Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Castillo Samson, DC
Chiropractor in Concord, CA · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1780274142
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Mark Castillo Samson
Credential DC
Sex Male
Practice address 1170 Concord Ave Ste 100, Concord, CA, 94520
Phone (925) 681-0801
Fax (925) 681-0811
Enumeration date Jan 20, 2021
Last updated in NPPES Jan 20, 2021
Taxonomy & licenses
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 34786 | Other | CA | STATE LICENSE |
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
How do I verify Mark Samson's NPI record?
Cross-check NPI 1780274142 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1780274142 active?
Yes, as of the latest NPPES snapshot, NPI 1780274142 is active (record last updated 2021-01-20).
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-20.