Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Gretchen Louise Selby, LMSW
Social Worker in Los Alamos, NM · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1457396137
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Registry record
Entity type Individual (Type 1)
Name Gretchen Louise Selby
Credential LMSW
Sex Female
Practice address 1505 15th St, Los Alamos, NM, 87544
Phone (505) 662-3264
Fax (505) 662-9707
Enumeration date Jun 18, 2006
Last updated in NPPES Jul 13, 2026
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License M-057777 (NM) Primary
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 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 Gretchen Selby?
Gretchen Selby is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Rick Church Mental Health Counselor · Los Alamos, NM NPI 1255376323 Laverne Rodriguez Clinical Social Worker · Los Alamos, NM NPI 1518027598 Araceli Castillo Social Worker · Los Alamos, NM NPI 1023224268 Steven Koch Professional Counselor · Los Alamos, NM NPI 1124319231 Amanda Storey Mental Health Counselor · Los Alamos, NM NPI 1821366725
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-13.