RUSTIN A MASSOUDI MD
NPI 1861836843
Urology in Stanford, CA
About Rustin A Massoudi Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RUSTIN A MASSOUDI MD (NPI 1861836843) is an individual urology provider in Stanford, California, licensed in California (A131914) and active in the NPI registry since April 2013. He is enrolled in Medicare PECOS, maintains a secondary practice location in Duarte, and is a graduate of Other (2013).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Rustin A Massoudi Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Rustin Massoudi reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Oxnard, CA 93036
- Reassigned Medicare billing, California enrollment
- 13,921 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.
Areas of Expertise CMS Part B claims 19
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94305 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.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
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 Rustin Massoudi's NPI number?
The NPI number for Rustin Massoudi is 1861836843. It was assigned to this individual provider in the NPPES registry on April 22, 2013.
Where is Rustin Massoudi located?
Rustin Massoudi practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.
What is Rustin Massoudi's specialty?
The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.
Is Rustin Massoudi enrolled in Medicare?
Yes. Rustin Massoudi is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Rustin Massoudi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Rustin Massoudi reassigns Medicare benefits to Southern California Permanente Medical Group (Oxnard, 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 Rustin Massoudi'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 Rustin Massoudi was last updated on May 2, 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.
# Rustin A Massoudi, MD · NPI 1861836843
Urology physician in Stanford, California. Individual provider, active in the CMS NPPES registry since April 22, 2013.
## Identity
- **NPI:** 1861836843 (Entity type: Individual)
- **Enumerated:** April 22, 2013
- **Primary specialty:** Urology · taxonomy 208800000X
- **State license:** A131914 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 PASTEUR DR, Stanford, CA 94305-2200
- **Phone:** (650) 723-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Southern California Permanente Medical Group (NPI 1275756652, Oxnard, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** May 2, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1861836843) · Data from the CMS NPPES public registry.