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

DR. DAVID SIEGEL M.D.
NPI 1023092590
Internal Medicine in Mather, CA

Q: What is David Siegel's NPI number?

The NPI number for David Siegel is 1023092590. It was assigned to this individual provider in the NPPES registry on November 30, 2005.

Q: What is David Siegel's specialty?

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

Q: When was this NPI record last updated?

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

Active since November 30, 2005

10535 HOSPITAL WAY, MATHER, CA 95655(916) 843-7096(916) 366-5475 Get Directions Write a Review

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

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About Dr. David Siegel M.d. NPPES

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

DR. DAVID SIEGEL M.D. (NPI 1023092590) is an individual internal medicine provider in Mather, California, licensed in California (G39933) and active in the NPI registry since November 2005.

NPPES Registry Identity

NPI1023092590

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. DAVID SIEGELCredential: M.D.

Location Address10535 HOSPITAL WAYMather, CA 95655-4200

Mailing Address10535 Hospital WayMather, CA 95655-4200 · (916) 843-7096 · Fax (916) 366-5475

Phone(916) 843-7096

Fax(916) 366-5475

Sole ProprietorNo

Enumeration DateNovember 30, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1023092590 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CA · G39933

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.

10535 HOSPITAL WAY, Mather, CA 95655

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