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William Siegfried, M.D.
NPI 1821162041 · Psychiatry Physician · Fresno, CA
William Siegfried, M.D. is a Psychiatry Physician provider in Fresno, CA (NPI 1821162041).
Provider details
- NPI number
- 1821162041
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G40134 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
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
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
5151 N Palm Ave
Suite 800
Fresno, CA 93704-2211
Phone: (559) 499-1233
Fax: (559) 499-1232
Street-level locationGet directions
Mailing address
5151 N Palm Ave
Fresno, CA 93704-2211
Registry dates
- Enumerated
- 2006-11-20
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Siegfried's NPI number?
- William Siegfried's National Provider Identifier (NPI) is 1821162041, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Siegfried's specialty?
- William Siegfried is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is William Siegfried located?
- William Siegfried's practice location on file with NPPES is 5151 N Palm Ave, Fresno, CA 93704-2211.
- What is William Siegfried's phone number?
- The practice phone number listed in the NPPES registry for William Siegfried is (559) 499-1233.
- Is William Siegfried's NPI active?
- Yes — William Siegfried's NPI (1821162041) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.