DR. MARK A SHELLY M.D.
NPI 1023027927
Internal Medicine - Infectious Disease in Danville, PA
About Dr. Mark A Shelly M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK A SHELLY M.D. (NPI 1023027927) is an individual infectious disease provider in Danville, Pennsylvania, licensed in Pennsylvania (MD463888) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Geisinger Medical Center, and maintains a secondary practice location in Rochester.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Mark A Shelly M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Mark Shelly reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Danville, PA 17822
- Reassigned Medicare billing, Pennsylvania enrollment
- 4,429 clinicians in this Medicare group
Muncy, PA 17756
- Reassigned Medicare billing, Pennsylvania enrollment
- 1,405 clinicians in this Medicare group
Rochester, NY 14620
- Reassigned Medicare billing, New York enrollment
- 303 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Geisinger Medical Center
Acute Care Hospitals · Danville, PAGeisinger-Lewistown Hospital
Acute Care Hospitals · Lewistown, PAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 17822 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DANVILLE, PA 17822
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 Mark Shelly's NPI number?
The NPI number for Mark Shelly is 1023027927. It was assigned to this individual provider in the NPPES registry on August 7, 2006.
Where is Mark Shelly located?
Mark Shelly practices at 100 N Academy Ave, Danville, PA 17822. The listed phone number is (570) 271-6408.
What is Mark Shelly's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Mark Shelly enrolled in Medicare?
Yes. Mark Shelly is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Mark Shelly's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Shelly reassigns Medicare benefits to 3 organizations: Geisinger Clinic (Danville, PA), Geisinger-Hm Joint Venture LLC (Muncy, PA) and Highland Hospital Of Rochester (Rochester, NY). Each 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 Mark Shelly's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Shelly accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Buckeye Health Plan list Mark Shelly 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.
Is Mark Shelly affiliated with any hospitals?
According to CMS data, Mark Shelly is affiliated with Geisinger Medical Center and Geisinger-Lewistown Hospital.
When was this NPI record last updated?
The NPPES record for Mark Shelly was last updated on August 31, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Dr. Mark A Shelly, M.D. · NPI 1023027927
Infectious Disease physician in Danville, Pennsylvania. Individual provider, active in the CMS NPPES registry since August 7, 2006.
## Identity
- **NPI:** 1023027927 (Entity type: Individual)
- **Enumerated:** August 7, 2006
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** MD463888 (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 N ACADEMY AVE, Danville, PA 17822
- **Phone:** (570) 271-6408 · **Fax:** (570) 271-5845
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Geisinger Clinic (NPI 1043405897, Danville, PA); Geisinger-Hm Joint Venture LLC (NPI 1952076119, Muncy, PA); Highland Hospital Of Rochester (NPI 1902221518, Rochester, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Jefferson Medical College Of Thomas Jefferson University, class of 1986
## Record status
- **NPPES last updated:** August 31, 2020
- **Other identifiers:** Medicaid 01143939 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1023027927) · Data from the CMS NPPES public registry.