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DR. JANUSZ J MADEJ M.D.
NPI 1376616706
Internal Medicine in Los Altos, CA

Active since November 15, 2006Opted out of Medicare · through Jan 1, 2028
339 S SAN ANTONIO RD STE 1A, LOS ALTOS, CA 94022(650) 529-1669(650) 529-1670 Get Directions Write a Review

NPPES record last updated: March 30, 2024. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Janusz J Madej M.d. NPPES

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

DR. JANUSZ J MADEJ M.D. (NPI 1376616706) is an individual internal medicine provider in Los Altos, California, licensed in California (A69531) and active in the NPI registry since November 2006. He has opted out of Medicare through January 1, 2028 and remains eligible to order and refer and maintains a secondary practice location in Portola Valley.

NPPES Registry Identity

NPI1376616706
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. JANUSZ J MADEJCredential: M.D.
Location Address339 S SAN ANTONIO RD STE 1ALos Altos, CA 94022-3699
Mailing Address339 S San Antonio Rd Ste 1aLos Altos, CA 94022-3699 · (650) 529-1669 · Fax (650) 529-1670
Phone(650) 529-1669
Fax(650) 529-1670
Sole ProprietorYes
Enumeration DateNovember 15, 2006
Last NPPES UpdateMarch 30, 2024
NPPES CertifiedMarch 30, 2024
✔ NPI 1376616706 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A69531
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
339 S SAN ANTONIO RD STE 1A, Los Altos, CA 94022
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Other Names 1

Professional Name (2)Dr. John Madej M.d.

Secondary Practice Location 1

Location 13130 ALPINE RD., STE 180PORTOLA VALLEY, CA 94028 · Phone (650) 529-1669 · Fax (650) 529-1670

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Janusz J Madej M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from January 1, 2024 through January 1, 2028.

Opt-Out Effective DateJanuary 1, 2024
Opt-Out In Effect ThroughJanuary 1, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94022 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
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
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.

Other Providers at the Same Location NPPES

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

JESSICA MADEJ MD
Internal Medicine
339 S SAN ANTONIO RD STE 1A
LOS ALTOS, CA 94022
Santa Clara County (650) 529-1669

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 Janusz Madej's NPI number?

The NPI number for Janusz Madej is 1376616706. It was assigned to this individual provider in the NPPES registry on November 15, 2006. The provider is also known as Dr. John Madej M.D..

Where is Janusz Madej located?

Janusz Madej practices at 339 S San Antonio Rd Ste 1A, Los Altos, CA 94022. The listed phone number is (650) 529-1669.

What is Janusz Madej's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Janusz Madej enrolled in Medicare?

No. Janusz Madej has opted out of Medicare through January 1, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Janusz Madej was last updated on March 30, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.