GEISINGER CLINIC
NPI 1770534166
Internal Medicine in Lewistown, PA
About Geisinger Clinic NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GEISINGER CLINIC (NPI 1770534166) is a healthcare organization registered as an internal medicine in Lewistown, Pennsylvania and active in the NPI registry since May 2006. The organization lists Cindy L Mull, System Director Enrollments, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 8
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Geisinger Clinic is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
4,415Medicare enrollment records show 4,415 clinicians reassign Medicare billing to Geisinger Clinic, which bills Medicare for the services they deliver. Of these, 30 practice at this address and 167 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 72
Nearest to this location (20)
See all 4,415Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Geisinger Clinic's NPI number?
The NPI number for Geisinger Clinic is 1770534166. It was assigned to this organization in the NPPES registry on May 12, 2006.
Where is Geisinger Clinic located?
Geisinger Clinic is located at 21 Geisinger Ln, Lewistown, PA 17044. The listed phone number is (717) 242-4200.
What is Geisinger Clinic's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Geisinger Clinic enrolled in Medicare?
Yes. Geisinger Clinic is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Geisinger Clinic?
According to the CMS Revalidation Reassignment List (October 2026 release), 4,415 clinicians in 72 Medicare specialties reassign their Medicare billing to Geisinger Clinic. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Nurse Practitioner (566), Certified Registered Nurse Anesthetist (CRNA) (411) and Internal Medicine (361). Of these, 30 practice at this address and 167 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Geisinger Clinic accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Buckeye Health Plan list Geisinger Clinic as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Geisinger Clinic was last updated on February 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months 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.
# Geisinger Clinic · NPI 1770534166
Internal Medicine organization in Lewistown, Pennsylvania. Organization record, active in the CMS NPPES registry since May 12, 2006.
## Identity
- **NPI:** 1770534166 (Entity type: Organization)
- **Enumerated:** May 12, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** Cindy Mull, SYSTEM DIRECTOR ENROLLMENTS
## Practice location
- **Address:** 21 GEISINGER LN, Lewistown, PA 17044-3400
- **Phone:** (717) 242-4200
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 4,415 clinicians in 72 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (566), Certified Registered Nurse Anesthetist (CRNA) (411), Internal Medicine (361); 30 practice at this address and 167 within 10 miles; [full list](https://npiprofile.com/npi/1770534166/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 25, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1770534166) · Data from the CMS NPPES public registry.