Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dorothy Karen Ma

Optometrist in Palo Alto, CA · enumerated 2021.

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

National Provider Identifier

1295301356

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dorothy Karen Ma

Sex Female

Practice address 3801 Miranda Ave, Palo Alto, CA, 94304

Phone (650) 493-5000

Enumeration date May 31, 2021

Last updated in NPPES Mar 20, 2022

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 34848 (CA) Primary

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 Dorothy Ma?

Dorothy Ma is registered in NPPES with the primary taxonomy of Optometrist. 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

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-03-20.