William Greiner, MD
NPI 1225065253 · Diagnostic Radiology Physician · Seattle, WA
William Greiner, MD is a Diagnostic Radiology Physician provider in Seattle, WA (NPI 1225065253).
Provider details
- NPI number
- 1225065253
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD00016993 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-26
- Last updated
- 2011-09-28
Frequently asked questions
- What is William Greiner's NPI number?
- William Greiner's National Provider Identifier (NPI) is 1225065253, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Greiner's specialty?
- William Greiner is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Greiner located?
- William Greiner's practice location on file with NPPES is 1229 Madison St, Seattle, WA 98104-3586.
- What is William Greiner's phone number?
- The practice phone number listed in the NPPES registry for William Greiner is (206) 292-6233.
- Is William Greiner's NPI active?
- Yes — William Greiner's NPI (1225065253) is active in the NPPES registry as of the last update on 2011-09-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.