Quick answers
- Where does Thomas D. Challman see patients?
- Medicare's clinician data lists 2 practice locations, including Danville, PA and Forty Fort, PA. Call before your visit to confirm the address.
- What is Thomas D. Challman's specialty?
- Medicare lists Pediatric Medicine as the primary specialty.
- Does Thomas D. Challman accept Medicare assignment?
- Yes. Medicare's clinician data says Thomas D. Challman accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Thomas D. Challman?
- (570) 718-4140, as listed in official Medicare / NPI Registry data.
- What is Thomas D. Challman's NPI number?
- 1841265642. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Thomas D. Challman is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 N Academy AveDanville, PA 17822
- 190 Welles St, Suite 122Forty Fort, PA 18704 (570) 718‑4140
Group practices
Medicare enrollment lists Thomas D. Challman as a member of this group (CMS data updated 2026-10-02).
- Geisinger Clinic3,467 clinicians in the group
Specialties
- Pediatric Medicineprimary
Other pediatricians in Danville
Clinicians with the same Medicare primary specialty in Danville, PA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841265642 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians