Jack Greiner
NPI 1972320125 · Acute Care Nurse Practitioner · Nutley, NJ
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jack Greiner is a Acute Care Nurse Practitioner provider in Nutley, NJ (NPI 1972320125).
Provider details
- NPI number
- 1972320125
- Entity type
- Individual
- Primary specialty
- Acute Care Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 26NJ15141400 (NJ)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr 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
- 2024-09-20
- Last updated
- 2024-09-20
- Certified
- 2024-09-20
Frequently asked questions
- What is Jack Greiner's NPI number?
- Jack Greiner's National Provider Identifier (NPI) is 1972320125, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jack Greiner's specialty?
- Jack Greiner is listed in the NPPES registry with a primary specialty of Acute Care Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Jack Greiner located?
- Jack Greiner's practice location on file with NPPES is 340 Kingsland St, Nutley, NJ 07110-1150.
- What is Jack Greiner's phone number?
- The practice phone number listed in the NPPES registry for Jack Greiner is (973) 761-9306.
- Does Jack Greiner accept Medicare?
- Jack Greiner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jack Greiner's NPI active?
- Yes — Jack Greiner's NPI (1972320125) is active in the NPPES registry as of the last update on 2024-09-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.