John Grzebieniak, PH.D.
NPI 1437150968 · Addiction (Substance Use Disorder) Psychologist · New Castle, PA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Grzebieniak, PH.D. is a Addiction (Substance Use Disorder) Psychologist provider in New Castle, PA (NPI 1437150968).
Provider details
- NPI number
- 1437150968
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- License
- 84049 (OH)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
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
20 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
- 2005-08-09
- Last updated
- 2025-09-11
Frequently asked questions
- What is John Grzebieniak's NPI number?
- John Grzebieniak's National Provider Identifier (NPI) is 1437150968, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Grzebieniak's specialty?
- John Grzebieniak is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Psychologist (Behavioral Health & Social Service Providers).
- Where is John Grzebieniak located?
- John Grzebieniak's practice location on file with NPPES is 128 Leeper Dr, New Castle, PA 16102-2716.
- What is John Grzebieniak's phone number?
- The practice phone number listed in the NPPES registry for John Grzebieniak is (724) 667-9528.
- Does John Grzebieniak accept Medicare?
- John Grzebieniak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Grzebieniak's NPI active?
- Yes — John Grzebieniak's NPI (1437150968) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.