Joanna Hahn

Joanna Hahn is a Family Nurse Practitioner provider (Nurse Practitioner) practicing in Concord, CA, registered in the NPPES registry with NPI 1669920815 since 2016.

✓ Active NPI ✓ Valid NPI checksum

NPI	1669920815
Entity type	Individual (Type 1)
Name	Joanna Hahn
Sex	Female
Practice address	2280 DIAMOND BLVD STE 520, Concord, CA, 94520
Phone	9256821951
Enumeration date	2016-09-16
Last updated in NPPES	2021-05-19

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
363LF0000X	Family Nurse Practitioner	Primary	9274113	FL

Copy-ready billing details

Provider: Joanna Hahn
NPI: 1669920815
Taxonomy: 363LF0000X (Family Nurse Practitioner)
Address: 2280 DIAMOND BLVD STE 520, Concord, CA, 94520

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1366052680	Chenchen Zhang	Individual	Audiologist	Concord, CA
1891364709	Hayley Morris	Individual	Audiologist	Concord, CA

Verify this record

Cross-check NPI 1669920815 against the authoritative CMS record: view Joanna Hahn on the official NPPES registry .

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. Read the full guide or validate an NPI number.

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 Joanna Hahn?

Joanna Hahn is registered in NPPES with the primary taxonomy of Family Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2021-05-19.