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DR. THOMAS SIESHOLTZ M.D.
NPI 1578545349
Internal Medicine - Hematology & Oncology in Sellersville, PA

Active since November 17, 2005
915 LAWN AVENUE, SUITE 202, SELLERSVILLE, PA 18960(215) 453-3300(215) 453-3306 Get Directions Write a Review

NPPES record last updated: September 16, 2014. Verified against the NPPES registry weekly; last sync: August 30, 2026.

About Dr. Thomas Siesholtz M.d. NPPES

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

DR. THOMAS SIESHOLTZ M.D. (NPI 1578545349) is an individual hematology & oncology provider in Sellersville, Pennsylvania, licensed in Pennsylvania (MD022295E) and active in the NPI registry since November 2005.

NPPES Registry Identity

NPI1578545349
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameDR. THOMAS SIESHOLTZCredential: M.D.
Location Address915 LAWN AVENUE, SUITE 202Sellersville, PA 18960-1560
Mailing Address915 Lawn Ave, Suite 202Sellersville, PA 18960-1551 · (215) 453-3300 · Fax (215) 453-3306
Phone(215) 453-3300
Fax(215) 453-3306
Sole ProprietorNo
Enumeration DateNovember 17, 2005
Last NPPES UpdateSeptember 16, 2014
✔ NPI 1578545349 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in PA · MD022295E
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
915 LAWN AVENUE, Sellersville, PA 18960
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Other Identifiers 3

Medicare PIN156024PA
Medicaid0009629600002PA
Medicare UPINB40145PA

Other Providers at the Same Location NPPES

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

DR. JAMES LOUIS SPEARS MD
Internal Medicine (Hematology & Oncology)
915 LAWN AVENUE, SUITE 202
SELLERSVILLE, PA 18960
Bucks County (215) 453-3300

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 Thomas Siesholtz's NPI number?

The NPI number for Thomas Siesholtz is 1578545349. It was assigned to this individual provider in the NPPES registry on November 17, 2005.

Where is Thomas Siesholtz located?

Thomas Siesholtz practices at 915 Lawn Avenue Suite 202, Sellersville, PA 18960. The listed phone number is (215) 453-3300.

What is Thomas Siesholtz's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

When was this NPI record last updated?

The NPPES record for Thomas Siesholtz was last updated on September 16, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.