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DEEPAK THIAGARAJAN, A PROFESSIONAL MEDICAL CORPORATION
NPI 1043658644
Internal Medicine in Rancho Cucamonga, CA

Active since June 05, 2013
7974 HAVEN AVE STE 210, RANCHO CUCAMONGA, CA 91730(909) 881-5994 Get Directions Write a Review

NPPES record last updated: April 4, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 4, 2024, Oct 9, 2018 (2 updates tracked since 2018).

About Deepak Thiagarajan, A Professional Medical Corporation NPPES

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

DEEPAK THIAGARAJAN, A PROFESSIONAL MEDICAL CORPORATION (NPI 1043658644) is a healthcare organization registered as an internal medicine in Rancho Cucamonga, California and active in the NPI registry since June 2013. The organization maintains a secondary practice location in San Bernardino and lists Deepak Thiagarajan, Owner, as its authorized official.

NPPES Registry Identity

NPI1043658644
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameDEEPAK THIAGARAJAN, A PROFESSIONAL MEDICAL CORPORATION
Location Address7974 HAVEN AVE STE 210Rancho Cucamonga, CA 91730-3052
Mailing Address5036 Rodeo RdAlta Loma, CA 91737-2408 · (909) 921-3920
Phone(909) 881-5994
Organization SubpartNo
Authorized OfficialDeepak ThiagarajanOwner · (909) 921-3920
Enumeration DateJune 5, 2013
Last NPPES UpdateApril 4, 20242 updates tracked since enumeration
NPPES CertifiedApril 4, 2024
✔ NPI 1043658644 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 · A113059
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.
7974 HAVEN AVE STE 210, Rancho Cucamonga, CA 91730
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Secondary Practice Location 1

Location 12101 N Waterman AveSan Bernardino, CA 92404-4836 · Phone (909) 921-3920

Other Identifiers 1

Medicaid7516240CA

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)

Deepak Thiagarajan, A Professional Medical Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Deepak Thiagarajan, A Professional Medical Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Deepak Thiagarajan, MD
Hospitalist
NPI 1205052990
7974 HAVEN AVE STE 210
Rancho Cucamonga, CA 91730
(909) 881-5994
✔ PECOS✔ Accepts MedicareSame address

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

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 Deepak Thiagarajan, A Professional Medical Corporation's NPI number?

The NPI number for Deepak Thiagarajan, A Professional Medical Corporation is 1043658644. It was assigned to this organization in the NPPES registry on June 5, 2013.

Where is Deepak Thiagarajan, A Professional Medical Corporation located?

Deepak Thiagarajan, A Professional Medical Corporation is located at 7974 Haven Ave Ste 210, Rancho Cucamonga, CA 91730. The listed phone number is (909) 881-5994.

What is Deepak Thiagarajan, A Professional Medical Corporation's specialty?

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

Is Deepak Thiagarajan, A Professional Medical Corporation enrolled in Medicare?

Yes. Deepak Thiagarajan, A Professional Medical Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Deepak Thiagarajan, A Professional Medical Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Hospitalist) reassigns their Medicare billing to Deepak Thiagarajan, A Professional Medical Corporation. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Deepak Thiagarajan, A Professional Medical Corporation was last updated on April 4, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.