Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Al-Sayed MD Inc

Organization Endocrinology, Diabetes & Metabolism Physician · NPI 1265016687

Al-Sayed MD Inc is an Endocrinology, Diabetes & Metabolism Physician in Diamond Bar, California. Registered with an NPI since 2021.

In the registry since
2021
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

1375 Rolling Knoll Rd
Diamond Bar, CA 91765-2637
Phone: (989) 980-8779
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X

Record details

NPI number1265016687
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Marlise Negrette — Medical Biller · (909) 793-5511
NPI enumeratedMay 11, 2021
Last updated in NPPESMay 11, 2021
Certification dateMay 11, 2021
Mailing address1375 Rolling Knoll Rd, Diamond Bar, CA 91765-2637