Mark D. Williams, MD
Pulmonary Disease Physician · Indianapolis, IN
Mark D. Williams, MD is a pulmonary disease physician with a practice address in Indianapolis, Indiana, and NPI 1659461564, issued on Oct 13, 2006. Check the license (Indiana 01041431A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Mark D. Williams
- Credential
- MD
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- 01041431A IN
Self-reported in NPPES; status is on the state search - Practice location
- 1801 N Senate Ave, Indianapolis, IN 46202
- Phone
- (317) 962-5820
- Enumerated
- Oct 13, 2006
- Record last updated
- Mar 15, 2025
- Fax
- (317) 962-3916
- Medicaid ID
- 200104270 IN
- Medicare enrollment
- Enrolled (PECOS I20120202000899); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 280 in Indiana → Look up another NPI →
Also registered at 1801 N Senate Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Laura Macmillan, NPGerontology Nurse Practitioner1699552430
- Ronald Mastouri, MDCardiovascular Disease Physician1134389968
- Jennifer Mitchell, BSN CCRN RNCritical Care Medicine Registered Nurse1184417081
- Danielle Mullins, PHARMDPharmacist1063645927
- Kirk Mulroney, PT MSPhysical Therapist1598860025
- Shanelle Reynolds, NPFamily Nurse Practitioner1225815681
Verify Mark D. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01041431ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
29 Medicare Part D claims, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Bills Medicare through one group practice
- IU Health Medical Group LLCIndianapolis, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark D. Williams among 280 pulmonary disease physician records in Indiana
Mark D. Williams, MD is one of 280 pulmonary disease physician records with a practice address in Indiana. 86% 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 19% of them.
- NPI issued2006 · 19% of these records are older, 48% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated1990 · median 2000 among the 219 with a school on file
- Record last updated2025 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in Indiana
There are 280 pulmonary disease physician records in Indiana.
All 280 in Indiana → Every provider in Indianapolis → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Farzad Loghmani, MDIndianapolis, IN 462021689639130
- Michael Lykens, MDIndianapolis, IN 462021417912478
- Roberto Machado, MDIndianapolis, IN 462021942268172
- David Miller, M.D.Indianapolis, IN 462021194780163
- Michael Niemeier, M.D.Indianapolis, IN 462021831190156
- Scott Roberts, M.D.Indianapolis, IN 462021982605044
- Aruna Sannuti, M.D.Indianapolis, IN 462021073578530
- Francis Sheski, MDIndianapolis, IN 462021225093784
Common questions
What is Mark D. Williams, MD's NPI number?
Mark D. Williams, MD's National Provider Identifier (NPI) is 1659461564, issued on Oct 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark D. Williams, MD located?
The NPPES record lists a practice address at 1801 N Senate Ave, Indianapolis, IN, 46202. Phone: (317) 962-5820. Providers update this record themselves, so call before visiting.
How can I verify Mark D. Williams, MD's license?
NPPES lists Indiana license number 01041431A, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark D. Williams, MD prescribe under Medicare Part D?
In 2024, Mark D. Williams, MD had 29 Medicare Part D claims; the average among pulmonary disease physician prescribers was 1,425. 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.