DR. SEAN O. RASSMAN MD
NPI 1730237686
Neuromusculoskeletal Medicine & OMM in Fontana, CA
About Dr. Sean O. Rassman Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SEAN O. RASSMAN MD (NPI 1730237686) is an individual neuromusculoskeletal medicine & omm provider in Fontana, California, licensed in California (A92176) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of Other (1999).
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 and accepts Medicare assignment
Dr. Sean O. Rassman 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 Sean Rassman reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Fontana, CA 92335
- Reassigned Medicare billing, California enrollment
- 5,228 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.
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.
FONTANA, CA 92335
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 Sean Rassman's NPI number?
The NPI number for Sean Rassman is 1730237686. It was assigned to this individual provider in the NPPES registry on January 8, 2007.
Where is Sean Rassman located?
Sean Rassman practices at 9961 Sierra Ave Department Of Orthopedic Surgery, Fontana, CA 92335. The listed phone number is (909) 427-3910.
What is Sean Rassman's specialty?
The primary specialty registered for this NPI is Neuromusculoskeletal Medicine & OMM with taxonomy code 204D00000X.
Is Sean Rassman enrolled in Medicare?
Yes. Sean Rassman 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 Sean Rassman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sean Rassman reassigns Medicare benefits to Southern California Permanente Medical Group (Fontana, 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 Sean Rassman'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 Sean Rassman was last updated on December 3, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Dr. Sean O. Rassman, MD · NPI 1730237686
Neuromusculoskeletal Medicine & OMM physician in Fontana, California. Individual provider, active in the CMS NPPES registry since January 8, 2007.
## Identity
- **NPI:** 1730237686 (Entity type: Individual)
- **Enumerated:** January 8, 2007
- **Primary specialty:** Neuromusculoskeletal Medicine & OMM · taxonomy 204D00000X
- **State license:** A92176 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 9961 SIERRA AVE, DEPARTMENT OF ORTHOPEDIC SURGERY, Fontana, CA 92335-6720
- **Phone:** (909) 427-3910
## 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 1689606196, Fontana, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1999
## Record status
- **NPPES last updated:** December 3, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1730237686) · Data from the CMS NPPES public registry.