William Shaffer, MD
NPI 1073548459 · Internal Medicine Physician · Bloomington, MN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Shaffer, MD is a Internal Medicine Physician provider in Bloomington, MN (NPI 1073548459).
Provider details
- NPI number
- 1073548459
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 30779 (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
19 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
716 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 117 | $9 |
| Blood Test, Basic Group of Blood Chemicals (calcium, Total)80048 | 88 | $8 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 81 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 80 | $125 |
| Liver Enzyme (sgpt), Level84460 | 55 | $5 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 42 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 72 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 402 | 146 |
| Amlodipine Besylate | 219 | 81 |
| Metoprolol Succinate | 167 | 62 |
| Levothyroxine Sodium | 163 | 56 |
| Omeprazole | 161 | 62 |
| Lisinopril | 150 | 53 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-12
- Last updated
- 2021-03-11
- Certified
- 2021-03-11
Frequently asked questions
- What is William Shaffer's NPI number?
- William Shaffer's National Provider Identifier (NPI) is 1073548459, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Shaffer's specialty?
- William Shaffer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Shaffer located?
- William Shaffer's practice location on file with NPPES is 7920 Old Cedar Ave S, Bloomington, MN 55425-1207.
- What is William Shaffer's phone number?
- The practice phone number listed in the NPPES registry for William Shaffer is (952) 428-1800.
- Does William Shaffer accept Medicare?
- William Shaffer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Shaffer's NPI active?
- Yes — William Shaffer's NPI (1073548459) is active in the NPPES registry as of the last update on 2021-03-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.