Corey J. Lager, MD
Endocrinology, Diabetes & Metabolism
Corey J. Lager, MD specializes in internal medicine, serving patients in Portage, MI in independent practice. A University of Michigan Medical School graduate since 2013, he brings 13+ years of experience. CMS Medicare data shows his patients commonly have high cholesterol, hypertension, and diabetes. CMS MIPS quality score: 84.89/100 (2023).
At a glance
- Federal MIPS score higher than 39% of MIPS-scored doctors in Michigan
- Virtual visits available — no app or travel required
Older · 894dNPPES updated 2023-11-27 · verify NPI on CMS · Verify license at Michigan Board of Medicine
How Does This Doctor Compare?
MIPS Score
202384.89/100
Michigan avg: 85.2 · US avg: 83.6
✓ Higher than most doctors nationally(+1.3 pts)
How the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Generic Rx
↑ Higher = better51%
Michigan avg: 83.5 · US avg: 82.8
⚠ Lower than most doctors nationally(-31.8 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
256
Unique beneficiaries
Standard volumePrescription Recipients
540
Patients prescribed
Prescriptions Written
3,416
Total claims
Total Medicare drug cost: $1.82M
Percentile rankings compared against 1,194 reporting peers in Michigan.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages High Cholesterol, Hypertension, and Diabetes.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-2%) — less common here
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↑ More patients than average (+14%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-5%) — less common here
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↑ More patients than average (+6%) — a focus area for this doctor
Conditions affecting emotional state, including depression and bipolar disorder
Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-6%) — less common here
Weakened bones that are more prone to fractures, common in older adults
US avg: 18.1%↑ More patients than average (+9%) — a focus area for this doctor
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$396 received from industry
26 transactions reported in 2024 ·Low tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Corey J. Lager's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 2013
University of Michigan Medical School
Board certified · Oct 4, 2020
Self-reported via NPPES
13 years in practice
Established
Endocrinologists treat hormonal and metabolic disorders including diabetes (type 1 and 2), thyroid disease, osteoporosis, adrenal disorders, pituitary conditions, and polycystic ovary syndrome (PCOS).
Taxonomy: 207RE0101X
Education & Training
University of Michigan Medical School (Class of 2013)
Mailing address
601 John St Box 39, Kalamazoo, MI 49007-5341
Differs from practice location
Virtual Endocrinology, Diabetes & Metabolism Care With Corey J. Lager
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Corey J. Lager for cholesterol management, blood pressure monitoring, diabetes check-ins — no travel to Portage required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Corey J. Lager
Dr. Lager is listed as active in the NPI registry with telehealth listed in Portage, MI. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (269) 341-8585.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.
Contact Corey J. Lager
Practice Location
7901 S 12th St Ste 200, Portage, MI 49024-3831
Mailing Address
601 John St Box 39, Kalamazoo, MI 49007-5341
This is a provider directory. Contact the office directly to schedule appointments.
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