William David Farrar, M.D.
Gastroenterology Physician · Red Wing, MN
William David Farrar, M.D. is a gastroenterology physician with a practice address in Red Wing, Minnesota, and NPI 1942263108, issued on Apr 10, 2006. Check the license (Minnesota 43646, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- William David Farrar
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 43646 MN
Self-reported in NPPES; status is on the state search - Practice location
- 701 Hewitt Blvd, Red Wing, MN 55066
- Phone
- (651) 267-5000
- Enumerated
- Apr 10, 2006
- Record last updated
- Sep 29, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20060525000149); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Denver, 1998
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 457 in Minnesota → Look up another NPI →
Also registered at 701 Hewitt Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kristin Ahdunko, PAPhysician Assistant1497724272
- Said Al Tawil, M.D.,Geriatric Medicine (Family Medicine) Physician1114290442
- Jack Alexander, MDInternal Medicine Physician1952376014
- Jennifer Bailey, PHDClinical Psychologist1114448156
- Christopher Ball, CRNACertified Registered Nurse Anesthetist1467408625
Verify William David Farrar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 43646Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average gastroenterology physician in 2024
423 Medicare Part D claims for 148 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 12 claims were for opioids.
Most prescribed
- Omeprazole71 claims
- Budesonide Dr36 claims
- Peg-3350 And Electrolytes26 claims
- Diphenoxylate-Atropine19 claims
- Ondansetron Odt19 claims
- Entecavir18 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
- Mayo Clinic Health System-Southeast Minnesota RegionAlbert Lea, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William David Farrar among 457 gastroenterology physician records in Minnesota
William David Farrar, M.D. is one of 457 gastroenterology physician records with a practice address in Minnesota. 81% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1998 · median 2006 among the 334 with a school on file
- Record last updated2020 · 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 207RG0100X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Minnesota
There are 457 gastroenterology physician records in Minnesota.
All 457 in Minnesota → Every provider in Red Wing → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Martin Gadek, MDNorthfield, MN 550571528021847
- Gregory Dean, MDLakeville, MN 550441922501725
- Jake JasurdaLakeville, MN 550441578096350
- Michael Kalinowski, D.O.Lakeville, MN 550441679008692
- Christina Pieper-Bigelow, MDHastings, MN 550331942260542
- Roger Gebhard, MDSaint Paul, MN 551011326014564
- Irshad Jafri, MDSt Paul, MN 551011255308243
- Susan LouSaint Paul, MN 551011316387277
Common questions
What is William David Farrar, M.D.'s NPI number?
William David Farrar, M.D.'s National Provider Identifier (NPI) is 1942263108, issued on Apr 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William David Farrar, M.D. located?
The NPPES record lists a practice address at 701 Hewitt Blvd, Red Wing, MN, 55066. Phone: (651) 267-5000. Providers update this record themselves, so call before visiting.
How can I verify William David Farrar, M.D.'s license?
NPPES lists Minnesota license number 43646, as entered by the provider. Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William David Farrar, M.D. prescribe under Medicare Part D?
In 2024, William David Farrar, M.D. had 423 Medicare Part D claims for 148 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.