Board of Medical Licensure and Supervision
Search for license 12688Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% more Medicare Part D claims than the average family medicine physician in 2024
4,724 Medicare Part D claims for 278 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 246 claims were for opioids.
Most prescribed
- Potassium Chloride166 claims
- Tamsulosin Hcl149 claims
- Hydrocodone-Acetaminophen144 claims
- Glimepiride143 claims
- Levothyroxine Sodium137 claims
- Atorvastatin Calcium136 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.
The MIPS final score for 2023 (Medicare payment program): 12.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Kenneth Mark Duffy among 2,303 family medicine physician records in Oklahoma
Kenneth Mark Duffy, M.D. is one of 2,303 family medicine physician records with a practice address in Oklahoma. 79% 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, 87% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1979 · median 2008 among the 1,407 with a school on file
- Record last updated2009 · 60% 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 Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 family medicine physician records list a practice address in Seiling
They are 2 of the 11 NPPES records with a practice address in Seiling, and 2,303 family medicine physician records in Oklahoma.
All 2,303 in Oklahoma → Every provider in Seiling → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Gail Girouard, MDSeiling, OK 736631023062239
- Treva Graham, M.D.Sayre, OK 736621881773703
- Sonja Langley, M.D.Sayre, OK 736621962821074
- Melvin Robison, D.O.Sayre, OK 736621790887529
- Samantha Jackson, MDHobart, OK 736511104806967
- Michael Krieger, MDHobart, OK 736511649271727
- Craig Moore, MDHobart, OK 736511467411645
- Julie Schaufele, MDHobart, OK 736511376525568
Common questions
What is Kenneth Mark Duffy, M.D.'s NPI number?
Kenneth Mark Duffy, M.D.'s National Provider Identifier (NPI) is 1164421970, issued on Jul 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Kenneth Mark Duffy, M.D. located?
The NPPES record lists a practice address at 809 NE Highway 60, Seiling, OK, 73663. Phone: (580) 922-4283. Providers update this record themselves, so call before visiting.
How can I verify Kenneth Mark Duffy, M.D.'s license?
NPPES lists Oklahoma license number 12688, as entered by the provider. Search the Oklahoma Board of Medical Licensure and Supervision at https://www.okmedicalboard.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kenneth Mark Duffy, M.D. prescribe under Medicare Part D?
In 2024, Kenneth Mark Duffy, M.D. had 4,724 Medicare Part D claims for 278 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Kenneth Mark Duffy, M.D.'s MIPS final score?
The 2023 MIPS final score is 12.2 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.