Mark Wayne Williams, MD, PHD
Surgery Physician · Muscatine, IA
Mark Wayne Williams, MD, PHD is a surgery physician with a practice address in Muscatine, Iowa, and NPI 1417986001, issued on Jul 3, 2006. Check the license (Iowa 49587, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Mark Wayne Williams
- Credential
- MD, PHD
- Primary taxonomy
- Surgery Physician 208600000X
- License numbers
- 49587 IA
TL25609 SC
Self-reported in NPPES; status is on the state search - Practice location
- 1518 Mulberry Ave Ste 102, Muscatine, IA 52761
- Phone
- (563) 264-4112
- Enumerated
- Jul 3, 2006
- Record last updated
- Nov 14, 2025
- Medicaid ID
- 036116745 IL
- Medicare enrollment
- Enrolled (PECOS I20220603000531); accepts Medicare assignment
- Medical or professional school
- University Of North Carolina At Chapel Hill School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 437 in Iowa → Look up another NPI →
Verify Mark Wayne Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 49587Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average surgery physician in 2024
89 Medicare Part D claims for 72 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 47 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen33 claims
- Tramadol Hcl12 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
- Unity HealthcareMuscatine, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Wayne Williams among 437 surgery physician records in Iowa
Mark Wayne Williams, MD, PHD is one of 437 surgery physician records with a practice address in Iowa. 73% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 63% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2000 · median 2005 among the 218 with a school on file
- Record last updated2025 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in Iowa
There are 437 surgery physician records in Iowa.
All 437 in Iowa → Every provider in Muscatine → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Prasad Nadkarni, M.D.Muscatine, IA 527611912993965
- Brandt Lapschies, M.D.Clinton, IA 527321174634364
- Maggie Limoges-Davies, D.O.Clinton, IA 527321104119965
- Ricky Maddox, MDClinton, IA 527321982675542
- James Olney, M.D.Clinton, IA 527321467403048
- Jason Deutmeyer, MDBettendorf, IA 527221104899095
- Sara Glassgow, D.O.Bettendorf, IA 527221235343674
- Isaac Hinton, DOBettendorf, IA 527221891112579
Common questions
What is Mark Wayne Williams, MD, PHD's NPI number?
Mark Wayne Williams, MD, PHD's National Provider Identifier (NPI) is 1417986001, issued on Jul 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Wayne Williams, MD, PHD located?
The NPPES record lists a practice address at 1518 Mulberry Ave Ste 102, Muscatine, IA, 52761. Phone: (563) 264-4112. Providers update this record themselves, so call before visiting.
How can I verify Mark Wayne Williams, MD, PHD's license?
NPPES lists Iowa license number 49587, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Wayne Williams, MD, PHD prescribe under Medicare Part D?
In 2024, Mark Wayne Williams, MD, PHD had 89 Medicare Part D claims for 72 beneficiaries; the average among surgery physician prescribers was 147. 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.