Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Michael S Mcmahan, D.M.D.
Dentist in Oceanside, CA · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1134390248
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Registry record
Entity type Individual (Type 1)
Name Michael S Mcmahan
Credential D.M.D.
Sex Male
Practice address 2420 Vista Way, Ste 105, Oceanside, CA, 92054
Phone (760) 435-1195
Fax (760) 435-1168
Enumeration date Mar 17, 2008
Last updated in NPPES May 29, 2013
Taxonomy & licenses
DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees.
About the DMD 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
What specialty is Michael Mcmahan?
Michael Mcmahan is registered in NPPES with the primary taxonomy of Dentist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.
Other providers at this practice address
Browse all → The Dental Offices of Dr Mcmahan DDS and Dr Rosell DDS Inc General Practice Dentistry · Oceanside, CA NPI 1376638296 Pacific Sleep Medicine A Medical Corporation Sleep Disorder Diagnostic Clinic/Center · Oceanside, CA NPI 1972682631 Pacific Sleep Medicine Services, Inc Durable Medical Equipment & Medical Supplies · Oceanside, CA NPI 1689889735 Sound Balance Audiology, Inc Prosthetic/Orthotic Supplier · Oceanside, CA NPI 1952507303 Sound Balance Audiology, Inc. Audiologist · Oceanside, CA NPI 1083814727 James Rosell Dentist · Oceanside, CA NPI 1730350836 Advanced Sleep Medicine Services, Inc. Sleep Disorder Diagnostic Clinic/Center · Oceanside, CA NPI 1366716623
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-05-29.