William Baer, M.D.
NPI 1184731333 · Internal Medicine Physician · Grand Rapids, MI
William Baer, M.D. is a Internal Medicine Physician provider in Grand Rapids, MI (NPI 1184731333).
Provider details
- NPI number
- 1184731333
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301065896 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 86 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 189 | 58 |
| Levothyroxine Sodium | 183 | 44 |
| Atorvastatin Calcium | 147 | 41 |
| Trazodone Hcl | 111 | 33 |
| Amlodipine Besylate | 107 | 31 |
| Pantoprazole Sodium | 71 | 19 |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$448 across 42 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-24
- Last updated
- 2021-12-02
- Certified
- 2021-12-02
Frequently asked questions
- What is William Baer's NPI number?
- William Baer's National Provider Identifier (NPI) is 1184731333, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Baer's specialty?
- William Baer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Baer located?
- William Baer's practice location on file with NPPES is 260 Jefferson Ave Se, Grand Rapids, MI 49503-4597.
- What is William Baer's phone number?
- The practice phone number listed in the NPPES registry for William Baer is (616) 685-3100.
- Is William Baer's NPI active?
- Yes — William Baer's NPI (1184731333) is active in the NPPES registry as of the last update on 2021-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.