John Tloczkowski, MD
NPI 1730402702 · Endocrinology, Diabetes & Metabolism Physician · Greenlawn, NY
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Tloczkowski, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Greenlawn, NY (NPI 1730402702).
Provider details
- NPI number
- 1730402702
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 257389 (NY)
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
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
11,211 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 2,252 | $145 |
| 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 | 1,776 | $18 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 1,564 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 1,291 | $10 |
| Hemoglobin A1c Level83036 | 1,027 | $10 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 72 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 856 | 254 |
| Tirzepatidebrand: Mounjaro | 645 | 128 |
| Levothyroxine Sodiumbrand: Synthroid | 507 | 140 |
| Metformin Hclbrand: Metformin Hcl Er | 441 | 135 |
| Semaglutidebrand: Ozempic | 406 | 106 |
| Metformin Hcl | 402 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-03-05
- Last updated
- 2023-12-07
- Certified
- 2023-12-07
Frequently asked questions
- What is John Tloczkowski's NPI number?
- John Tloczkowski's National Provider Identifier (NPI) is 1730402702, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Tloczkowski's specialty?
- John Tloczkowski is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is John Tloczkowski located?
- John Tloczkowski's practice location on file with NPPES is 5 Cuba Hill Rd, Greenlawn, NY 11740-1624.
- What is John Tloczkowski's phone number?
- The practice phone number listed in the NPPES registry for John Tloczkowski is (631) 628-5000.
- Does John Tloczkowski accept Medicare?
- John Tloczkowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Tloczkowski's NPI active?
- Yes — John Tloczkowski's NPI (1730402702) is active in the NPPES registry as of the last update on 2023-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.