Clifford G. Williamson, MD
Emergency Medicine Physician · Johnson City, TN
Clifford G. Williamson, MD is an emergency medicine physician with a practice address in Johnson City, Tennessee, and NPI 1154562304, issued on Mar 18, 2009. Check the license (Tennessee 52142, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Clifford G. Williamson
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 52142 TN
0101282637 VA
Self-reported in NPPES; status is on the state search - Practice location
- 325 N State OF Franklin RD, Johnson City, TN 37604
- Phone
- (423) 439-6283
- Enumerated
- Mar 18, 2009
- Record last updated
- Apr 29, 2025
- Medicaid ID
- 1154562304 VA
- Medicare enrollment
- Enrolled (PECOS I20220304001553); accepts Medicare assignment
- Medical or professional school
- East Tennessee State University Quillen College Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,174 in Tennessee → Look up another NPI →
Also registered at 325 N State OF Franklin RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashar Abdullah, MDStudent in an Organized Health Care Education/Training Program1235062548
- Usama Abu HeijaStudent in an Organized Health Care Education/Training Program1568033736
- Emmanuel Addo-Yobo, MDInternal Medicine Physician1922458678
- Summerlin AdkinsStudent in an Organized Health Care Education/Training Program1689596801
- Michael Agostino, DOStudent in an Organized Health Care Education/Training Program1033966890
- Armaan Ahmed, MDStudent in an Organized Health Care Education/Training Program1023792702
Verify Clifford G. Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 52142Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.5 times the Medicare Part D claims of the average emergency medicine physician in 2024
1,028 Medicare Part D claims for 276 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 110 claims were for opioids.
Most prescribed
- Oxycodone Hcl53 claims
- Levothyroxine Sodium42 claims
- Metoprolol Tartrate42 claims
- Pantoprazole Sodium40 claims
- Amlodipine Besylate38 claims
- Furosemide34 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: $19.96
1 payment: food and beverage; the largest payer was Coloplast Corp. The 12,335 providers of this specialty with any payment received $953.79 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.
Bills Medicare through 2 group practices
- Southeastern Physician Services PCBristol, VA
- Tri-Cities Regional Emergency Physicians, PCJohnson City, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Clifford G. Williamson among 1,174 emergency medicine physician records in Tennessee
Clifford G. Williamson, MD is one of 1,174 emergency medicine physician records with a practice address in Tennessee. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 56% of them.
- NPI issued2009 · 56% of these records are older, 41% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2009 · median 2012 among the 667 with a school on file
- Record last updated2025 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Tennessee
There are 1,174 emergency medicine physician records in Tennessee.
All 1,174 in Tennessee → Every provider in Johnson City → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Suzanne Allen, MDJohnson City, TN 376041336171412
- Borzou Azima, MDJohnson City, TN 376041447297692
- Clarence Goulding, MDJohnson City, TN 376041033292362
- Farshad Karimpour, M.D.Johnson City, TN 376041679768204
- William Lee, MDJohnson City, TN 376041417965633
- Nathaniel Lee, MDJohnson City, TN 376041407960222
- Morgan McClain, M.D.,Johnson City, TN 376041710173653
- Garik Misenar, MDJohnson City, TN 376041619084639
Common questions
What is Clifford G. Williamson, MD's NPI number?
Clifford G. Williamson, MD's National Provider Identifier (NPI) is 1154562304, issued on Mar 18, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Clifford G. Williamson, MD located?
The NPPES record lists a practice address at 325 N State OF Franklin RD, Johnson City, TN, 37604. Phone: (423) 439-6283. Providers update this record themselves, so call before visiting.
How can I verify Clifford G. Williamson, MD's license?
NPPES lists Tennessee license number 52142, 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 Clifford G. Williamson, MD prescribe under Medicare Part D?
In 2024, Clifford G. Williamson, MD had 1,028 Medicare Part D claims for 276 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.