Gregory Bismack, M.D.
NPI 1619293149 · Internal Medicine Physician · Effingham, IL
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Bismack, M.D. is a Internal Medicine Physician provider in Effingham, IL (NPI 1619293149).
Provider details
- NPI number
- 1619293149
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301097035 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 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
1,050 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 492 | $114 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 243 | $109 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 206 | $75 |
| Critical Care, First 30-74 Minutes99291 | 57 | $205 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 36 | $163 |
| Advance Care Planning, First 30 Minutes99497 | 16 | $73 |
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 |
|---|---|---|
| Apixabanbrand: Eliquis | 32 | 17 |
| Furosemide | 31 | 17 |
| Metoprolol Succinate | 30 | 18 |
| Atorvastatin Calcium | 30 | 16 |
| Prednisone | 25 | 25 |
| Amlodipine Besylate | 25 | 15 |
| Cephalexin | 20 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-04-08
- Last updated
- 2022-12-05
- Certified
- 2022-12-05
Frequently asked questions
- What is Gregory Bismack's NPI number?
- Gregory Bismack's National Provider Identifier (NPI) is 1619293149, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Bismack's specialty?
- Gregory Bismack is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Bismack located?
- Gregory Bismack's practice location on file with NPPES is 503 N Maple St, Effingham, IL 62401-2006.
- What is Gregory Bismack's phone number?
- The practice phone number listed in the NPPES registry for Gregory Bismack is (217) 342-2121.
- Does Gregory Bismack accept Medicare?
- Gregory Bismack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Bismack's NPI active?
- Yes — Gregory Bismack's NPI (1619293149) is active in the NPPES registry as of the last update on 2022-12-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.