Corey Lager, MD
NPI 1295171189 · Endocrinology, Diabetes & Metabolism Physician · Portage, MI
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Corey Lager, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Portage, MI (NPI 1295171189).
Provider details
- NPI number
- 1295171189
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4301102688 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
549 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 254 | $94 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 118 | $33 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 62 | $129 |
| Ultrasound Scan of Head and Neck Soft Tissue76536 | 35 | $26 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 33 | $139 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 66 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 774 | 214 |
| Methimazole | 209 | 70 |
| Tirzepatidebrand: Mounjaro | 183 | 33 |
| Semaglutidebrand: Ozempic | 119 | 32 |
| Metformin Hcl | 119 | 38 |
| Hydrocortisone | 115 | 37 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$396 across 26 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
Additional practice locations (1)
- 24 Frank Lloyd Wright DriveDomino'S Farms, Lobby G, Suite 1500Ann Arbor, MI 48106Phone: (734) 647-5871
Registry dates
- Enumerated
- 2013-05-17
- Last updated
- 2023-11-27
- Certified
- 2020-10-05
Frequently asked questions
- What is Corey Lager's NPI number?
- Corey Lager's National Provider Identifier (NPI) is 1295171189, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Corey Lager's specialty?
- Corey Lager is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Corey Lager located?
- Corey Lager's practice location on file with NPPES is 7901 S 12th St Ste 200, Portage, MI 49024-3831.
- What is Corey Lager's phone number?
- The practice phone number listed in the NPPES registry for Corey Lager is (269) 341-8585.
- Does Corey Lager accept Medicare?
- Corey Lager is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Corey Lager's NPI active?
- Yes — Corey Lager's NPI (1295171189) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.