John Schaffner, M.D.
NPI 1235118639 · Gastroenterology Physician · Rochester, MN
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Schaffner, M.D. is a Gastroenterology Physician provider in Rochester, MN (NPI 1235118639).
Provider details
- NPI number
- 1235118639
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 41232 (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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
274 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 80 | $92 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 67 | $112 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 58 | $58 |
| Telephone, Internet, Or Electronic Health Record Assessment and Management With Written Report By Consulting Physician, at Least 5 Minutes99451 | 28 | $35 |
| New Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 15 Minutes Or More99202 | 26 | $74 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Loperamide Hclbrand: Loperamide | 35 | 15 |
| Dicyclomine Hcl | 33 | 18 |
| Doxycycline Monohydrate | 29 | 15 |
| Omeprazole | 29 | 16 |
| Pantoprazole Sodium | 24 | — |
| Famotidine | 21 | — |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 16 | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-13
- Last updated
- 2025-01-24
- Certified
- 2025-01-24
Frequently asked questions
- What is John Schaffner's NPI number?
- John Schaffner's National Provider Identifier (NPI) is 1235118639, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Schaffner's specialty?
- John Schaffner is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is John Schaffner located?
- John Schaffner's practice location on file with NPPES is 200 1st St Sw, Rochester, MN 55905-0001.
- What is John Schaffner's phone number?
- The practice phone number listed in the NPPES registry for John Schaffner is (507) 284-2511.
- Does John Schaffner accept Medicare?
- John Schaffner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Schaffner's NPI active?
- Yes — John Schaffner's NPI (1235118639) is active in the NPPES registry as of the last update on 2025-01-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.