John Tayek, M.D.
NPI 1649389644 · Endocrinology, Diabetes & Metabolism Physician · Torrance, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Tayek, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Torrance, CA (NPI 1649389644).
Provider details
- NPI number
- 1649389644
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G45140 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 161 | 58 |
| Empagliflozinbrand: Jardiance | 86 | 32 |
| Lisinopril | 65 | 27 |
| Rosuvastatin Calcium | 54 | 20 |
| Metformin Hcl | 51 | 21 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 51 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$15 across 1 record (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
Registry dates
- Enumerated
- 2006-08-30
- Last updated
- 2007-07-09
Frequently asked questions
- What is John Tayek's NPI number?
- John Tayek's National Provider Identifier (NPI) is 1649389644, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Tayek's specialty?
- John Tayek is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is John Tayek located?
- John Tayek's practice location on file with NPPES is 21840 Normandie Ave, Torrance, CA 90502-2047.
- What is John Tayek's phone number?
- The practice phone number listed in the NPPES registry for John Tayek is (310) 222-5101.
- Does John Tayek accept Medicare?
- John Tayek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Tayek's NPI active?
- Yes — John Tayek's NPI (1649389644) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.