William Grabowski, MD
NPI 1952336307 · Diagnostic Radiology Physician · Seattle, WA
William Grabowski, MD is a Diagnostic Radiology Physician provider in Seattle, WA (NPI 1952336307).
Provider details
- NPI number
- 1952336307
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD00030112 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$21 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-12
- Last updated
- 2007-12-05
Frequently asked questions
- What is William Grabowski's NPI number?
- William Grabowski's National Provider Identifier (NPI) is 1952336307, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Grabowski's specialty?
- William Grabowski is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Grabowski located?
- William Grabowski's practice location on file with NPPES is 16251 Sylvester Rd Sw, Seattle, WA 98166.
- What is William Grabowski's phone number?
- The practice phone number listed in the NPPES registry for William Grabowski is (206) 248-9729.
- Is William Grabowski's NPI active?
- Yes — William Grabowski's NPI (1952336307) is active in the NPPES registry as of the last update on 2007-12-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.