William Farrar, M.D.
NPI 1942263108 · Gastroenterology Physician · Red Wing, MN
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Farrar, M.D. is a Gastroenterology Physician provider in Red Wing, MN (NPI 1942263108).
Provider details
- NPI number
- 1942263108
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 43646 (MN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
315 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 137 | $230 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 51 | $103 |
| Balloon Dilation of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope, Less Than 3.0 Cm43249 | 27 | $132 |
| Diagnostic Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43235 | 25 | $89 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 22 | $121 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 71 | 31 |
| Budesonidebrand: Budesonide Dr | 36 | 12 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 26 | 26 |
| Diphenoxylate Hcl/Atropinebrand: Diphenoxylate-Atropine | 19 | — |
| Ondansetronbrand: Ondansetron Odt | 19 | — |
| Entecavir | 18 | — |
| Prednisone |
Practice location
Mailing address
Additional practice locations (1)
- 200 1st St SwRochester, MN 55905-0001Phone: (507) 284-2511
Registry dates
- Enumerated
- 2006-04-10
- Last updated
- 2020-09-29
- Certified
- 2020-09-29
Frequently asked questions
- What is William Farrar's NPI number?
- William Farrar's National Provider Identifier (NPI) is 1942263108, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Farrar's specialty?
- William Farrar is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is William Farrar located?
- William Farrar's practice location on file with NPPES is 701 Hewitt Blvd, Red Wing, MN 55066-2848.
- What is William Farrar's phone number?
- The practice phone number listed in the NPPES registry for William Farrar is (651) 267-5000.
- Does William Farrar accept Medicare?
- William Farrar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Farrar's NPI active?
- Yes — William Farrar's NPI (1942263108) is active in the NPPES registry as of the last update on 2020-09-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.