Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Merrill Long
Acupuncturist in Walnut Creek, CA · enumerated 2015.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821486325
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Registry record
Entity type Individual (Type 1)
Name Merrill Long
Sex Male
Practice address 1444 S Main St, Walnut Creek, CA, 94596
Phone (925) 939-6262
Enumeration date Jan 6, 2015
Last updated in NPPES Jan 6, 2015
Taxonomy & licenses
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 1821486325 active?
Yes, as of the latest NPPES snapshot, NPI 1821486325 is active (record last updated 2015-01-06).
How do I verify Merrill Long's NPI record?
Cross-check NPI 1821486325 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 →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-01-06.