John Constantine, PHD
NPI 1386636595 · Psychologist · Greenfield, IN
John Constantine, PHD is a Psychologist provider in Greenfield, IN (NPI 1386636595).
Provider details
- NPI number
- 1386636595
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 20090254A (IN)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Allopathic & Osteopathic Physicians
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
- 2005-08-16
- Last updated
- 2010-10-08
Frequently asked questions
- What is John Constantine's NPI number?
- John Constantine's National Provider Identifier (NPI) is 1386636595, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Constantine's specialty?
- John Constantine is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is John Constantine located?
- John Constantine's practice location on file with NPPES is 120 W Mckenzie Rd, Greenfield, IN 46140-1072.
- What is John Constantine's phone number?
- The practice phone number listed in the NPPES registry for John Constantine is (317) 468-6200.
- Is John Constantine's NPI active?
- Yes — John Constantine's NPI (1386636595) is active in the NPPES registry as of the last update on 2010-10-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.