Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Aaron R Block, P.A.-C
Physician Assistant in Lewes, DE · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1700922390
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Registry record
Entity type Individual (Type 1)
Name Mr. Aaron R Block
Credential P.A.-C
Sex Male
Practice address 16337 Coastal Hwy, Lewes, DE, 19958
Phone (302) 291-9900
Fax (302) 200-9094
Enumeration date Jan 30, 2007
Last updated in NPPES Oct 20, 2023
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License C50000564 (DE) 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
What is the NPI number for Aaron Block?
The National Provider Identifier (NPI) for Aaron Block is 1700922390, a Type 1 (individual) record in the CMS NPPES registry.
Where does Aaron Block practice?
The practice location on file with NPPES is in Lewes, DE. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-10-20.