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

DR. ISAAC K TSAI M.D.
NPI 1013909407
Internal Medicine - Cardiovascular Disease in Corona, CA

Active since August 22, 2005PECOS Enrolled
100/100
CMS Quality Rating
341 MAGNOLIA AVE., SUITE 205, CORONA, CA 92879(951) 735-4771(951) 735-3855 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Isaac K Tsai M.d. NPPES

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

DR. ISAAC K TSAI M.D. (NPI 1013909407) is an individual cardiovascular disease provider in Corona, California, licensed in California (A39031) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1013909407
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameDR. ISAAC K TSAICredential: M.D.
Location Address341 MAGNOLIA AVE., SUITE 205Corona, CA 92879-3120
Mailing Address341 Magnolia Ave, Suite 205Corona, CA 92879-3330 · (951) 735-4771 · Fax (951) 735-3855
Phone(951) 735-4771
Fax(951) 735-3855
Sole ProprietorYes
Enumeration DateAugust 22, 2005
Last NPPES UpdateJuly 8, 2007
✔ NPI 1013909407 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in CA · A39031
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
341 MAGNOLIA AVE., Corona, CA 92879
Open in Google Maps ↗

Other Identifiers 2

Medicare ID-Type Unspecified00A390310CA
Medicare UPINA28797CA

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. Isaac K Tsai M.d. 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92879 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
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$74.08 typical visit price
range $19.37 – $146.42
Typical copayment $18.52 (range $4.84 – $36.60)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability100
Improvement Activities40

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.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
2 suppliers12 claims12 services$12.38 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
2 suppliers12 claims12 services$57.67 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Isaac Tsai's NPI number?

The NPI number for Isaac Tsai is 1013909407. It was assigned to this individual provider in the NPPES registry on August 22, 2005.

Where is Isaac Tsai located?

Isaac Tsai practices at 341 Magnolia Ave. Suite 205, Corona, CA 92879. The listed phone number is (951) 735-4771.

What is Isaac Tsai's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Isaac Tsai enrolled in Medicare?

Yes. Isaac Tsai is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Isaac Tsai 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.