Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Abigail Irwin, D.C., DACBSP
Chiropractor in Oakland, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1770663643
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Registry record
Entity type Individual (Type 1)
Name Ms. Abigail Irwin
Credential D.C., DACBSP
Sex Female
Practice address 2100 Lakeshore Ave Ste E, Oakland, CA, 94606
Phone (510) 893-1577
Fax (510) 893-8907
Enumeration date Oct 16, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC 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 NPI 1770663643 active?
Yes — as of the latest NPPES snapshot, NPI 1770663643 is active (record last updated 2007-07-08).
How do I verify Abigail Irwin's NPI record?
Cross-check NPI 1770663643 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 2007-07-08.