DR. AGNIESZKA M JANISIEWICZ M.D.
NPI 1467615104
Otolaryngology in San Leandro, CA

Q: What is Agnieszka Janisiewicz's NPI number?

The NPI number for Agnieszka Janisiewicz is 1467615104. It was assigned to this individual provider in the NPPES registry on July 2, 2008. The provider is also known as Dr. Agnieszka Marzena Janisiewicz MD.

Q: What is Agnieszka Janisiewicz's specialty?

The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.

Active since July 02, 2008PECOS EnrolledAccepts Medicare Assignment

2500 MERCED ST, SAN LEANDRO, CA 94577(510) 454-1000 Get Directions Write a Review

NPPES record last updated: February 11, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Dr. Agnieszka M Janisiewicz M.d. NPPES

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

DR. AGNIESZKA M JANISIEWICZ M.D. (NPI 1467615104) is an individual otolaryngology provider in San Leandro, California, licensed in California (A108890) and active in the NPI registry since July 2008. She is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (2008).

NPPES Registry Identity

NPI1467615104

Entity TypeIndividualFemale

Primary Taxonomy207Y00000X

Provider Legal NameDR. AGNIESZKA M JANISIEWICZCredential: M.D.

Location Address2500 MERCED STSan Leandro, CA 94577-4201

Mailing Address2500 Merced StSan Leandro, CA 94577-4201 · (510) 454-1000

Phone(510) 454-1000

Sole ProprietorYes

Medical School CMSHarvard Medical SchoolGraduated 2008

Enumeration DateJuly 2, 2008

Last NPPES UpdateFebruary 11, 2022

✔ NPI 1467615104 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOtolaryngologyAllopathic & Osteopathic Physicians

Taxonomy Code207Y00000X

License✔ Licensed in CA · A108890

Definition

An otolaryngologist-head and neck surgeon provides comprehensive medical and surgical care for patients with diseases and disorders that affect the ears, nose, throat, the respiratory and upper alimentary systems and related structures of the head and neck. An otolaryngologist diagnoses and provides medical and/or surgical therapy or prevention of diseases, allergies, neoplasms, deformities, disorders and/or injuries of the ears, nose, sinuses, throat, respiratory and upper alimentary systems, face, jaws and the other head and neck systems. Head and neck oncology, facial plastic and reconstructive surgery and the treatment of disorders of hearing and voice are fundamental areas of expertise.

2500 MERCED ST, San Leandro, CA 94577

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Other Names 1

Professional Name (2)Dr. Agnieszka Marzena Janisiewicz Md

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

Dr. Agnieszka M Janisiewicz 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 ID8820225758

PECOS Enrollment IDI20131220000554

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 Agnieszka Janisiewicz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc

15 mi

Internal Medicine

1190 VETERANS BLVD
Redwood City, CA 94063

Reassigned Medicare billing, California enrollment
20,078 clinicians in this Medicare group

NPI 1639252604 (650) 299-2000

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 94577 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

$153.83 typical visit price

range $69.00 – $202.35

Typical copayment $38.45 (range $17.25 – $50.58)

Most-billed visit code 99204

Established Patient

$84.91 typical visit price

range $23.44 – $166.46

Typical copayment $21.22 (range $5.86 – $41.61)

Most-billed visit code 99213

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 20

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

DR. SHIENA SHARMA MD

Anesthesiology