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DR. TOMMY HO-YIN CHEN M.D.
NPI 1326136854
Dermatology in Pasadena, CA

Active since October 10, 2006PECOS EnrolledAccepts Medicare Assignment
50 BELLEFONTAINE ST, #301, PASADENA, CA 91105(626) 793-4857(626) 793-8812 Get Directions Write a Review

NPPES record last updated: April 24, 2008. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Tommy Ho-yin Chen M.d. NPPES

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

DR. TOMMY HO-YIN CHEN M.D. (NPI 1326136854) is an individual dermatology provider in Pasadena, California, licensed in California (C37340) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Emory University School Of Medicine (1974).

NPPES Registry Identity

NPI1326136854
Entity TypeIndividualMale
Primary Taxonomy207N00000X
Provider Legal NameDR. TOMMY HO-YIN CHENCredential: M.D.
Location Address50 BELLEFONTAINE ST, #301Pasadena, CA 91105-3132
Mailing Address50 Bellefontaine St, #301Pasadena, CA 91105-3132 · (626) 793-4857 · Fax (626) 793-8812
Phone(626) 793-4857
Fax(626) 793-8812
Sole ProprietorNo
Medical School CMSEmory University School Of MedicineGraduated 1974
Enumeration DateOctober 10, 2006
Last NPPES UpdateApril 24, 2008
✔ NPI 1326136854 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
License✔ Licensed in CA · C37340
Definition
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
50 BELLEFONTAINE ST, Pasadena, CA 91105
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Other Identifiers 4

Medicaid00C373400CA
Medicare PINC37340ACA
Medicare UPINA36582CA
Medicare PINC37340CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Tommy Ho-yin Chen 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 ID345302790
PECOS Enrollment IDI20081219000184
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.

Areas of Expertise CMS Part B claims 9

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 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.
200 services107 patients
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.
66 services47 patients
Destruction of precancer skin growth, 15 or more growths 17004
This procedure involves removing 15 or more precancerous skin growths to prevent them from developing into cancer. It's done using various methods like freezing, creams, or minor surgery. The goal is to protect your health by stopping cancer before it starts.
65 services32 patients
Destruction of skin growth, 1-14 growths 17110
"Destruction of skin growth" refers to a procedure where 1-14 abnormal skin growths are removed. This is done using methods such as freezing, burning, or laser therapy. It helps prevent the growth from causing discomfort or turning into a more serious condition.
45 services37 patients
Biopsy of related skin growth, first growth 11102
A biopsy of a skin growth involves taking a small sample of the growth to examine it under a microscope. This helps determine if the growth is harmful. The procedure is typically quick, with minimal discomfort. It's a crucial step in ensuring your skin's health.
43 services31 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
33 services33 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91105 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
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
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.

FAIRMONT PHARMACY LLC
Pharmacy (Community/Retail Pharmacy)
50 BELLEFONTAINE ST, STE 103
PASADENA, CA 91105
Los Angeles County (626) 793-1188
LORI J. WYNSTOCK, M.D.
Internal Medicine
50 BELLEFONTAINE ST, #203
PASADENA, CA 91105
Los Angeles County (626) 793-6113
RALPH B. MARTIN, M.D., INC.
Internal Medicine
50 BELLEFONTAINE ST, SUITE 205
PASADENA, CA 91105
Los Angeles County (626) 792-4115
CHANG ZAIFMAN DENTAL INC
Dentist
50 BELLEFONTAINE ST, SUITE 102
PASADENA, CA 91105
Los Angeles County (626) 795-8326
MODERN CONCEPTS MEDICAL GROUP
Family Medicine
50 BELLEFONTAINE ST, 404
PASADENA, CA 91105
Los Angeles County (323) 728-6070
ROBERT D LOITZ MD
Pediatrics (Pediatric Cardiology)
50 BELLEFONTAINE ST, SUITE 405
PASADENA, CA 91105
Los Angeles County (626) 796-9259
DR. GERILYNN GUNSALUS OKAMOTO DDS
Dentist
50 BELLEFONTAINE ST, STE 204
PASADENA, CA 91105
Los Angeles County (626) 440-9095
ELIZABETH R DEOLIVEIRA MD
Pediatrics (Pediatric Cardiology)
50 BELLEFONTAINE ST, STE 405
PASADENA, CA 91105
Los Angeles County (626) 796-9259

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 Tommy Chen's NPI number?

The NPI number for Tommy Chen is 1326136854. It was assigned to this individual provider in the NPPES registry on October 10, 2006.

Where is Tommy Chen located?

Tommy Chen practices at 50 Bellefontaine St #301, Pasadena, CA 91105. The listed phone number is (626) 793-4857.

What is Tommy Chen's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Is Tommy Chen enrolled in Medicare?

Yes. Tommy Chen 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.

When was this NPI record last updated?

The NPPES record for Tommy Chen was last updated on April 24, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.