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DR. ROBERT FAN YANG TZENG MD
NPI 1578665014
Internal Medicine in Monterey Park, CA

Active since September 04, 2006PECOS EnrolledAccepts Medicare Assignment
420 N GARFIELD AVE, SUITE 205, MONTEREY PARK, CA 91754(626) 572-8626(626) 280-0950 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Robert Fan Yang Tzeng Md NPPES

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

DR. ROBERT FAN YANG TZENG MD (NPI 1578665014) is an individual internal medicine provider in Monterey Park, California, licensed in California (A39498) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1978).

NPPES Registry Identity

NPI1578665014
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. ROBERT FAN YANG TZENGCredential: MD
Location Address420 N GARFIELD AVE, SUITE 205Monterey Park, CA 91754-1206
Mailing Address420 N Garfield Ave, Suite 205Monterey Park, CA 91754-1206 · (626) 572-8626 · Fax (626) 280-0950
Phone(626) 572-8626
Fax(626) 280-0950
Sole ProprietorYes
Medical School CMSOtherGraduated 1978
Enumeration DateSeptember 4, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1578665014 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 · A39498
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.
420 N GARFIELD AVE, Monterey Park, CA 91754
Open in Google Maps ↗

Other Identifiers 2

Medicare UPINA28897CA
Medicare ID-Type UnspecifiedA39498CA

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. Robert Fan Yang Tzeng 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 ID941386189
PECOS Enrollment IDI20080327000623
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 Robert Tzeng reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Health Alliance Medical Group
12 mi
Primary Care
17170 COLIMA RD STE G
Hacienda Heights, CA 91745
  • Reassigned Medicare billing, California enrollment
  • 2 clinicians in this Medicare group
NPI 1124248570 (626) 965-8202

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 8

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.
570 services203 patients
Telephone medical discussion with physician, 5-10 minutes 99441
A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.
243 services106 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.
238 services126 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
145 services145 patients
Annual depression screening, 5 to 15 minutes G0444
An annual depression screening is a short, routine evaluation to check for signs of depression. It involves answering a series of questions about your feelings, thoughts, and behaviors. The process takes about 15 minutes and helps detect depression early for better management.
89 services89 patients
Advance care planning, first 30 minutes 99497
Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.
41 services41 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91754 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
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.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
15 suppliers70 claims166 services$5.47 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
10 suppliers42 claims56 services$0.89 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

DR. GIN-HORN DANIEL LEE D.P.M.
Podiatrist
420 N GARFIELD AVE, SUITE#206
MONTEREY PARK, CA 91754
Los Angeles County (626) 572-8950
GIN-HORN DANIEL LEE D.P.M. INC
Podiatrist
420 N GARFIELD AVE, SUITE 206
MONTEREY PARK, CA 91754
Los Angeles County (626) 572-8950
KAM YUEN TSE, DO, INC
Family Medicine
420 N GARFIELD AVE, STE 203
MONTEREY PARK, CA 91754
Los Angeles County (626) 569-9983
HEALTHCARE MEDICAL PHARMACY INC
Pharmacy
420 N GARFIELD AVE, STE 101
MONTEREY PARK, CA 91754
Los Angeles County (626) 573-4513
HEALTHCARE MEDICAL PHARMACY INC
Pharmacy (Community/Retail Pharmacy)
420 N GARFIELD AVE, SUITE 101
MONTEREY PARK, CA 91754
Los Angeles County (626) 573-4513

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 Robert Tzeng's NPI number?

The NPI number for Robert Tzeng is 1578665014. It was assigned to this individual provider in the NPPES registry on September 4, 2006.

Where is Robert Tzeng located?

Robert Tzeng practices at 420 N Garfield Ave Suite 205, Monterey Park, CA 91754. The listed phone number is (626) 572-8626.

What is Robert Tzeng's specialty?

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

Is Robert Tzeng enrolled in Medicare?

Yes. Robert Tzeng 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 organization bills Medicare for Robert Tzeng's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Robert Tzeng reassigns Medicare benefits to Health Alliance Medical Group (Hacienda Heights, 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 Robert Tzeng'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 Robert Tzeng was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.