Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Diana Szeming Ma, O.D.
Optometrist in Flushing, NY · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1689839110
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Diana Szeming Ma
Credential O.D.
Sex Female
Practice address 14008 Sanford Avenue, Flushing, NY, 11355
Phone (718) 353-3211
Fax (718) 353-3212
Enumeration date Jul 24, 2008
Last updated in NPPES Apr 23, 2012
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD 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.
Frequently asked questions
What specialty is Diana Ma?
Diana 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.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-04-23.