Stephen Slack, M.D.
NPI 1619080835 · Obstetrics & Gynecology Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Slack, M.D. is a Obstetrics & Gynecology Physician provider in Seattle, WA (NPI 1619080835).
Provider details
- NPI number
- 1619080835
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD00023080 (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
2 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 (1)
- 903 Medical Center DrArlington, WA 98223-1697Phone: (360) 435-0242Fax: (360) 425-9135
Registry dates
- Enumerated
- 2006-08-15
- Last updated
- 2022-07-21
Frequently asked questions
- What is Stephen Slack's NPI number?
- Stephen Slack's National Provider Identifier (NPI) is 1619080835, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Slack's specialty?
- Stephen Slack is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Slack located?
- Stephen Slack's practice location on file with NPPES is 1801 Nw Market St, Seattle, WA 98107-3987.
- What is Stephen Slack's phone number?
- The practice phone number listed in the NPPES registry for Stephen Slack is (206) 782-9335.
- Does Stephen Slack accept Medicare?
- Stephen Slack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Slack's NPI active?
- Yes — Stephen Slack's NPI (1619080835) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.