Stephen F. Slack, M.D.
Obstetrics & Gynecology Physician · Seattle, WA
Stephen F. Slack, M.D. is an obstetrics & gynecology physician with a practice address in Seattle, Washington, and NPI 1619080835, issued on Aug 15, 2006. Check the license (Washington MD00023080, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Stephen F. Slack
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- MD00023080 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1801 NW Market St, Seattle, WA 98107
- Phone
- (206) 782-9335
- Enumerated
- Aug 15, 2006
- Record last updated
- Jul 21, 2022
- Fax
- (206) 781-8713
- Medicare enrollment
- Enrolled (PECOS I20060123000165); accepts Medicare assignment
- Medical or professional school
- Washington University School Of Medicine, 1984
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,038 in Washington → Look up another NPI →
Also registered at 1801 NW Market St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- James Ballo, M.D.Urology Physician1508878570
Verify Stephen F. Slack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00023080Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Obhg Washington PCRenton, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen F. Slack among 1,038 obstetrics & gynecology physician records in Washington
Stephen F. Slack, M.D. is one of 1,038 obstetrics & gynecology physician records with a practice address in Washington. 68% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 52% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated1984 · median 2007 among the 582 with a school on file
- Record last updated2022 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Washington
There are 1,038 obstetrics & gynecology physician records in Washington.
All 1,038 in Washington → Every provider in Seattle → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Rebecca Dehority, MDSeattle, WA 981071134654577
- Romina Dunnam, DOSeattle, WA 981071780704023
- Teresa Goepfert, D. O.Seattle, WA 981071225354152
- Heidi Knickerbocker, MDSeattle, WA 981071700945037
- Leslie Miller, M.D.Seattle, WA 981071932289931
- Ashwini Pandit, MDSeattle, WA 981071306086210
- Clara Savage, MDSeattle, WA 981071467748947
- Cynthia White, MDSeattle, WA 981071720146269
Common questions
What is Stephen F. Slack, M.D.'s NPI number?
Stephen F. Slack, M.D.'s National Provider Identifier (NPI) is 1619080835, issued on Aug 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen F. Slack, M.D. located?
The NPPES record lists a practice address at 1801 NW Market St, Seattle, WA, 98107. Phone: (206) 782-9335. Providers update this record themselves, so call before visiting.
How can I verify Stephen F. Slack, M.D.'s license?
NPPES lists Washington license number MD00023080, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.