Stephen Sills
NPI 1538502844 · Anesthesiology Physician · Kirkland, WA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Sills is a Anesthesiology Physician provider in Kirkland, WA (NPI 1538502844).
Provider details
- NPI number
- 1538502844
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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
Additional practice locations (2)
- 925 Seneca StSeattle, WA 98101-2742Phone: (206) 583-6079Fax: (206) 341-1881
- 925 Seneca StSeattle, WA 98101-2742Phone: (206) 583-6079Fax: (206) 341-1881
Registry dates
- Enumerated
- 2013-04-17
- Last updated
- 2018-03-17
Frequently asked questions
- What is Stephen Sills's NPI number?
- Stephen Sills's National Provider Identifier (NPI) is 1538502844, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Sills's specialty?
- Stephen Sills is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Sills located?
- Stephen Sills's practice location on file with NPPES is 12040 Ne 128th St, Kirkland, WA 98034-3013.
- What is Stephen Sills's phone number?
- The practice phone number listed in the NPPES registry for Stephen Sills is (425) 899-1000.
- Does Stephen Sills accept Medicare?
- Stephen Sills is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Sills's NPI active?
- Yes — Stephen Sills's NPI (1538502844) is active in the NPPES registry as of the last update on 2018-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.