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Gwendolyn Williams-Guess
NPI 1871200659 · Peer Specialist · San Bernardino, CA
Gwendolyn Williams-Guess is a Peer Specialist provider in San Bernardino, CA (NPI 1871200659).
Provider details
- NPI number
- 1871200659
- Entity type
- Individual
- Primary specialty
- Peer SpecialistOther Service Providers
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Other Service Providers
Profile Score
Established profile(53/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
83% 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
255 N D St Ste 412
San Bernardino, CA 92401-1715
Phone: (951) 788-5902
Fax: (951) 788-5903
Street-level locationGet directions
Mailing address
3576 Arlington Ave Ste 106
Riverside, CA 92506-3907
Registry dates
- Enumerated
- 2022-11-01
- Last updated
- 2023-03-09
- Certified
- 2023-03-09
Frequently asked questions
- What is Gwendolyn Williams-Guess's NPI number?
- Gwendolyn Williams-Guess's National Provider Identifier (NPI) is 1871200659, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gwendolyn Williams-Guess's specialty?
- Gwendolyn Williams-Guess is listed in the NPPES registry with a primary specialty of Peer Specialist (Other Service Providers).
- Where is Gwendolyn Williams-Guess located?
- Gwendolyn Williams-Guess's practice location on file with NPPES is 255 N D St Ste 412, San Bernardino, CA 92401-1715.
- What is Gwendolyn Williams-Guess's phone number?
- The practice phone number listed in the NPPES registry for Gwendolyn Williams-Guess is (951) 788-5902.
- Is Gwendolyn Williams-Guess's NPI active?
- Yes — Gwendolyn Williams-Guess's NPI (1871200659) is active in the NPPES registry as of the last update on 2023-03-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.