Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Thomas Charles Barker, D.C.
Chiropractor in Merrimack, NH · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1427288802
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Registry record
Entity type Individual (Type 1)
Name Dr. Thomas Charles Barker
Credential D.C.
Sex Male
Practice address 634 Daniel Webster Hwy, Unit 2, Merrimack, NH, 03054
Phone (603) 424-9444
Fax (603) 424-4999
Enumeration date Jul 21, 2009
Last updated in NPPES Jul 21, 2009
Taxonomy & licenses
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC credential
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 Thomas Barker's NPI record?
Cross-check NPI 1427288802 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1427288802 active?
Yes, as of the latest NPPES snapshot, NPI 1427288802 is active (record last updated 2009-07-21).
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-07-21.