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TUSTIN IRVINE INTERNAL MEDICINE GROUP INC.
NPI 1689633125
Internal Medicine in Tustin, CA

Active since March 22, 2006CLIA 05D0579825 · Waiver
17400 IRVINE BLVD, SUITE F, TUSTIN, CA 92780(714) 838-5610(714) 838-5931 Get Directions Write a Review

NPPES record last updated: June 10, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Tustin Irvine Internal Medicine Group Inc. NPPES

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

TUSTIN IRVINE INTERNAL MEDICINE GROUP INC. (NPI 1689633125) is a healthcare organization registered as an internal medicine in Tustin, California and active in the NPI registry since March 2006. The organization holds a CLIA Waiver certificate valid through December 15, 2027 and lists Mario S Ficarola, President, as its authorized official.

NPPES Registry Identity

NPI1689633125
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameTUSTIN IRVINE INTERNAL MEDICINE GROUP INC.
Location Address17400 IRVINE BLVD, SUITE FTustin, CA 92780-3030
Mailing Address17400 Irvine Blvd, Suite FTustin, CA 92780-3030 · (714) 838-5610 · Fax (714) 838-5931
Phone(714) 838-5610
Fax(714) 838-5931
Organization SubpartNo
Authorized OfficialMario S FicarolaPresident · (714) 838-5610
Enumeration DateMarch 22, 2006
Last NPPES UpdateJune 10, 2011
✔ NPI 1689633125 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
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.
17400 IRVINE BLVD, Tustin, CA 92780
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Other Identifiers 17

Medicare UPINA 22336CA
Medicare PINWA81987CCA
Medicare PINWG14371ACA
Medicare UPING58721CA
Medicare UPINA 39242CA
Medicare PINW 1779CA
OtherYYY 42455 YCA · Blue Shield
Medicare PINWA61483DCA
Medicare UPINI 13910CA
Medicare UPINA 47465CA
Medicare PINWG38399ACA
Medicare PINWG56794ACA
MedicaidYYY 42455 YCA
Other1962544494CA · Npi
Medicare UPINE 88030CA
Medicare UPINI 59444CA
Medicare PINWA91056ACA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Tustin Irvine Internal Medicine Group Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

7

Medicare enrollment records show 7 clinicians reassign Medicare billing to Tustin Irvine Internal Medicine Group Inc., which bills Medicare for the services they deliver. Of these, 4 practice at this address and 6 within 10 miles. They are listed nearest first.

Clinicians, nearest first (7)

Thomas Hwang, M.D.
Internal Medicine
NPI 1124039722
17400 IRVINE BLVD SUITE F
Tustin, CA 92780
(714) 838-5610
✔ PECOS✔ Accepts MedicareSame address
Julia Motherway, M.D.
Internal Medicine
NPI 1962544494
17400 IRVINE BLVD SUITE F
Tustin, CA 92780
(714) 838-5610
✔ PECOS✔ Accepts MedicareSame address
Susan Ban, M.D.
Internal Medicine
NPI 1053324970
17400 IRVINE BLVD SUITE F
Tustin, CA 92780
(714) 838-5610
✔ PECOS✔ Accepts MedicareSame address
Huong Duong, M.D.
Internal Medicine
NPI 1013020437
17400 IRVINE BLVD SUITE F
Tustin, CA 92780
(714) 838-5610
✔ PECOS✔ Accepts MedicareSame address
Neil Patel, MD
Internal Medicine
NPI 1235767716
101 THE CITY DR S STE 400
Orange, CA 92868
(714) 456-5691
✔ PECOS✔ Accepts Medicare4.5 mi
Neha Savalia, M.D.
Internal Medicine
NPI 1114913043
4900 PROSPECT AVE
Yorba Linda, CA 92886
(714) 528-4211
✔ PECOS9.8 mi
Mario Ficarola, M.D.
Internal Medicine
NPI 1104939529
21634 RETREAT PKWY
Corona, CA 92883
(951) 493-6926
✔ PECOS19 mi

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

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 05D0579825

Tustin Irvine Internal Med Group, Inc · Tustin, CA
Active · expires Dec 15, 2027
CLIA Number05D0579825
Laboratory TypePhysician Office
Certificate Effective DateDecember 16, 2025
Certificate Expiration DateDecember 15, 2027
Laboratory DirectorMario S. Ficarola MD
Laboratory Phone(714) 838-5610
Laboratory LocationTustin Irvine Internal Med Group, Inc15000 Kensington Park Drive Suite 360, Tustin, CA 92782
CLIA data matches this NPI record on: Phone
This certificate is issued to a laboratory to perform only waived tests.

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 Tustin Irvine Internal Medicine Group Inc.'s NPI number?

The NPI number for Tustin Irvine Internal Medicine Group Inc. is 1689633125. It was assigned to this organization in the NPPES registry on March 22, 2006.

Where is Tustin Irvine Internal Medicine Group Inc. located?

Tustin Irvine Internal Medicine Group Inc. is located at 17400 Irvine Blvd Suite F, Tustin, CA 92780. The listed phone number is (714) 838-5610.

What is Tustin Irvine Internal Medicine Group Inc.'s specialty?

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

Is Tustin Irvine Internal Medicine Group Inc. enrolled in Medicare?

Yes. Tustin Irvine Internal Medicine Group Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Tustin Irvine Internal Medicine Group Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 7 clinicians, all in Internal Medicine, reassign their Medicare billing to Tustin Irvine Internal Medicine Group Inc.. A 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 the clinician's services. Of these, 4 practice at this address and 6 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Tustin Irvine Internal Medicine Group Inc. hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D0579825) is associated with this NPI, valid through December 15, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Tustin Irvine Internal Medicine Group Inc. was last updated on June 10, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.