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S Callahan, M.D.
NPI 1619013703 · Internal Medicine Physician · Seattle, WA
S Callahan, M.D. is a Internal Medicine Physician provider in Seattle, WA (NPI 1619013703).
Provider details
- NPI number
- 1619013703
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD00021820 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
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
200 15th Ave E
Seattle, WA 98112-5260
Phone: (206) 326-3000
Street-level locationGet directions
Mailing address
Po Box 34581
Seattle, WA 98124-1581
Registry dates
- Enumerated
- 2007-01-29
- Last updated
- 2009-08-12
Frequently asked questions
- What is S Callahan's NPI number?
- S Callahan's National Provider Identifier (NPI) is 1619013703, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is S Callahan's specialty?
- S Callahan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is S Callahan located?
- S Callahan's practice location on file with NPPES is 200 15th Ave E, Seattle, WA 98112-5260.
- What is S Callahan's phone number?
- The practice phone number listed in the NPPES registry for S Callahan is (206) 326-3000.
- Is S Callahan's NPI active?
- Yes — S Callahan's NPI (1619013703) is active in the NPPES registry as of the last update on 2009-08-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.