Andrew Gregson
NPI 1538514518 · Internal Medicine Physician · Midland, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrew Gregson is a Internal Medicine Physician provider in Midland, MI (NPI 1538514518).
Provider details
- NPI number
- 1538514518
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 5101025095 (MI)
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
10 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
565 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 35 Minutes99232 | 346 | $80 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 92 | $115 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 57 | $130 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 43 | $173 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 27 | $120 |
Typical Medicare-allowed amounts for these services range $80–$173 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
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 |
|---|---|---|
| Prednisone | 29 | 29 |
| Pantoprazole Sodium | 25 | 20 |
| Bisoprolol Fumarate | 18 | 11 |
| Amlodipine Besylate | 17 | 13 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 16 | 15 |
| Apixabanbrand: Eliquis | 16 | 12 |
| Potassium Chloride |
Practice location
Mailing address
Additional practice locations (1)
- 1675 Leahy Street Suite 201aMuskegon, MI 49442Phone: (231) 672-6336Fax: (231) 672-7801
Registry dates
- Enumerated
- 2016-04-27
- Last updated
- 2023-06-20
- Certified
- 2023-06-20
Frequently asked questions
- What is Andrew Gregson's NPI number?
- Andrew Gregson's National Provider Identifier (NPI) is 1538514518, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrew Gregson's specialty?
- Andrew Gregson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Andrew Gregson located?
- Andrew Gregson's practice location on file with NPPES is 4000 Wellness Dr, Midland, MI 48670-2000.
- What is Andrew Gregson's phone number?
- The practice phone number listed in the NPPES registry for Andrew Gregson is (844) 832-1956.
- Does Andrew Gregson accept Medicare?
- Andrew Gregson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrew Gregson's NPI active?
- Yes — Andrew Gregson's NPI (1538514518) is active in the NPPES registry as of the last update on 2023-06-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.