Mark L. Stillwell, M.D.
Infectious Disease Physician · Fort Smith, AR
Mark L. Stillwell, M.D. is an infectious disease physician with a practice address in Fort Smith, Arkansas, and NPI 1568459451, issued on Oct 5, 2005. Check the license (Arkansas N7411, as entered in NPPES) on the Arkansas State Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark L. Stillwell
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- N7411 AR
Self-reported in NPPES; status is on the state search - Practice location
- 6801 Rogers Ave FL 5, Fort Smith, AR 72903
- Phone
- (479) 274-4100
- Enumerated
- Oct 5, 2005
- Record last updated
- Oct 18, 2024
- Fax
- (479) 274-4199
- Medicaid IDs
- 114655001 AR
100123480A AR - Medicare enrollment
- Enrolled (PECOS I20040924000537); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1982
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 38 in Arkansas → Look up another NPI →
Also registered at 6801 Rogers Ave FL 5
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shay Barfield, APRNFamily Nurse Practitioner1942785100
- Jenna Clark, MS, RD, LD, CPTRegistered Dietitian1497387716
- Brooke HouserOptometrist1780188193
- Joanne Johnson, APRNNurse Practitioner1063119113
- Chetan Soni, MDOphthalmology Physician1598876526
- Leslie Ziegler, M.D.Internal Medicine Physician1306081799
Verify Mark L. Stillwell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArkansas State Medical Board
Search for license N7411Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average infectious disease physician in 2024
74 Medicare Part D claims for 16 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D.
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
- Mercy Clinic Fort Smith CommunitiesFort Smith, AR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark L. Stillwell among 38 infectious disease physician records in Arkansas
Mark L. Stillwell, M.D. is one of 38 infectious disease physician records with a practice address in Arkansas. 87% 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, 97% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1982 · median 2010 among the 28 with a school on file
- Record last updated2024 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Arkansas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Arkansas
There are 38 infectious disease physician records in Arkansas.
All 38 in Arkansas → Every provider in Fort Smith → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Kevin Davis, M.D.Fort Smith, AR 729031033452990
- Raed Khairy, MDFort Smith, AR 729011538384623
- Andrew Ebers, M.D.Rogers, AR 727581689931941
- Daniel Young, MDRogers, AR 727581265656425
- James Newton, M.D.Fayetteville, AR 727031558336602
- Cole WoodFayetteville, AR 727031609307248
- Carl Abraham, M.D.Jonesboro, AR 724011295774388
- Ashwini Gotimukul, MDJonesboro, AR 724011801474325
Common questions
What is Mark L. Stillwell, M.D.'s NPI number?
Mark L. Stillwell, M.D.'s National Provider Identifier (NPI) is 1568459451, issued on Oct 5, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark L. Stillwell, M.D. located?
The NPPES record lists a practice address at 6801 Rogers Ave FL 5, Fort Smith, AR, 72903. Phone: (479) 274-4100. Providers update this record themselves, so call before visiting.
How can I verify Mark L. Stillwell, M.D.'s license?
NPPES lists Arkansas license number N7411, as entered by the provider. Search the Arkansas State Medical Board at https://armedicalboard.adh.arkansas.gov/public/verify/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark L. Stillwell, M.D. prescribe under Medicare Part D?
In 2024, Mark L. Stillwell, M.D. had 74 Medicare Part D claims for 16 beneficiaries; the average among infectious disease physician prescribers was 689. 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.