Thomas Marshall, M.D.
NPI 1043202054 · Internal Medicine Physician · Glen Ellyn, IL
Thomas Marshall, M.D. is a Internal Medicine Physician provider in Glen Ellyn, IL (NPI 1043202054).
Provider details
- NPI number
- 1043202054
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036059776 (IL)
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
- 2005-08-16
- Last updated
- 2011-08-10
Frequently asked questions
- What is Thomas Marshall's NPI number?
- Thomas Marshall's National Provider Identifier (NPI) is 1043202054, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Marshall's specialty?
- Thomas Marshall is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Marshall located?
- Thomas Marshall's practice location on file with NPPES is 430 Pennsylvania Ave, Glen Ellyn, IL 60137-4464.
- What is Thomas Marshall's phone number?
- The practice phone number listed in the NPPES registry for Thomas Marshall is (630) 790-1792.
- Is Thomas Marshall's NPI active?
- Yes — Thomas Marshall's NPI (1043202054) is active in the NPPES registry as of the last update on 2011-08-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.