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GREWAL MEDICAL ASSOCIATES, INC
NPI 1639135510
Internal Medicine in Tracy, CA

Active since April 21, 2006
530 W EATON AVE STE K, TRACY, CA 95376(209) 835-4232(209) 835-3246 Get Directions Write a Review

NPPES record last updated: March 31, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Grewal Medical Associates, Inc NPPES

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

GREWAL MEDICAL ASSOCIATES, INC (NPI 1639135510), doing business as Tracy Medical Group, is a healthcare organization registered as an internal medicine in Tracy, California and active in the NPI registry since April 2006. The organization lists Puneet K. Grewal, Manager/internal Medicine Pcp, as its authorized official.

NPPES Registry Identity

NPI1639135510
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameGREWAL MEDICAL ASSOCIATES, INC
Location Address530 W EATON AVE STE KTracy, CA 95376
Mailing Address530 W. Eaton Ave., Ste KTracy, CA 95376-3455 · (209) 835-4232 · Fax (209) 835-3246
Phone(209) 835-4232
Fax(209) 835-3246
Organization SubpartNo
Authorized OfficialPuneet K. GrewalManager/internal Medicine Pcp · (209) 835-4232
Enumeration DateApril 21, 2006
Last NPPES UpdateMarch 31, 2026
NPPES CertifiedMarch 31, 2026
✔ NPI 1639135510 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A53793
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.
Also ListedFamily MedicineTaxonomy 207Q00000X · License A40558 (CA)
530 W EATON AVE STE K, Tracy, CA 95376
Open in Google Maps ↗

Other Names 1

Doing Business AsTracy Medical Group

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include SummaCare.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Grewal Medical Associates, Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Grewal Medical Associates, Inc, which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.

Clinicians, nearest first (2)

Harpreet Grewal, M.D.
Family Practice
NPI 1700842697
530 W EATON AVE STE K
Tracy, CA 95376
(209) 835-4232
✔ PECOS✔ Accepts MedicareSame address
Puneet Grewal, M.D.
Internal Medicine
NPI 1750347639
530 W EATON AVE STE K
Tracy, CA 95376
(209) 835-4232
✔ 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 Grewal Medical Associates, Inc's NPI number?

The NPI number for Grewal Medical Associates, Inc is 1639135510. It was assigned to this organization in the NPPES registry on April 21, 2006. The provider is doing business as Tracy Medical Group.

Where is Grewal Medical Associates, Inc located?

Grewal Medical Associates, Inc is located at 530 W Eaton Ave Ste K, Tracy, CA 95376. The listed phone number is (209) 835-4232.

What is Grewal Medical Associates, Inc's specialty?

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

Is Grewal Medical Associates, Inc enrolled in Medicare?

Yes. Grewal Medical Associates, Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Grewal Medical Associates, Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Grewal Medical Associates, Inc, in Family Practice and Internal Medicine. 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, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Grewal Medical Associates, Inc accept?

Health plans from SummaCare list Grewal Medical Associates, Inc as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Grewal Medical Associates, Inc was last updated on March 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.