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JOHN TAYEK M.D.
NPI 1649389644
Internal Medicine - Endocrinology, Diabetes & Metabolism in Torrance, CA

Active since August 30, 2006PECOS EnrolledAccepts Medicare Assignment
21840 NORMANDIE AVE, TORRANCE, CA 90502(310) 222-5101(310) 320-5463 Get Directions Write a Review

NPPES record last updated: July 9, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About John Tayek M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN TAYEK M.D. (NPI 1649389644) is an individual endocrinology, diabetes & metabolism provider in Torrance, California, licensed in California (G45140) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Wayne State University School Of Medicine (1980).

NPPES Registry Identity

NPI1649389644
Entity TypeIndividualMale
Primary Taxonomy207RE0101X
Provider Legal NameJOHN TAYEKCredential: M.D.
Location Address21840 NORMANDIE AVETorrance, CA 90502-2047
Mailing Address21840 Normandie AveTorrance, CA 90502-2047 · (310) 222-5101 · Fax (310) 320-5463
Phone(310) 222-5101
Fax(310) 320-5463
Sole ProprietorNo
Medical School CMSWayne State University School Of MedicineGraduated 1980
Enumeration DateAugust 30, 2006
Last NPPES UpdateJuly 9, 2007
✔ NPI 1649389644 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in CA · G45140
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
21840 NORMANDIE AVE, Torrance, CA 90502
Open in Google Maps ↗

Other Identifiers 5

Medicare ID-Type UnspecifiedWG45140DCA · Ppin
Medicaid00G451400CA
Medicare UPINA49908CA
Medicare ID-Type UnspecifiedWG45140CCA · Ppin
Medicare ID-Type UnspecifiedWG45140ECA · Ppin

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

John Tayek M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8628257664
PECOS Enrollment IDI20110124000829
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show John Tayek reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

County Of Los Angeles
0.4 mi
General Acute Care Hospital
1000 W CARSON ST # 2
Torrance, CA 90502
  • Reassigned Medicare billing, California enrollment
  • 1,939 clinicians in this Medicare group
NPI 1851363188 (310) 222-2171

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90502 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
7 suppliers24 claims64 services$4.94 avg. paid by Medicare
Enteral feeding supply kit; syringe fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4034
Other-Enteral and Parenteral · category OB006N
1 supplier11 claims331 services$2.62 avg. paid by Medicare
Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152
Other-Enteral and Parenteral · category OB006N
1 supplier11 claims4,700 services$0.27 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KATAYOUN K MOSTAFAIE M.D.
General Practice
21840 NORMANDIE AVE, STE. 700
TORRANCE, CA 90502
Los Angeles County (310) 222-5101
ANDREW G GIANOUKAKIS M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
21840 NORMANDIE AVE, STE. 700
TORRANCE, CA 90502
Los Angeles County (310) 222-5183
KATHY E SIETSEMA M.D.
Internal Medicine (Pulmonary Disease)
21840 NORMANDIE AVE
TORRANCE, CA 90502
Los Angeles County (310) 222-5101
MARK T. MUNEKATA M.D.
General Practice
21840 NORMANDIE AVE, STE. 700
TORRANCE, CA 90502
Los Angeles County (310) 222-5101
JOEL D. KOPPLE M.D.
Internal Medicine (Nephrology)
21840 NORMANDIE AVE, STE. 700
TORRANCE, CA 90502
Los Angeles County (310) 222-5101
NEDILJKA BULJUBASIC M.D.
Internal Medicine (Cardiovascular Disease)
21840 NORMANDIE AVE, STE. 700
TORRANCE, CA 90502
Los Angeles County (310) 222-5101
CATHERINE S MAO M.D.
Pediatrics (Pediatric Endocrinology)
21840 NORMANDIE AVE, STE. 1100
TORRANCE, CA 90502
Los Angeles County (310) 222-5133
RONALD SWERDLOFF M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
21840 NORMANDIE AVE, STE. 700
TORRANCE, CA 90502
Los Angeles County (310) 222-5101

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Tayek's NPI number?

The NPI number for John Tayek is 1649389644. It was assigned to this individual provider in the NPPES registry on August 30, 2006.

Where is John Tayek located?

John Tayek practices at 21840 Normandie Ave, Torrance, CA 90502. The listed phone number is (310) 222-5101.

What is John Tayek's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is John Tayek enrolled in Medicare?

Yes. John Tayek is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for John Tayek's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Tayek reassigns Medicare benefits to County Of Los Angeles (Torrance, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Tayek's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for John Tayek was last updated on July 9, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.