1. Home
  2. Directory
  3. California
  4. Oakland
  5. Internal Medicine
  6. NPI Profile

SUSAN ELIZABETH FERNYAK MD
NPI 1679688014
Internal Medicine in Oakland, CA

Active since August 19, 2006PECOS Enrolled
2121 HARRISON ST STE 120, OAKLAND, CA 94612(510) 587-3000 Get Directions Write a Review

NPPES record last updated: August 9, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Susan Elizabeth Fernyak Md NPPES

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

SUSAN ELIZABETH FERNYAK MD (NPI 1679688014) is an individual internal medicine provider in Oakland, California, licensed in California (A52402) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1679688014
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameSUSAN ELIZABETH FERNYAKCredential: MD
Location Address2121 HARRISON ST STE 120Oakland, CA 94612-3788
Mailing Address2121 Harrison St Ste 120Oakland, CA 94612-3788 · (510) 587-3000
Phone(510) 587-3000
Sole ProprietorNo
Enumeration DateAugust 19, 2006
Last NPPES UpdateAugust 9, 2024
NPPES CertifiedAugust 9, 2024
✔ NPI 1679688014 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 · A52402
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.
2121 HARRISON ST STE 120, Oakland, CA 94612
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Susan Elizabeth Fernyak Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

County Of San Mateo
13 mi
Multi-Specialty
306 SPRUCE AVE
South San Francisco, CA 94080
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1831268580 (California)
  • 597 clinicians in this Medicare group
NPI 1609812148 (650) 573-2120

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 94612 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
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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 5

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

SONAM CHODON CHOEGYEL NP
Nurse Practitioner (Family)
2121 HARRISON ST STE 120
OAKLAND, CA 94612
Alameda County (510) 587-3000
MA BERNADETTE BELMI GARZA RN, FNP
Nurse Practitioner (Family)
2121 HARRISON ST STE 120
OAKLAND, CA 94612
Alameda County (510) 587-3000
ANDREA TELFER FNP-C
Nurse Practitioner (Family)
2121 HARRISON ST STE 120
OAKLAND, CA 94612
Alameda County (510) 587-3000
DR. ANNIE ROSE PEDLAR FNP, DNP
Nurse Practitioner (Family)
2121 HARRISON ST STE 120
OAKLAND, CA 94612
Alameda County (510) 587-3000
DR. MAGDALA D'AUTRUCHE DNP-FNP
Nurse Practitioner (Family)
2121 HARRISON ST STE 120
OAKLAND, CA 94612
Alameda County (510) 587-3000

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 Susan Fernyak's NPI number?

The NPI number for Susan Fernyak is 1679688014. It was assigned to this individual provider in the NPPES registry on August 19, 2006.

Where is Susan Fernyak located?

Susan Fernyak practices at 2121 Harrison St Ste 120, Oakland, CA 94612. The listed phone number is (510) 587-3000.

What is Susan Fernyak's specialty?

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

Is Susan Fernyak enrolled in Medicare?

Yes. Susan Fernyak is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Susan Fernyak's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Susan Fernyak reassigns Medicare benefits to County Of San Mateo (South San Francisco, 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 Susan Fernyak'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 Susan Fernyak was last updated on August 9, 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.