Sibyl Siegfried, M.D.
NPI 1780827568 · Family Medicine Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sibyl Siegfried, M.D. is a Family Medicine Physician provider in Seattle, WA (NPI 1780827568).
Provider details
- NPI number
- 1780827568
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- MD043569 (DC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% 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)
- 1001 G St Nw Ste 200Apt 2Washington, DC 20001-4545Phone: (202) 660-0005Fax: (202) 660-0025
- 1600 7th Ave Ste 110Seattle, WA 98101-2288Phone: (206) 267-4390Fax: (206) 267-4391
Registry dates
- Enumerated
- 2009-04-09
- Last updated
- 2021-03-25
- Certified
- 2021-03-25
Frequently asked questions
- What is Sibyl Siegfried's NPI number?
- Sibyl Siegfried's National Provider Identifier (NPI) is 1780827568, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sibyl Siegfried's specialty?
- Sibyl Siegfried is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sibyl Siegfried located?
- Sibyl Siegfried's practice location on file with NPPES is 5201 Ballard Ave Nw, Seattle, WA 98107-4809.
- What is Sibyl Siegfried's phone number?
- The practice phone number listed in the NPPES registry for Sibyl Siegfried is (206) 267-4390.
- Does Sibyl Siegfried accept Medicare?
- Sibyl Siegfried is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sibyl Siegfried's NPI active?
- Yes — Sibyl Siegfried's NPI (1780827568) is active in the NPPES registry as of the last update on 2021-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.