DR. MARY LEE GREWAL D.O.
NPI 1821480732
Surgery - Vascular Surgery in Loma Linda, CA
About Dr. Mary Lee Grewal D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARY LEE GREWAL D.O. (NPI 1821480732) is an individual vascular surgery provider in Loma Linda, California, licensed in California (19531) and active in the NPI registry since March 2015. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Mary Lee Grewal D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mary Grewal reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Loma Linda, CA 92354
- Reassigned Medicare billing, California enrollment
- 2,584 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92357 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOMA LINDA, CA 92357
LOMA LINDA, CA 92357
LOMA LINDA, CA 92357
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 Mary Grewal's NPI number?
The NPI number for Mary Grewal is 1821480732. It was assigned to this individual provider in the NPPES registry on March 2, 2015.
Where is Mary Grewal located?
Mary Grewal practices at 11201 Benton St, Loma Linda, CA 92357. The listed phone number is (098) 257-0849.
What is Mary Grewal's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Vascular Surgery, with taxonomy code 2086S0129X.
Is Mary Grewal enrolled in Medicare?
Yes. Mary Grewal is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mary Grewal's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Grewal reassigns Medicare benefits to Faculty Physicians And Surgeons Of Llusm (Loma Linda, CA). The 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 Mary Grewal's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Mary Grewal was last updated on July 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Mary Lee Grewal, D.O. · NPI 1821480732
Vascular Surgery physician in Loma Linda, California. Individual provider, active in the CMS NPPES registry since March 2, 2015.
## Identity
- **NPI:** 1821480732 (Entity type: Individual)
- **Enumerated:** March 2, 2015
- **Primary specialty:** Surgery - Vascular Surgery · taxonomy 2086S0129X
- **State license:** 19531 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 11201 BENTON ST, Loma Linda, CA 92357-3504
- **Phone:** (098) 257-0849
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Faculty Physicians And Surgeons Of Llusm (NPI 1790326825, Loma Linda, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 17, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1821480732) · Data from the CMS NPPES public registry.