Katharine Williams, PHD and Associates
NPI 1891999223 · Psychologist · Youngstown, OH
Katharine Williams, PHD and Associates is a Psychologist organization in Youngstown, OH (NPI 1891999223).
Provider details
- NPI number
- 1891999223
- Entity type
- Organization
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Katharine Williams, PHD(330) 783-1718
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
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
Mailing address
Registry dates
- Enumerated
- 2007-06-11
- Last updated
- 2008-11-04
Frequently asked questions
- What is Katharine Williams, PHD and Associates's NPI number?
- Katharine Williams, PHD and Associates's National Provider Identifier (NPI) is 1891999223, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Katharine Williams, PHD and Associates?
- Katharine Williams, PHD and Associates is classified in the NPPES registry as Psychologist (Behavioral Health & Social Service Providers).
- Where is Katharine Williams, PHD and Associates located?
- Katharine Williams, PHD and Associates's practice location on file with NPPES is 5500 Market St Ste 205, Youngstown, OH 44512-2624.
- What is Katharine Williams, PHD and Associates's phone number?
- The practice phone number listed in the NPPES registry for Katharine Williams, PHD and Associates is (330) 783-1718.
- Who is the authorized official for Katharine Williams, PHD and Associates?
- The authorized official listed on Katharine Williams, PHD and Associates's NPPES record is Katharine Williams, PHD. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Katharine Williams, PHD and Associates's NPI active?
- Yes — Katharine Williams, PHD and Associates's NPI (1891999223) is active in the NPPES registry as of the last update on 2008-11-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.