Dr. William David Farrar, MD
- Medicare services, 2024
- 315
- Medicare patients, 2024
- 295
- Part D claims, 2024
- 423
- Hospital affiliations
- 4
- Medical groups
- 3
- Practice address
- 701 Hewitt Blvd, Red Wing, MN 55066
- Practice phone
- Call (651) 267-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mayo Clinic Health System - Red Wing
Red Wing, Minnesota
Find Dr. Farrar's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William David Farrar is a gastroenterologist in Red Wing, Minnesota
Dr. Farrar practices at Mayo Clinic Health System - Red Wing in Red Wing, Minnesota.
Dr. Farrar's NPI, 1942263108, was assigned on April 10, 2006. Dr. Farrar graduated from University of Colorado School of Medicine, Denver in 1998. Dr. Farrar holds Minnesota license 43646.
- NPI
- 1942263108NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668483991
- NPI enumeration date
- April 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (651) 267-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William David Farrar practices at Mayo Clinic Health System - Red Wing in Red Wing, Minnesota
Dr. Farrar's primary practice is Mayo Clinic Health System - Red Wing, at 701 Hewitt Blvd, Red Wing, MN 55066 in Goodhue County. The practice phone is (651) 267-5000.
- Mayo Clinic Health System - Red Wing701 Hewitt Blvd, Red Wing, MN 55066 · Goodhue CountyPhone(651) 267-5000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William David Farrar is affiliated with 5 sites of care and 3 medical groups
Dr. Farrar's primary practice is Mayo Clinic Health System - Red Wing in Red Wing, Minnesota. Dr. Farrar is also affiliated with Mayo Clinic Health System in Red Wing. The medical group on file is Mayo Clinic. Dmand AI also links Dr. Farrar to 3 more hospitals and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William David Farrar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Farrar practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mayo Clinic Health System - Red Wing | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William David Farrar is one of 366 gastroenterologists in Minnesota
Gastroenterology is Dr. Farrar's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Farrar is licensed in Minnesota.
Specialties and state licenses
- Gastroenterology, MinnesotaPrimary
Gastroenterologists near Dr. Farrar
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William David Farrar billed Medicare for 315 services in 2024
CMS data shows 315 Medicare services from Dr. Farrar across 8 procedure codes in 2024, for 295 Medicare patients. Medicare paid $45,461 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Farrar's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 2312024: 27619%
- Other services
- 2023: 462024: 3915%
- Office and hospital visits
- 2023: 662024: 0100%
Dr. Farrar compared with the Minnesota median for gastroenterologists, 2024
- Dr. Farrar
- Minnesota median
- Medicare services
- 315vs 27415% above
- Medicare patients
- 295vs 19849% above
- Part D claims
- 297vs 1422.1 times
Medians across 380 gastroenterologists in Minnesota with Dmand AI profiles that report each measure.
Dr. Farrar's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Farrar and other gastroenterologists in Minnesota.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William David Farrar treated 295 Medicare patients in 2024, average age 72
CMS counts 295 Medicare patients who saw Dr. Farrar in 2024. The largest group is 65 to 74, with 157 patients. 65% of them have high blood pressure, and 61% have high cholesterol. 14% are also on Medicaid. Their average risk score is 1.19, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Farrar's median patient age at 70, with 53% women.
Dr. Farrar's Medicare patients by age, 2024
Dr. Farrar's Medicare patients by sex, 2024
- Women15352%
- Men14248%
Chronic conditions among Dr. Farrar's Medicare patients, 2024
- High blood pressure65%
- High cholesterol61%
- Arthritis38%
- Mood disorders31%
- Depression28%
- Chronic kidney disease23%
- Diabetes22%
- Ischemic heart disease21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Farrar's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William David Farrar wrote 423 Medicare Part D claims in 2024
In 2024, Dr. Farrar wrote 423 Medicare Part D claims for 148 patients. 86% of them were for generic drugs. CMS names the drug for 297 of them, across 14 drugs with 11 or more claims each, at $66,841 in total drug cost. In 2023, CMS named 323 claims across 16 drugs.
Dr. Farrar's Part D claims by kind of drug, 2024
- Generic362 claims86%
- Brand-name61 claims14%
Dr. Farrar's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Farrar's Part D claims, 2024
- Opioids3%12 of 423 claims
- Antibiotics8%33 of 423 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3232024: 2978%
Drugs named by CMS: 14 in 2024, 16 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. William David Farrar ranks in the 86th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Farrar accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 155 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Farrar, more than 86% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Farrar ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 86th percentile155 procedures
- Colonoscopy
- 81st percentile106 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. William David Farrar graduated from University of Colorado School of Medicine, Denver
Dr. Farrar graduated from University of Colorado School of Medicine, Denver in 1998.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William David Farrar's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William David Farrar
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William David Farrar's NPI number?
Dr. William David Farrar's NPI number is 1942263108. It was assigned on April 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William David Farrar?
Dr. William David Farrar is a gastroenterologist in Red Wing, Minnesota. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. William David Farrar practice?
Dr. Farrar practices at 701 Hewitt Blvd, Red Wing, MN 55066. Dr. Farrar's primary practice is Mayo Clinic Health System - Red Wing in Red Wing, Minnesota. Dmand AI also links Dr. Farrar to 3 hospitals and 2 medical groups.
What is Dr. William David Farrar's office phone number?
The practice phone on file for Dr. Farrar is (651) 267-5000.
What is Dr. William David Farrar's medical license number?
Dr. Farrar holds Minnesota license 43646.
Which hospitals is Dr. William David Farrar affiliated with?
Dr. Farrar is affiliated with Mayo Clinic Health System in Red Wing. Dmand AI links Dr. Farrar to 3 more hospitals.
What medical group is Dr. William David Farrar part of?
Dr. Farrar is linked to Mayo Clinic. Dmand AI links Dr. Farrar to 2 more medical groups.
Does Dr. William David Farrar accept Medicare?
Yes. CMS data shows Dr. Farrar billed Medicare for 315 services in 2024, and Dr. Farrar accepts Medicare assignment.
How many Medicare patients does Dr. William David Farrar see?
CMS counts 295 Medicare patients who saw Dr. Farrar in 2024, with an average age of 72.
What services does Dr. William David Farrar bill to Medicare?
In 2024, Dr. Farrar's most billed Medicare services were surgery: digestive system (45385), surgery: digestive system (43239) and surgery: digestive system (43249).
Show 3 more questionsShow fewer questions
Where did Dr. William David Farrar go to medical school?
Dr. Farrar graduated from University of Colorado School of Medicine, Denver in 1998.
What drugs does Dr. William David Farrar prescribe most?
In 2024 Medicare Part D data, Dr. Farrar's most prescribed drugs by claims were Omeprazole, Budesonide DR and Peg-3350 And Electrolytes.
How long has Dr. William David Farrar been practicing?
Dr. Farrar graduated from medical school in 1998, 28 years ago.
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