Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John Constantine, PHD
Psychologist in Greenfield, IN · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1386636595
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Registry record
Entity type Individual (Type 1)
Name John Constantine
Credential PHD
Sex Male
Practice address 120 W Mckenzie Rd, Suite F, Greenfield, IN, 46140
Phone (317) 468-6200
Fax (317) 468-6201
Enumeration date Aug 16, 2005
Last updated in NPPES Oct 8, 2010
Taxonomy & licenses
103T00000X Psychologist Behavioral Health & Social Service Providers · License 20090254A (IN) Primary
2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 20090254A (IN) Secondary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 000000275567 | Other | IN | ANTHEM PIN# |
| 100232230 | Medicaid | IN | - |
| 7800235 | Other | IN | AETNA PIN# |
| 200459330A | Medicaid | IN | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is NPI 1386636595 active?
Yes, as of the latest NPPES snapshot, NPI 1386636595 is active (record last updated 2010-10-08).
How do I verify John Constantine's NPI record?
Cross-check NPI 1386636595 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Melinda Cobb Psychiatry Physician · Greenfield, IN NPI 1639161896 Cynthia Montgomery Family Nurse Practitioner · Greenfield, IN NPI 1942284435 Andrea Baker Psychiatry Physician · Greenfield, IN NPI 1689648867 Community Hospitals of Indiana, Inc Family Medicine Physician · Greenfield, IN NPI 1184677148 Community Hospitals of Indiana, Inc Family Medicine Physician · Greenfield, IN NPI 1194772467 Delynn Williams Psychiatry Physician · Greenfield, IN NPI 1619915576 Ray Haas Family Medicine Physician · Greenfield, IN NPI 1053355974 Community Hospitals of Indiana Family Medicine Physician · Greenfield, IN NPI 1124036041
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-10-08.