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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Astrid Johanson Block, RN, CNS

Gerontology Clinical Nurse Specialist in Palo Alto, CA · enumerated 2007 · practices at Lucile Packard Stanford Children'S Hospital.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1528267465

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Registry record

Entity type Individual (Type 1)
Name Mrs. Astrid Johanson Block
Credential RN, CNS
Sex Female
Practice address 300 Pasteur Dr, Palo Alto, CA, 94304
Phone (510) 409-1503
Enumeration date Jul 12, 2007
Last updated in NPPES Nov 27, 2021

Taxonomy & licenses

364SG0600X Gerontology Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 2256 (CA) Primary
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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.

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Frequently asked questions

Where does Astrid Block practice?
The practice location on file with NPPES is in Palo Alto, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Astrid Block?
The National Provider Identifier (NPI) for Astrid Block is 1528267465, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-27.