Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

MOHAMMAD M SIDDIQUI MD
NPI 1235190315
Internal Medicine in Holliston, MA

Active since March 29, 2006
479 WASHINGTON ST, HOLLISTON, MA 01746(508) 429-2377(508) 429-2607 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Mohammad M Siddiqui Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MOHAMMAD M SIDDIQUI MD (NPI 1235190315) is an individual internal medicine provider in Holliston, Massachusetts, licensed in Massachusetts (71839) and active in the NPI registry since March 2006.

NPPES Registry Identity

NPI1235190315
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameMOHAMMAD M SIDDIQUICredential: MD
Location Address479 WASHINGTON STHolliston, MA 01746
Mailing Address479 Washington StHolliston, MA 01746 · (508) 429-2377 · Fax (508) 429-2607
Fax(508) 429-2607
Sole ProprietorNo
Enumeration DateMarch 29, 2006
Last NPPES UpdateJuly 13, 2026
NPI 1235190315 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in MA · 71839
Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

479 WASHINGTON ST, Holliston, MA 01746

Other Identifiers 1

Medicaid2059657MA

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Nurse Practitioner (Family)
479 WASHINGTON ST
HOLLISTON, MA 01746
Dentist
479 WASHINGTON ST
HOLLISTON, MA 01746
Clinic/Center (Dental)
479 WASHINGTON ST, SUITE 2
HOLLISTON, MA 01746
Internal Medicine
479 WASHINGTON ST
HOLLISTON, MA 01746
Nurse Practitioner (Family)
479 WASHINGTON ST
HOLLISTON, MA 01746

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mohammad Siddiqui's NPI number?

The NPI number for Mohammad Siddiqui is 1235190315. It was assigned to this individual provider in the NPPES registry on March 29, 2006.

Where is Mohammad Siddiqui located?

Mohammad Siddiqui practices at 479 Washington St, Holliston, MA 01746. The listed phone number is (508) 429-2377.

What is Mohammad Siddiqui's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Mohammad Siddiqui was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.