Karen B. Duffy, MD
General Practice Physician · Madison, TN
Karen B. Duffy, MD is a general practice physician with a practice address in Madison, Tennessee, and NPI 1174543516, issued on Jul 20, 2006. Check the license (Tennessee MD0000008280, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Karen B. Duffy
- Credential
- MD
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- MD0000008280 TN
Self-reported in NPPES; status is on the state search - Practice location
- 1210 Briarville Road, Madison, TN 37115
- Phone
- (615) 868-9959
- Enumerated
- Jul 20, 2006
- Record last updated
- May 30, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (615) 865-1463
- Medicaid ID
- 3185053 TN
- Medicare enrollment
- Enrolled (PECOS I20040330001089); accepts Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 1973
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 169 in Tennessee → Look up another NPI →
Verify Karen B. Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license MD0000008280Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average general practice physician in 2024
573 Medicare Part D claims for 48 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Buprenorphine-Naloxone362 claims
- Suboxone50 claims
- Lisinopril16 claims
- Amitriptyline Hcl14 claims
- Trazodone Hcl12 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: $157.30
7 payments; by number, the most common kind was food and beverage; the largest payer was Braeburn Inc. The 4,259 providers of this specialty with any payment received $1,273.40 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.
Karen B. Duffy among 169 general practice physician records in Tennessee
Karen B. Duffy, MD is one of 169 general practice physician records with a practice address in Tennessee. 52% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 50% newer
- In a Medicare fileYes · 52% of these records are
- In the CMS Doctors and Clinicians fileYes · 33% of these records are
- Graduated1973 · median 1995 among the 55 with a school on file
- Record last updated2018 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Physician providers in Tennessee
There are 169 general practice physician records in Tennessee.
All 169 in Tennessee → Every provider in Madison → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Robert Cranfield, M.D.Madison, TN 371151407854532
- George Herda, M.D.Madison, TN 371151215938980
- Jacquelyn Lewchalermwong, M.D.Madison, TN 371151619296340
- Larry Dillaha, MDMount Juliet, TN 371221760769400
- William Wiseman, M.D.Mount Juliet, TN 371221235296104
- Donita Keown, M. D.Murfreesboro, TN 371291114208899
- Martin Glynn, M.D.Murfreesboro, TN 371301689710717
- Michael Macquarrie, MDMurfreesboro, TN 371301790766590
Common questions
What is Karen B. Duffy, MD's NPI number?
Karen B. Duffy, MD's National Provider Identifier (NPI) is 1174543516, issued on Jul 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen B. Duffy, MD located?
The NPPES record lists a practice address at 1210 Briarville Road, Madison, TN, 37115. Phone: (615) 868-9959. Providers update this record themselves, so call before visiting.
How can I verify Karen B. Duffy, MD's license?
NPPES lists Tennessee license number MD0000008280, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karen B. Duffy, MD prescribe under Medicare Part D?
In 2024, Karen B. Duffy, MD had 573 Medicare Part D claims for 48 beneficiaries; the average among general practice physician prescribers was 3,030. 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.