Thomas Siesholtz, M.D.
NPI 1578545349 · Hematology & Oncology Physician · Sellersville, PA
Thomas Siesholtz, M.D. is a Hematology & Oncology Physician provider in Sellersville, PA (NPI 1578545349).
Provider details
- NPI number
- 1578545349
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD022295E (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-17
- Last updated
- 2014-09-16
Frequently asked questions
- What is Thomas Siesholtz's NPI number?
- Thomas Siesholtz's National Provider Identifier (NPI) is 1578545349, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Siesholtz's specialty?
- Thomas Siesholtz is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Siesholtz located?
- Thomas Siesholtz's practice location on file with NPPES is 915 Lawn Avenue, Sellersville, PA 18960-1560.
- What is Thomas Siesholtz's phone number?
- The practice phone number listed in the NPPES registry for Thomas Siesholtz is (215) 453-3300.
- Is Thomas Siesholtz's NPI active?
- Yes — Thomas Siesholtz's NPI (1578545349) is active in the NPPES registry as of the last update on 2014-09-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.