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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. TOM Y YI D.O.
NPI 1336198514
Family Medicine in Pasadena, CA

Active since May 08, 2006PECOS EnrolledCLIA 05D1061816 · Waiver
65 N MADISON AVE STE 612, PASADENA, CA 91101(626) 449-9800(626) 449-3939 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 13, 2026, Mar 31, 2026 (2 updates tracked since 2026).

About Dr. Tom Y Yi D.o. NPPES

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

DR. TOM Y YI D.O. (NPI 1336198514) is an individual family medicine provider in Pasadena, California, licensed in California (20A8711) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through November 27, 2026, and is a graduate of Other (1999).

NPPES Registry Identity

NPI1336198514
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. TOM Y YICredential: D.O.
Location Address65 N MADISON AVE STE 612Pasadena, CA 91101-5243
Mailing Address65 N Madison Ave Ste 612Pasadena, CA 91101-5243 · (626) 449-9800 · Fax (626) 449-3939
Phone(626) 449-9800
Fax(626) 449-3939
Sole ProprietorNo
Medical School CMSOtherGraduated 1999
Enumeration DateMay 8, 2006
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
NPPES CertifiedMarch 31, 2026
✔ NPI 1336198514 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · 20A8711
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
65 N MADISON AVE STE 612, Pasadena, CA 91101
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Tom Y Yi D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5092762120
PECOS Enrollment IDI20050331001120
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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 05D1061816

Tom Yi Do · Pasadena, CA
Active · expires Nov 27, 2026
CLIA Number05D1061816
Laboratory TypePhysician Office
Certificate Effective DateNovember 28, 2024
Certificate Expiration DateNovember 27, 2026
Laboratory DirectorTom Y. Yi
Laboratory Phone(626) 449-9800
Laboratory LocationTom Yi Do65 N Madison Ave Ste 612, Pasadena, CA 91101
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
67 services30 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
36 services19 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91101 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
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.

Other Providers at the Same Location NPPES

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

TOM YI DO A PROFESSIONAL CORPORTATION
Family Medicine
65 N MADISON AVE STE 612
PASADENA, CA 91101
Los Angeles County (626) 449-9800

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 Tom Yi's NPI number?

The NPI number for Tom Yi is 1336198514. It was assigned to this individual provider in the NPPES registry on May 8, 2006.

Where is Tom Yi located?

Tom Yi practices at 65 N Madison Ave Ste 612, Pasadena, CA 91101. The listed phone number is (626) 449-9800.

What is Tom Yi's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Tom Yi enrolled in Medicare?

Yes. Tom Yi is registered in the Medicare PECOS enrollment system.

Does Tom Yi hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D1061816) is associated with this NPI, valid through November 27, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Tom Yi was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 days 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.