NPI Portal NPI Lookup & Verification

Dr. John Christopher Greene, D.C.

Dr. John Christopher Greene is a Sports Physician Chiropractor provider (Chiropractor) practicing in Irvine, CA, registered in the NPPES registry with NPI 1144245119 since 2006. The credential DC stands for Doctor of Chiropractic.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI 1144245119
Entity type Individual (Type 1)
Name Dr. John Christopher Greene
Credential D.C.
Sex Male
Practice address Irvine, CA, 92620
Phone 9498576631
Enumeration date 2006-07-12
Last updated in NPPES 2007-07-08

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code Specialty Primary License State
111NS0005X Sports Physician Chiropractor Primary 14078 CA

DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Copy-ready billing details
Provider: John Greene, D.C.
NPI: 1144245119
Taxonomy: 111NS0005X (Sports Physician Chiropractor)
Address: Irvine, CA, 92620

Other providers at this practice address

NPI Name Type Specialty Location
1326028374 Pamela Dorner Individual Physical Therapist Irvine, CA
1316927361 Dorner Physical Therapy Organization Physical Therapist Irvine, CA
1013924299 Brent Smith Individual Chiropractor Irvine, CA
1063521987 Tech Coast Rehab Inc Organization Orthotic Fitter Irvine, CA
1730260209 Charng-Shing Jean Individual General Practice Dentistry Irvine, CA
1376625665 Chong-Shu Wang Individual General Practice Dentistry Irvine, CA
1154461705 Jane Becker-Galusha Individual Physical Therapist Irvine, CA
1033236138 Regina Yang Individual General Practice Dentistry Irvine, CA

Verify this record

Cross-check NPI 1144245119 against the authoritative CMS record: view Dr. John Christopher Greene on the official NPPES registry .

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. Read the full guide or validate an NPI number.

Frequently asked questions

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.
What specialty is John Greene?
John Greene is registered in NPPES with the primary taxonomy of Sports Physician Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.