Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Adelyn Tu-Chan, D.O.
Neurology Physician in Alameda, CA · enumerated 2010.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1720310329
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Registry record
Entity type Individual (Type 1)
Name Adelyn Tu-Chan
Credential D.O.
Sex Female
Practice address 2142 Pacific Ave, Alameda, CA, 94501
Phone (510) 517-1789
Enumeration date Feb 5, 2010
Last updated in NPPES Oct 8, 2018
Taxonomy & licenses
390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 1720310329 (CA) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD.
About the DO 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
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 Adelyn Tu-Chan?
Adelyn Tu-Chan is registered in NPPES with the primary taxonomy of Neurology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-10-08.