DAVID CASSIUS, MD PS
NPI 1255520102
Physical Medicine & Rehabilitation - Pain Medicine in Seattle, WA
About David Cassius, Md Ps NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DAVID CASSIUS, MD PS (NPI 1255520102) is a healthcare organization registered as a pain medicine in Seattle, Washington and active in the NPI registry since October 2007. The organization lists David Cassius, 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)
David Cassius, Md Ps 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 David Cassius, MD Ps, 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 David Cassius, MD Ps's NPI number?
The NPI number for David Cassius, MD Ps is 1255520102. It was assigned to this organization in the NPPES registry on October 17, 2007.
Where is David Cassius, MD Ps located?
David Cassius, MD Ps is located at 901 Boren Ave Ste 712, Seattle, WA 98104. The listed phone number is (206) 624-9876.
What is David Cassius, MD Ps's specialty?
The primary specialty registered for this NPI is Physical Medicine & Rehabilitation, specializing in Pain Medicine, with taxonomy code 2081P2900X.
Is David Cassius, MD Ps enrolled in Medicare?
Yes. David Cassius, MD Ps is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through David Cassius, MD Ps?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Physical Medicine and Rehabilitation) reassigns their Medicare billing to David Cassius, MD Ps. 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 David Cassius, MD Ps was last updated on March 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# David Cassius, Md Ps · NPI 1255520102
Pain Medicine organization in Seattle, Washington. Organization record, active in the CMS NPPES registry since October 17, 2007.
## Identity
- **NPI:** 1255520102 (Entity type: Organization)
- **Enumerated:** October 17, 2007
- **Primary specialty:** Physical Medicine & Rehabilitation - Pain Medicine · taxonomy 2081P2900X
- **Organization subpart:** No
- **Authorized official:** David Cassius, PRESIDENT
## Practice location
- **Address:** 901 BOREN AVE STE 712, Seattle, WA 98104-3301
- **Phone:** (206) 624-9876 · **Fax:** (888) 325-7193
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Physical Medicine and Rehabilitation) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 24, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1255520102) · Data from the CMS NPPES public registry.