William Carson Markes, PA-C
Physician Assistant · Duluth, MN
William Carson Markes, PA-C is a physician assistant with a practice address in Duluth, Minnesota, and NPI 1902366396, issued on Mar 21, 2019. Check the license (Minnesota 12974, as entered in NPPES) with the Minnesota board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Carson Markes
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 12974 MN
Self-reported in NPPES; status is on the state search - Practice location
- 400 East Third Street, Duluth, MN 55805
- Phone
- (218) 786-8364
- Enumerated
- Mar 21, 2019
- Record last updated
- Mar 21, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190409001442); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,007 in Minnesota → Look up another NPI →
Also registered at 400 East Third Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Carson Markes in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Minnesota board licenses this profession
Search for license 12974Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average physician assistant in 2024
452 Medicare Part D claims for 164 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 49 claims were for opioids.
Most prescribed
- Tamsulosin Hcl102 claims
- Oxybutynin Chloride Er50 claims
- Finasteride48 claims
- Myrbetriq43 claims
- Oxycodone Hcl42 claims
- Solifenacin Succinate34 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
- St. Luke's Hospital OF DuluthDuluth, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Carson Markes among 4,007 physician assistant records in Minnesota
William Carson Markes, PA-C is one of 4,007 physician assistant records with a practice address in Minnesota. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 59% of them.
- NPI issued2019 · 59% of these records are older, 35% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated2018 · median 2017 among the 3,131 with a school on file
- Record last updated2019 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
179 physician assistant records list a practice address in Duluth
They are 179 of the 4,084 NPPES records with a practice address in Duluth, and 4,007 physician assistant records in Minnesota.
All 4,007 in Minnesota → Every provider in Duluth → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Michelle AndersonDuluth, MN 558051043247802
- Michael AnickDuluth, MN 558051053348136
- James Brych, PA-CDuluth, MN 558051912976176
- Matthew Evingson, PA-CDuluth, MN 558051053365965
- Shawn GarveyDuluth, MN 558051467481507
- Carrie HammesDuluth, MN 558051821020744
- Deanna HughesDuluth, MN 558051578596417
- Kimberly LakhanDuluth, MN 558051023048238
Common questions
What is William Carson Markes, PA-C's NPI number?
William Carson Markes, PA-C's National Provider Identifier (NPI) is 1902366396, issued on Mar 21, 2019. An NPI identifies a provider in billing; it is not a license.
Where is William Carson Markes, PA-C located?
The NPPES record lists a practice address at 400 East Third Street, Duluth, MN, 55805. Phone: (218) 786-8364. Providers update this record themselves, so call before visiting.
How can I verify William Carson Markes, PA-C's license?
NPPES lists Minnesota license number 12974, as entered by the provider. Search the Minnesota board that licenses this profession; the NPPES record confirms identity only.
How much does William Carson Markes, PA-C prescribe under Medicare Part D?
In 2024, William Carson Markes, PA-C had 452 Medicare Part D claims for 164 beneficiaries; the average among physician assistant prescribers was 830. 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.