Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. John Legrand Hadlock, B.C.O.
Specialist in Mesa, AZ · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1588714158
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Registry record
Entity type Individual (Type 1)
Name Mr. John Legrand Hadlock
Credential B.C.O.
Sex Male
Practice address 1450 S Dobson Rd, #A206, Mesa, AZ, 85202
Phone (480) 962-5841
Fax (480) 649-9975
Enumeration date Jan 12, 2007
Last updated in NPPES Oct 10, 2011
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 034265001 | Medicaid | AZ | - |
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
What specialty is John Hadlock?
John Hadlock is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → Heather Mangam Specialist · Mesa, AZ NPI 1548256548 Kelly England Pediatrics Physician · Mesa, AZ NPI 1679563282 Robert Modic Dermatology Physician · Mesa, AZ NPI 1275506289 Narendra Myneni Vascular Surgery Physician · Mesa, AZ NPI 1437124732 Heinz Elsner Surgery Physician · Mesa, AZ NPI 1396710489 Joseph Scoggin Adult Reconstructive Orthopaedic Surgery Physician · Mesa, AZ NPI 1144297250 Glenn Brown Procedural Dermatology Physician · Mesa, AZ NPI 1780653030 Gayle Zerkel Physical Therapist · Mesa, AZ NPI 1457382558
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-10-10.