Mark A. Williams, MD
Internal Medicine Physician · Johnson City, TN
Mark A. Williams, MD is an internal medicine physician with a practice address in Johnson City, Tennessee, and NPI 1033114988, issued on Jun 16, 2005. Check the license (Tennessee 24923, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark A. Williams
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 24923 TN
Self-reported in NPPES; status is on the state search - Practice location
- 301 Med Tech Pkwy, Johnson City, TN 37604
- Phone
- (423) 794-5520
- Enumerated
- Jun 16, 2005
- Record last updated
- Feb 24, 2025
- Fax
- (423) 282-6940
- Medicaid IDs
- 1521184 TN
3091551 TN - Medicare enrollment
- Enrolled (PECOS I20100210000097); accepts Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 1992
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,596 in Tennessee → Look up another NPI →
Also registered at 301 Med Tech Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vanessa Ailey, CNMAdvanced Practice Midwife1265838650
- Boyce Berry, M.D.Pediatrics Physician1992700041
- Stephen Box, M.D.Obstetrics & Gynecology Physician1326044892
- William Bridgforth, M.D.Pediatrics Physician1740285881
- Paul Brown, MDInternal Medicine Physician1326043167
- Matthew Cary, MDInternal Medicine Physician1306841440
Verify Mark A. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 24923Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.5 times the Medicare Part D claims of the average internal medicine physician in 2024
17,517 Medicare Part D claims for 820 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 780 claims were for opioids.
Most prescribed
- Levothyroxine Sodium679 claims
- Rosuvastatin Calcium601 claims
- Amlodipine Besylate582 claims
- Atorvastatin Calcium529 claims
- Alprazolam474 claims
- Losartan Potassium409 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: $191.92
10 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 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 one group practice
- State OF Franklin Healthcare Associates, PLLCJohnson City, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Williams among 2,596 internal medicine physician records in Tennessee
Mark A. Williams, MD is one of 2,596 internal medicine physician records with a practice address in Tennessee. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 85% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1992 · median 2003 among the 1,705 with a school on file
- Record last updated2025 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
125 internal medicine physician records list a practice address in Johnson City
They are 125 of the 3,807 NPPES records with a practice address in Johnson City, and 2,596 internal medicine physician records in Tennessee.
All 2,596 in Tennessee → Every provider in Johnson City → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Paul Brown, MDJohnson City, TN 376041326043167
- Matthew Cary, MDJohnson City, TN 376041306841440
- Keith Cook, MDJohnson City, TN 376041396740957
- Frank Forbush, MDJohnson City, TN 376041538164660
- Mary Gibson, MDJohnson City, TN 376041164427290
- Michael Grosserode, MDJohnson City, TN 376041710982848
- Christopher Hemphill, MDJohnson City, TN 376041053316232
- Randy Hoover, MDJohnson City, TN 376041255336434
Common questions
What is Mark A. Williams, MD's NPI number?
Mark A. Williams, MD's National Provider Identifier (NPI) is 1033114988, issued on Jun 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Williams, MD located?
The NPPES record lists a practice address at 301 Med Tech Pkwy, Johnson City, TN, 37604. Phone: (423) 794-5520. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Williams, MD's license?
NPPES lists Tennessee license number 24923, 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 Mark A. Williams, MD prescribe under Medicare Part D?
In 2024, Mark A. Williams, MD had 17,517 Medicare Part D claims for 820 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.