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JOHN D MAST MD INC
NPI 1780662528
Surgery in Tracy, CA

Active since January 03, 2006
473 W EATON AVE, TRACY, CA 95376(209) 833-3320(209) 835-5929 Get Directions Write a Review

NPPES record last updated: January 6, 2010. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About John D Mast Md Inc NPPES

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

JOHN D MAST MD INC (NPI 1780662528) is a healthcare organization registered as a surgery in Tracy, California and active in the NPI registry since January 2006. The organization lists John D Mast, Md, as its authorized official.

NPPES Registry Identity

NPI1780662528
Entity TypeOrganization
Primary Taxonomy208600000X
Legal Business NameJOHN D MAST MD INC
Location Address473 W EATON AVETracy, CA 95376
Mailing AddressPo Box 986Woodbridge, CA 95258-0986 · (209) 339-9036 · Fax (209) 339-1901
Phone(209) 833-3320
Fax(209) 835-5929
Organization SubpartNo
Authorized OfficialJohn D MastMd · (209) 833-3320
Enumeration DateJanuary 3, 2006
Last NPPES UpdateJanuary 6, 2010
✔ NPI 1780662528 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in CA · G34146
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
473 W EATON AVE, Tracy, CA 95376
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Other Identifiers 3

Medicare ID-Type UnspecifiedZZZ27860ZCA
Medicaid00G341461CA
Medicare UPINA45800

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES

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

JOHN D MAST MD
Surgery
473 W EATON AVE
TRACY, CA 95376
San Joaquin County (209) 833-3320

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 John D Mast MD Inc's NPI number?

The NPI number for John D Mast MD Inc is 1780662528. It was assigned to this organization in the NPPES registry on January 3, 2006.

Where is John D Mast MD Inc located?

John D Mast MD Inc is located at 473 W Eaton Ave, Tracy, CA 95376. The listed phone number is (209) 833-3320.

What is John D Mast MD Inc's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

When was this NPI record last updated?

The NPPES record for John D Mast MD Inc was last updated on January 6, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.