NELS C GUNNARSEN M.D.
NPI 1821193160
Radiology - Diagnostic Radiology in Danville, PA
About Nels C Gunnarsen M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NELS C GUNNARSEN M.D. (NPI 1821193160) is an individual diagnostic radiology provider in Danville, Pennsylvania, licensed in North Carolina (2026-02213) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Sartori Memorial Hospital, Inc, and maintains a secondary practice location in Rocky Mount.
NPPES Registry Identity
Specialties & Licenses
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
Nels C Gunnarsen 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
9Medicare enrollment records show Nels Gunnarsen reassigns Medicare billing to 9 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
Sellersville, PA 18960
- Reassigned Medicare billing, Pennsylvania enrollment
- 42 clinicians in this Medicare group
Philadelphia, PA 19148
- Reassigned Medicare billing, Texas enrollment
- 9 clinicians in this Medicare group
Erie, PA 16550
- Reassigned Medicare billing, Pennsylvania enrollment
- 962 clinicians in this Medicare group
Worcester, MA 01608
- Reassigned Medicare billing, Texas enrollment
- 3 clinicians in this Medicare group
Columbus, OH 43214
- Reassigned Medicare billing, Texas enrollment
- 15 clinicians in this Medicare group
Fort Worth, TX 76107
- Reassigned Medicare billing, Texas enrollment
- 445 clinicians in this Medicare group
Shenandoah, TX 77380
- Reassigned Medicare billing, Texas enrollment
- 1,278 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 7
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Sartori Memorial Hospital, Inc
Acute Care Hospitals · Cedar Falls, IAMercyone Waterloo Medical Center
Acute Care Hospitals · Waterloo, IAMercyone Oelwein Medical Center
Critical Access Hospitals · Oelwein, IAPhysician 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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 Nels Gunnarsen's NPI number?
The NPI number for Nels Gunnarsen is 1821193160. It was assigned to this individual provider in the NPPES registry on September 13, 2006.
Where is Nels Gunnarsen located?
Nels Gunnarsen practices at 100 N Academy Ave, Danville, PA 17822. The listed phone number is (570) 271-6301.
What is Nels Gunnarsen's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Nels Gunnarsen enrolled in Medicare?
Yes. Nels Gunnarsen 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 Nels Gunnarsen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nels Gunnarsen reassigns Medicare benefits to 9 organizations: Geisinger Clinic (Danville, PA), Geisinger-Hm Joint Venture LLC (Muncy, PA), Grandview Radiology Associates (Sellersville, PA), Methodist Associates In Healthcare, Inc (Philadelphia, PA), Regional Health Services Inc (Erie, PA) and 4 more organizations, listed in the Medicare section above. 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 Nels Gunnarsen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Nels Gunnarsen accept?
Health plans from Blue Cross and Blue Shield of Texas, Sendero Health Plans, Local Nonprofit and Wellmark Health Plan of Iowa, Inc. list Nels Gunnarsen 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 Nels Gunnarsen affiliated with any hospitals?
According to CMS data, Nels Gunnarsen is affiliated with Sartori Memorial Hospital, Inc, Mercyone Waterloo Medical Center and Mercyone Oelwein Medical Center.
When was this NPI record last updated?
The NPPES record for Nels Gunnarsen was last updated on October 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 days 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.
# Nels C Gunnarsen, M.D. · NPI 1821193160
Diagnostic Radiology physician in Danville, Pennsylvania. Individual provider, active in the CMS NPPES registry since September 13, 2006.
## Identity
- **NPI:** 1821193160 (Entity type: Individual)
- **Enumerated:** September 13, 2006
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** 2026-02213 (North Carolina)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 N ACADEMY AVE, Danville, PA 17822-9800
- **Phone:** (570) 271-6301 · **Fax:** (570) 271-5976
## 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:** 9 organizations under Medicare reassignment (form CMS-855R): Geisinger Clinic (NPI 1184675613, Danville, PA); Geisinger-Hm Joint Venture LLC (NPI 1952076119, Muncy, PA); Grandview Radiology Associates (NPI 1922066836, Sellersville, PA); Methodist Associates In Healthcare, Inc (NPI 1053355131, Philadelphia, PA); Regional Health Services Inc (NPI 1174520654, Erie, PA); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1990
## Record status
- **NPPES last updated:** October 9, 2026
- **Other identifiers:** Other G87827 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1821193160) · Data from the CMS NPPES public registry.