William Szymanski
NPI 1427229145 · Psychiatric/Mental Health Registered Nurse · Colton, CA
William Szymanski is a Psychiatric/Mental Health Registered Nurse provider in Colton, CA (NPI 1427229145).
Provider details
- NPI number
- 1427229145
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Registered NurseNursing Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 410912 (CA)
Specialties & taxonomies
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
- 2008-03-20
- Last updated
- 2008-03-20
Frequently asked questions
- What is William Szymanski's NPI number?
- William Szymanski's National Provider Identifier (NPI) is 1427229145, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Szymanski's specialty?
- William Szymanski is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Registered Nurse (Nursing Service Providers).
- Where is William Szymanski located?
- William Szymanski's practice location on file with NPPES is 400 N Pepper Ave, Colton, CA 92324-1801.
- What is William Szymanski's phone number?
- The practice phone number listed in the NPPES registry for William Szymanski is (909) 580-1800.
- Is William Szymanski's NPI active?
- Yes — William Szymanski's NPI (1427229145) is active in the NPPES registry as of the last update on 2008-03-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.