Matthew Slaught, MD
NPI 1639850738 · Internal Medicine Physician · Seattle, WA
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Slaught, MD is a Internal Medicine Physician provider in Seattle, WA (NPI 1639850738).
Provider details
- NPI number
- 1639850738
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 61549588 (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
2 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
- 2023-07-31
- Last updated
- 2024-05-24
- Certified
- 2024-05-24
Frequently asked questions
- What is Matthew Slaught's NPI number?
- Matthew Slaught's National Provider Identifier (NPI) is 1639850738, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Slaught's specialty?
- Matthew Slaught is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Slaught located?
- Matthew Slaught's practice location on file with NPPES is 925 Seneca St, Seattle, WA 98101-2742.
- What is Matthew Slaught's phone number?
- The practice phone number listed in the NPPES registry for Matthew Slaught is (206) 583-6079.
- Does Matthew Slaught accept Medicare?
- Matthew Slaught is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Slaught's NPI active?
- Yes — Matthew Slaught's NPI (1639850738) is active in the NPPES registry as of the last update on 2024-05-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.