DAVID CASSIUS, MD PS
NPI 1255520102
Physical Medicine & Rehabilitation - Pain Medicine in Seattle, WA
NPI Status: Active since October 17, 2007
Contact Information
901 BOREN AVE STE 712
SEATTLE, WA
ZIP 98104
Phone: (206) 624-9876
Fax: (888) 325-7193
- Organization
- Physical Medicine & Rehabilitation
- Pain Medicine
About DAVID CASSIUS, MD PS
This page provides the complete NPI Profile along with additional information for David Cassius, Md Ps, a provider established in Seattle, Washington operating as a Physical Medicine & Rehabilitation, focusing in pain medicine . The healthcare provider is registered in the NPI registry with number 1255520102 assigned on October 2007. The practitioner's primary taxonomy code is 2081P2900X with license number 37363 (WA). The provider is registered as an organization and their NPI record was last updated March 2026. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Dr. David Cassius Md (President)
- NPI
- 1255520102
- Provider Name
- DAVID CASSIUS, MD PS
- Entity Type
- Organization
- Location Address
- 901 BOREN AVE STE 712 SEATTLE, WA 98104
- Location Phone
- (206) 624-9876
- Location Fax
- (888) 325-7193
- Mailing Address
- 901 BOREN AVE STE 712 SEATTLE, WA 98104
- Mailing Phone
- (206) 624-9876
- Mailing Fax
- (888) 325-7193
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 10-17-2007
- Last Update Date
- 03-24-2026
- Code Navigator
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Physical Medicine & Rehabilitation Pain Medicine
- Taxonomy Code
- 2081P2900X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 37363
- License State
- WA
- Taxonomy Description
- A physician who provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic or cancer pain in both hospital and ambulatory settings. Patient care needs may also be coordinated with other specialists.
Group Taxonomy 193400000X SINGLE SPECIALTY GROUP
This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1255520102, we treat the final digit (2) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 38. The final step is to find the difference between that total and the next multiple of ten (40 - 38 = 2).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 38 is 40. The difference is the calculated check digit.
Other Providers at the Same Location
The following 2 providers are registered at the same or a nearby location.
SEATTLE, WA 98104
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1255520102, enumerated as an "organization" on October 17, 2007.
The provider is located at 901 BOREN AVE STE 712 SEATTLE, WA 98104 and the phone number is (206) 624-9876.
Physical Medicine & Rehabilitation with taxonomy code 2081P2900X and a focus in Pain Medicine.
