Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Heidi Chi-Quin So, M.D.

Pediatrics Physician in Dublin, CA · enumerated 2012.

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

National Provider Identifier

1932461464

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Registry record

Entity type Individual (Type 1)

Name Dr. Heidi Chi-Quin So

Credential M.D.

Sex Female

Practice address 4050 Dublin Blvd, Dublin, CA, 94568

Phone (510) 498-2886

Enumeration date Jun 11, 2012

Last updated in NPPES Aug 2, 2023

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 036.138509 (IL) Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License A149693 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Heidi So?

Heidi So is registered in NPPES with the primary taxonomy of Pediatrics Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-02.