Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Andrew Chao, M.D.

Maternal & Fetal Medicine Physician in Stockton, CA · enumerated 2006.

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

National Provider Identifier

1972578896

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Registry record

Entity type Individual (Type 1)

Name Dr. Andrew Chao

Credential M.D.

Sex Male

Practice address 1617 N California St, Ste. 2d, Stockton, CA, 95204

Phone (209) 933-9888

Fax (209) 933-9988

Enumeration date Feb 22, 2006

Last updated in NPPES Jan 28, 2015

Taxonomy & licenses

207VM0101X Maternal & Fetal Medicine Physician Allopathic & Osteopathic Physicians · License G46081 (CA) Primary

174400000X Specialist Other Service Providers · License G46081 (CA) Secondary

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

Other identifiers

Identifier	Type	State	Issuer
00G460810	Medicaid	CA	-

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

What specialty is Andrew Chao?

Andrew Chao is registered in NPPES with the primary taxonomy of Maternal & Fetal Medicine 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.

Other providers at this practice address

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Shermilla Shunmugham Obstetrics & Gynecology Physician · Stockton, CA NPI 1437158706 Vincent Pennisi Obstetrics & Gynecology Physician · Stockton, CA NPI 1487653341 Vicki Patterson Nurse Practitioner · Stockton, CA NPI 1801861737 David Eibling Obstetrics & Gynecology Physician · Stockton, CA NPI 1841256773 Green Brothers Pharmacy, Inc Community/Retail Pharmacy · Stockton, CA NPI 1619905221 Yesenia Cihuacoatl Registered Dietitian · Stockton, CA NPI 1093725434 Edward Rogan Pharmacist · Stockton, CA NPI 1487665295 Marisella Guerrero Pharmacist · Stockton, CA NPI 1336150044

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-01-28.