Glenn Legler, M.D.
NPI 1578540886 · Internal Medicine Physician · Mahopac, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Glenn Legler, M.D. is a Internal Medicine Physician provider in Mahopac, NY (NPI 1578540886).
Provider details
- NPI number
- 1578540886
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 175127 (NY)
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
20 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
7,389 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 | 852 | $136 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 790 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 616 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 547 | $13 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 491 | $17 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 90 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 406 | 117 |
| Rosuvastatin Calcium | 341 | 109 |
| Amlodipine Besylate | 314 | 105 |
| Losartan Potassium | 208 | 63 |
| Levothyroxine Sodium | 199 | 64 |
| Metoprolol Succinate | 168 | 48 |
| Simvastatin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$773 across 36 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)
- 111 Clock Tower CmnsBrewster, NY 10509-4055Phone: (845) 279-5187Fax: (855) 703-7570
Registry dates
- Enumerated
- 2005-12-28
- Last updated
- 2026-01-28
- Certified
- 2026-01-28
Frequently asked questions
- What is Glenn Legler's NPI number?
- Glenn Legler's National Provider Identifier (NPI) is 1578540886, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Glenn Legler's specialty?
- Glenn Legler is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Glenn Legler located?
- Glenn Legler's practice location on file with NPPES is 888 Route 6, Mahopac, NY 10541-6201.
- What is Glenn Legler's phone number?
- The practice phone number listed in the NPPES registry for Glenn Legler is (845) 628-1492.
- Does Glenn Legler accept Medicare?
- Glenn Legler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Glenn Legler's NPI active?
- Yes — Glenn Legler's NPI (1578540886) is active in the NPPES registry as of the last update on 2026-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.