Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Abraham Hershel Grosswasser, D.C.
Chiropractor in Los Angeles, CA · enumerated 2013.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1326487844
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Registry record
Entity type Individual (Type 1)
Name Dr. Abraham Hershel Grosswasser
Credential D.C.
Sex Male
Practice address 2001 S Barrington Ave, Suite 101, Los Angeles, CA, 90025
Phone (310) 575-5575
Enumeration date Jun 18, 2013
Last updated in NPPES Jun 18, 2013
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
How do I verify Abraham Grosswasser's NPI record?
Cross-check NPI 1326487844 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1326487844 active?
Yes, as of the latest NPPES snapshot, NPI 1326487844 is active (record last updated 2013-06-18).
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-06-18.