Dr. Mark D. Williams, MD
- Medicare services, 2021
- 99
- Part D claims, 2024
- 29
- Publications
- 16
- Hospital affiliations
- 1
- Industry payments
- $107,540
- Practice address
- 1701 N Senate Blvd, Indianapolis, IN 46202
- Practice phone
- Call (317) 962-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Williams' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark D. Williams is a pulmonologist in Indianapolis, Indiana
Dr. Williams practices at IU Health Methodist Hospital in Indianapolis, Indiana, part of Indiana University Health.
Dr. Williams' NPI, 1659461564, was assigned on October 13, 2006. Dr. Williams graduated from Indiana University School of Medicine in 1990. Dr. Williams holds Indiana license 01041431A.
- NPI
- 1659461564NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1153588199
- NPI enumeration date
- October 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (317) 962-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark D. Williams practices at IU Health Methodist Hospital in Indianapolis, Indiana
Dr. Williams' primary practice is IU Health Methodist Hospital, at 1701 N Senate Blvd, Indianapolis, IN 46202 in Marion County. The practice phone is (317) 962-2000.
- IU Health Methodist Hospital1701 N Senate Blvd, Indianapolis, IN 46202 · Marion CountyPhone(317) 962-2000
Source: Dmand AI Affiliation Data
Dr. Mark D. Williams is affiliated with 4 sites of care and 2 medical groups
Dr. Williams' primary practice is IU Health Methodist Hospital in Indianapolis, Indiana, part of Indiana University Health. The medical group on file is IU Health Medical Group. Dmand AI also links Dr. Williams to 1 more behavioral health center, 1 group practice or clinic, 1 ambulatory surgery center and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark D. Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| IU Health Methodist Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark D. Williams is one of 242 pulmonologists in Indiana
Pulmonary disease is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207RP1001X. Dr. Williams is licensed in Indiana.
Specialties and state licenses
- Pulmonary disease, IndianaPrimary
Pulmonologists near Dr. Williams
Counts of pulmonologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark D. Williams billed Medicare for 99 services in 2021
CMS data shows 99 Medicare services from Dr. Williams across 3 procedure codes in 2021. Medicare paid $13,310 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Williams' Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 6152021: 9984%
Dr. Williams compared with the Indiana median for pulmonologists, 2021
- Dr. Williams
- Indiana median
- Medicare services
- 99vs 74687% below
- Part D claims
- 25vs 83797% below
Medians across 247 pulmonologists in Indiana with Dmand AI profiles that report each measure.
Dr. Williams' most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Williams?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Williams and other pulmonologists in Indiana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark D. Williams' patients have a median age of 62
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 62, with 51% women.
Dr. Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women51%
- Men49%
Source: Dmand AI Patient Panel Data
Dr. Mark D. Williams wrote 29 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 29 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 25 of them, across 2 drugs with 11 or more claims each, at $71 in total drug cost. In 2022, CMS named 12 claims across 1 drug.
Dr. Williams' most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 122023: 25108%
Drugs named by CMS: 2 in 2023, 1 in 2022.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Mark D. Williams takes part in Medicare
Dr. Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Mark D. Williams has 16 publications on record
Dmand AI links 16 papers to Dr. Williams, published from 2010 to 2021. 2020 was the busiest year, with 3. The most frequent topics are Sepsis, Protein C and Recombinant Proteins. Dr. Williams has published most often in Clin Appl Thromb Hemost. Dr. Williams' most frequent co-authors are Ivor S. Douglas, MD, Andrew Shaw, MD and Amanda Temple Walborn.
Dr. Williams' papers by year, 2010 to 2021
Topics Dr. Williams writes about most
- Sepsis
- Protein C
- Recombinant Proteins
- Anti-Infective Agents
- Disseminated Intravascular Coagulation
- Disease Progression
- Double-Blind Method
- Intensive Care Units
Dr. Williams' most frequent co-authors
- Ivor S. Douglas, MD3 shared papers
- Andrew Shaw, MD2 shared papers
- Amanda Temple Walborn2 shared papers
Recent publications by Dr. Williams
Int J Environ Res Public Health
See who Dr. Williams researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Williams works with, so you can find a warm path to the right pulmonologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark D. Williams received $107,540 in industry payments from 2016 to 2022
CMS Open Payments shows 103 general payments to Dr. Williams from 5 drug and device companies from 2016 to 2022. Consulting fees make up the largest share, 41% of the total. Ferring Pharmaceuticals Inc. paid the most, $52,104.
General payments to Dr. Williams by program year, 2016 to 2022
General payments to Dr. Williams by kind, 2016 to 2022
- Consulting fees$43,82641%
- Honoraria$42,17039%
- Travel and lodging$15,51514%
- Speaker and faculty fees$3,8234%
- Food and beverage$2,2052%
Companies that paid Dr. Williams the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark D. Williams graduated from Indiana University School of Medicine
Dr. Williams graduated from Indiana University School of Medicine in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark D. Williams's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mark D. Williams
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mark D. Williams' NPI number?
Dr. Mark D. Williams' NPI number is 1659461564. It was assigned on October 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark D. Williams?
Dr. Mark D. Williams is a pulmonologist in Indianapolis, Indiana. The primary specialty in the NPI Registry is Pulmonary Disease Physician (taxonomy code 207RP1001X).
Where does Dr. Mark D. Williams practice?
Dr. Williams practices at 1701 N Senate Blvd, Indianapolis, IN 46202. Dr. Williams' primary practice is IU Health Methodist Hospital in Indianapolis, Indiana, part of Indiana University Health. Dmand AI also links Dr. Williams to 1 behavioral health center, 1 group practice or clinic, 1 ambulatory surgery center and 1 medical group.
What is Dr. Mark D. Williams' office phone number?
The practice phone on file for Dr. Williams is (317) 962-2000.
What is Dr. Mark D. Williams' medical license number?
Dr. Williams holds Indiana license 01041431A.
Which hospitals is Dr. Mark D. Williams affiliated with?
Dr. Williams practices at IU Health Methodist Hospital in Indianapolis, Indiana.
What medical group is Dr. Mark D. Williams part of?
Dr. Williams is linked to IU Health Medical Group. Dmand AI links Dr. Williams to 1 more medical group.
Does Dr. Mark D. Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 99 services in 2021, and Dr. Williams accepts Medicare assignment.
What services does Dr. Mark D. Williams bill to Medicare?
In 2021, Dr. Williams' most billed Medicare services were critical care (99291), hospital inpatient care (99233) and hospital inpatient care (99223).
Where did Dr. Mark D. Williams go to medical school?
Dr. Williams graduated from Indiana University School of Medicine in 1990.
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What drugs does Dr. Mark D. Williams prescribe most?
In 2023 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Ondansetron HCl and Amlodipine Besylate.
Has Dr. Mark D. Williams received payments from drug or device companies?
CMS Open Payments shows $107,540 in general payments to Dr. Williams from 5 companies from 2016 to 2022. The largest total came from Ferring Pharmaceuticals Inc.
How long has Dr. Mark D. Williams been practicing?
Dr. Williams graduated from medical school in 1990, 36 years ago.
Does Dr. Mark D. Williams do research?
Dmand AI links 16 publications to Dr. Williams, published from 2010 to 2021.
Who does Dr. Mark D. Williams publish with?
Dr. Williams' most frequent co-authors are Ivor S. Douglas, MD (3 shared papers), Andrew Shaw, MD (2 shared papers) and Amanda Temple Walborn (2 shared papers).
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