Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dan Merritt, MA
Counselor in Norman, OK · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1598820631
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Registry record
Entity type Individual (Type 1)
Name Dan Merritt
Credential MA
Sex Male
Practice address 215 W Linn St, Norman, OK, 73069
Phone (405) 321-0022
Fax (405) 360-4918
Enumeration date Dec 27, 2006
Last updated in NPPES Jul 8, 2007
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 1598820631 active?
Yes, as of the latest NPPES snapshot, NPI 1598820631 is active (record last updated 2007-07-08).
How do I verify Dan Merritt's NPI record?
Cross-check NPI 1598820631 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.