RALLI AND GREWAL APC
NPI 1659727865
Internal Medicine - Endocrinology, Diabetes & Metabolism in Newport Beach, CA
About Ralli And Grewal Apc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RALLI AND GREWAL APC (NPI 1659727865) is a healthcare organization registered as an endocrinology, diabetes & metabolism in Newport Beach, California and active in the NPI registry since May 2016. The organization lists Sonia Grewal, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ralli And Grewal Apc 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 Ralli And Grewal Apc, which bills Medicare for the services this clinician delivers.
Clinician (1)
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 Ralli And Grewal Apc's NPI number?
The NPI number for Ralli And Grewal Apc is 1659727865. It was assigned to this organization in the NPPES registry on May 5, 2016.
Where is Ralli And Grewal Apc located?
Ralli And Grewal Apc is located at 520 Superior Ave Suite 390, Newport Beach, CA 92663. The listed phone number is (949) 548-3177.
What is Ralli And Grewal Apc's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Ralli And Grewal Apc enrolled in Medicare?
Yes. Ralli And Grewal Apc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Ralli And Grewal Apc?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Endocrinology) reassigns their Medicare billing to Ralli And Grewal Apc. 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 Ralli And Grewal Apc was last updated on May 5, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Ralli And Grewal Apc · NPI 1659727865
Endocrinology, Diabetes & Metabolism organization in Newport Beach, California. Organization record, active in the CMS NPPES registry since May 5, 2016.
## Identity
- **NPI:** 1659727865 (Entity type: Organization)
- **Enumerated:** May 5, 2016
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **Organization subpart:** No
- **Authorized official:** Sonia Grewal, PRESIDENT
## Practice location
- **Address:** 520 SUPERIOR AVE, SUITE 390, Newport Beach, CA 92663-3637
- **Phone:** (949) 548-3177 · **Fax:** (949) 548-3412
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Endocrinology) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 5, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1659727865) · Data from the CMS NPPES public registry.