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YI-JEN FONG MD
NPI 1841558103
Internal Medicine in Campbell, CA

Active since April 24, 2012PECOS EnrolledAccepts Medicare Assignment
220 E HACIENDA AVE, CAMPBELL, CA 95008(408) 871-6500 Get Directions Write a Review

NPPES record last updated: August 5, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 5, 2024, Sep 27, 2022, Dec 20, 2021 (3 updates tracked since 2021).

About Yi-jen Fong Md NPPES

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

YI-JEN FONG MD (NPI 1841558103) is an individual internal medicine provider in Campbell, California, licensed in California (A124113) and active in the NPI registry since April 2012. He is enrolled in Medicare PECOS and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (2011).

NPPES Registry Identity

NPI1841558103
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameYI-JEN FONGCredential: MD
Location Address220 E HACIENDA AVECampbell, CA 95008-6617
Mailing Address775 Fern RdgFelton, CA 95018-9028 · (310) 339-8534
Phone(408) 871-6500
Sole ProprietorYes
Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 2011
Enumeration DateApril 24, 2012
Last NPPES UpdateAugust 5, 20243 updates tracked since enumeration
NPPES CertifiedAugust 4, 2024
✔ NPI 1841558103 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 · A124113
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.
220 E HACIENDA AVE, Campbell, CA 95008
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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

Yi-jen Fong Md 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 ID4688801285
PECOS Enrollment IDI20141103002416
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 Reassignments

2

Medicare enrollment records show Yi-jen Fong reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Permanente Medical Group Inc
5.2 mi
Internal Medicine
710 LAWRENCE EXPRESSWAY
Santa Clara, CA 95051
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1073606299 (408) 851-1000
Healthtap Medical Group, P.C.
16 mi
General Practice
4370 ALPINE ROAD, STE 206
Portola Valley, CA 94028
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Healthtap Medical Group PC
  • 8 clinicians in this Medicare group
NPI 1518330539 (650) 268-9806

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 95008 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 20

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

SUVARCHALA SURYA RAMA KOMPELLA
Internal Medicine
220 E HACIENDA AVE
CAMPBELL, CA 95008
Santa Clara County (408) 368-7660
QIONGQIONG YANG MD
Family Medicine
220 E HACIENDA AVE
CAMPBELL, CA 95008
Santa Clara County (408) 871-6500
BO KIM
Pharmacist
220 E HACIENDA AVE
CAMPBELL, CA 95008
Santa Clara County (408) 871-6339
JENNIFER L RAGAZZO MD
Obstetrics & Gynecology
220 E HACIENDA AVE
CAMPBELL, CA 95008
Santa Clara County (408) 871-6419
JANETTA GERINGSON MD
Psychiatry & Neurology (Psychiatry)
220 E HACIENDA AVE
CAMPBELL, CA 95008
Santa Clara County (408) 236-6400
PHILIP S. CREGER MD
Internal Medicine
220 E HACIENDA AVE
CAMPBELL, CA 95008
Santa Clara County (408) 236-6400
DR. ALLISON STILPHEN WEBB-PEREZ MD
Student in an Organized Health Care Education/Training Program
220 E HACIENDA AVE
CAMPBELL, CA 95008
Santa Clara County (408) 871-6421
MS. LIGAYA AYN YRASTORZA MSPT
Physical Therapist (Orthopedic)
220 E HACIENDA AVE
CAMPBELL, CA 95008
Santa Clara County (408) 871-6114

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 Yi-jen Fong's NPI number?

The NPI number for Yi-jen Fong is 1841558103. It was assigned to this individual provider in the NPPES registry on April 24, 2012.

Where is Yi-jen Fong located?

Yi-jen Fong practices at 220 E Hacienda Ave, Campbell, CA 95008. The listed phone number is (408) 871-6500.

What is Yi-jen Fong's specialty?

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

Is Yi-jen Fong enrolled in Medicare?

Yes. Yi-jen Fong 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 organizations bill Medicare for Yi-jen Fong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Yi-jen Fong reassigns Medicare benefits to 2 organizations: Permanente Medical Group Inc (Santa Clara, CA) and Healthtap Medical Group, P.C. (Portola Valley, CA). Each 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 Yi-jen Fong'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 Yi-jen Fong was last updated on August 5, 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.