NPPES file of Aug 9, 2026

Mark A. Williams, M.D.

Internal Medicine Physician · Louisville, KY

Mark A. Williams, M.D. is an internal medicine physician with a practice address in Louisville, Kentucky, and NPI 1710179585, issued on Aug 15, 2007. Check the license (Kentucky 34119, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1710179585
Name
Mark A. Williams
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
34119 KY
Self-reported in NPPES; status is on the state search
Practice location
12010 Shelbyville RD, Louisville, KY 40243
Phone
(502) 244-9355
Enumerated
Aug 15, 2007
Record last updated
Jun 17, 2024
Fax
(502) 244-9577
Medicare enrollment
Enrolled (PECOS I20040917000045); accepts Medicare assignment
Medical or professional school
University Of Louisville School Of Medicine, 1997
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 1,526 in Kentucky → Look up another NPI →

Also registered at 12010 Shelbyville RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Michael Davis, MDInternal Medicine Physician1124064225
  2. Suraj Gathani, M.D.Family Medicine Physician1902172067
  3. William King, M.D.Emergency Medicine Physician1295898807
  4. Vincent Lang, MDFamily Medicine Physician1083672620
  5. Alexander Morgan, MDOccupational Medicine Physician1538256201
  6. Francis Ong, MDEmergency Medicine Physician1609871995

Verify Mark A. Williams in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersKentucky Board of Medical Licensure
    Search for license 34119    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Kentucky license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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2.3 times the Medicare Part D claims of the average internal medicine physician in 2024

7,393 Medicare Part D claims for 365 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 35 claims were for opioids.

  1. Mark Williams7,393
  2. Specialty average3,176

Most prescribed

  1. Atorvastatin Calcium682 claims
  2. Levothyroxine Sodium422 claims
  3. Amlodipine Besylate370 claims
  4. Rosuvastatin Calcium275 claims
  5. Meloxicam240 claims
  6. Lisinopril235 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: $3,186.28

98 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.

  1. Mark Williams$3,186.28
  2. Specialty average$1,303.06

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

  1. Baptist Health Medical Group IncLouisville, KY

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Mark A. Williams among 1,526 internal medicine physician records in Kentucky

Mark A. Williams, M.D. is one of 1,526 internal medicine physician records with a practice address in Kentucky. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 49% of them.

  • NPI issued2007 · 49% of these records are older, 44% newer
  • In a Medicare fileYes · 84% of these records are
  • In the CMS Doctors and Clinicians fileYes · 67% of these records are
  • Graduated1997 · median 2006 among the 1,025 with a school on file
  • Record last updated2024 · 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 Kentucky practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

457 internal medicine physician records list a practice address in Louisville

They are 457 of the 21,891 NPPES records with a practice address in Louisville, and 1,526 internal medicine physician records in Kentucky.

All 1,526 in Kentucky → Every provider in Louisville → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Walter Bruning, MDLouisville, KY 402431063419901
  2. Lidia Castillo Cruz, MDLouisville, KY 402431366023806
  3. Paul Ciliberti, MDLouisville, KY 402431194874586
  4. Michael Davis, MDLouisville, KY 402431124064225
  5. Charles Gaba, MDLouisville, KY 402431801866025
  6. Keith Krawiec, MDLouisville, KY 402431730186545
  7. Robert Palmer Ball, MDLouisville, KY 402431083775167
  8. Diane Rennirt, M.DLouisville, KY 402431124083969

Common questions

What is Mark A. Williams, M.D.'s NPI number?

Mark A. Williams, M.D.'s National Provider Identifier (NPI) is 1710179585, issued on Aug 15, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Mark A. Williams, M.D. located?

The NPPES record lists a practice address at 12010 Shelbyville RD, Louisville, KY, 40243. Phone: (502) 244-9355. Providers update this record themselves, so call before visiting.

How can I verify Mark A. Williams, M.D.'s license?

NPPES lists Kentucky license number 34119, as entered by the provider. Search the Kentucky Board of Medical Licensure at https://web1.ky.gov/GenSearch/LicenseSearch.aspx?AGY=5. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Mark A. Williams, M.D. prescribe under Medicare Part D?

In 2024, Mark A. Williams, M.D. had 7,393 Medicare Part D claims for 365 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.