NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Carol T Mei, M.D.

Hematology & Oncology Physician in Hollister, CA · enumerated 2005.

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

National Provider Identifier

1528041720

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Registry record

Entity type Individual (Type 1)
Name Carol T Mei
Credential M.D.
Sex Female
Practice address Hollister, CA, 95023
Phone (781) 340-0735
Fax (781) 331-6355
Enumeration date Nov 22, 2005
Last updated in NPPES Jun 4, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 78172 (MA) Secondary
207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License G70168 (CA) Primary
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
078172 Other MA TUFTS HEALTH CARE
4144823 Other MA CIGNA
J16708 Other MA BLUE CROSS BLUE SHIELD
9249 Other MA HARVARD PILGRIM
3153801 Medicaid MA -
0605053 Other MA AETNA US HEALTH

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 is the NPI number for Carol Mei?
The National Provider Identifier (NPI) for Carol Mei is 1528041720, a Type 1 (individual) record in the CMS NPPES registry.
Where does Carol Mei practice?
The practice location on file with NPPES is in Hollister, CA. 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 2021-06-04.