Clark H. Willis, MD
Emergency Medicine Physician · Salisbury, MD
Clark H. Willis, MD is an emergency medicine physician with a practice address in Salisbury, Maryland, and NPI 1700865623, issued on Jan 10, 2006. Check the license (Maryland D0063374, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Clark H. Willis
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- D0063374 MD
Self-reported in NPPES; status is on the state search - Practice location
- 100 E Carroll St, Salisbury, MD 21801
- Phone
- (410) 543-7100
- Enumerated
- Jan 10, 2006
- Record last updated
- Jul 13, 2026
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,190 in Maryland → Look up another NPI →
Also registered at 100 E Carroll St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Gajendra AcharyaStudent in an Organized Health Care Education/Training Program1477249217
- John AcheyFamily Nurse Practitioner1245931831
- Keila Addlesberger, PTAPhysical Therapy Assistant1326335605
Verify Clark H. Willis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0063374Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% more Medicare Part D claims than the average emergency medicine physician in 2024
257 Medicare Part D claims for 205 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 18 claims were for opioids.
Most prescribed
- Cephalexin46 claims
- Ciprofloxacin Hcl44 claims
- Cyclobenzaprine Hcl17 claims
- Prednisone15 claims
- Sulfamethoxazole-Trimethoprim15 claims
- Oxycodone-Acetaminophen13 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Clark H. Willis among 1,190 emergency medicine physician records in Maryland
Clark H. Willis, MD is one of 1,190 emergency medicine physician records with a practice address in Maryland. 77% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 59% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 48% of these records are
- Record last updated2026 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Maryland
There are 1,190 emergency medicine physician records in Maryland.
All 1,190 in Maryland → Every provider in Salisbury → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Kathleen Devine, MDSalisbury, MD 218011326027434
- Walter Gianelle, MDSalisbury, MD 218011124007232
- Jeffrey Greenwood, MDSalisbury, MD 218011255310272
- Glenn Hornstein, MDSilisbury, MD 218011245219260
- Robert Klug, MDSalisbury, MD 218011538148549
- Elizabeth Koval, MDSalisbury, MD 218011215900691
- M Cristina Lazostefanini, MDSalisbury, MD 218011730168733
- James Little, DOSalisbury, MD 218011033198031
Common questions
What is Clark H. Willis, MD's NPI number?
Clark H. Willis, MD's National Provider Identifier (NPI) is 1700865623, issued on Jan 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Clark H. Willis, MD located?
The NPPES record lists a practice address at 100 E Carroll St, Salisbury, MD, 21801. Phone: (410) 543-7100. Providers update this record themselves, so call before visiting.
How can I verify Clark H. Willis, MD's license?
NPPES lists Maryland license number D0063374, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Clark H. Willis, MD prescribe under Medicare Part D?
In 2024, Clark H. Willis, MD had 257 Medicare Part D claims for 205 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Clark H. Willis, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.