William Schleyer, MD
NPI 1598175150 · Psychiatry Physician · Cambridge, MA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Schleyer, MD is a Psychiatry Physician provider in Cambridge, MA (NPI 1598175150).
Provider details
- NPI number
- 1598175150
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 19005 (NH)
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
12 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)
- Mg Gourley Va/Dod Outpatient Clinic201 9th StMarina, CA 93933Phone: (831) 884-1022
Registry dates
- Enumerated
- 2014-05-05
- Last updated
- 2020-10-07
- Certified
- 2020-10-07
Frequently asked questions
- What is William Schleyer's NPI number?
- William Schleyer's National Provider Identifier (NPI) is 1598175150, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Schleyer's specialty?
- William Schleyer is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is William Schleyer located?
- William Schleyer's practice location on file with NPPES is 1493 Cambridge St, Cambridge, MA 02139-1099.
- What is William Schleyer's phone number?
- The practice phone number listed in the NPPES registry for William Schleyer is (617) 665-1000.
- Does William Schleyer accept Medicare?
- William Schleyer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Schleyer's NPI active?
- Yes — William Schleyer's NPI (1598175150) is active in the NPPES registry as of the last update on 2020-10-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.