David Cassius, MD Ps
David Cassius, MD Ps is a healthcare organization registered as Pain Medicine (Physical Medicine & Rehabilitation) Physician in Seattle, WA, holding Type 2 (organization) NPI 1255520102 since 2007. The authorized official on file is David Cassius, President.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1255520102 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | David Cassius, MD Ps |
| Practice address | 901 BOREN AVE STE 712, Seattle, WA, 98104 |
| Phone | 2066249876 |
| Fax | 8883257193 |
| Enumeration date | 2007-10-17 |
| Last updated in NPPES | 2026-03-24 |
Authorized official
| Name | David Cassius |
|---|---|
| Title | President |
| Phone | 2062558393 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 2081P2900X | Pain Medicine (Physical Medicine & Rehabilitation) Physician | Primary | 37363 | WA |
Copy-ready billing details
Provider: David Cassius, MD Ps NPI: 1255520102 Taxonomy: 2081P2900X (Pain Medicine (Physical Medicine & Rehabilitation) Physician) Address: 901 BOREN AVE STE 712, Seattle, WA, 98104
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1427321405 | Vascular & Surgical Care Northwest, Pllc | Organization | Vascular Surgery Physician | Seattle, WA |
| 1073872099 | Dr. Rob Killian | Organization | Health Service Clinic/Center | Seattle, WA |
Verify this record
Cross-check NPI 1255520102 against the authoritative CMS record: view David Cassius, MD Ps on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2026-03-24.