DR. JOHN J MESSMER MD
NPI 1669437414
Family Medicine in Palmyra, PA
About Dr. John J Messmer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN J MESSMER MD (NPI 1669437414) is an individual family medicine provider in Palmyra, Pennsylvania, licensed in Pennsylvania (MD020821E) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS, is affiliated with Wellspan Good Samaritan Hospital, and is a graduate of Pennsylvania State University College Of Medicine (1977).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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. John J Messmer Md 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 Reassignment
Medicare enrollment records show John Messmer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Hershey, PA 17033
- Reassigned Medicare billing, Pennsylvania enrollment
- 2,216 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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Wellspan Good Samaritan Hospital
Acute Care Hospitals · Lebanon, PAUpmc Pinnacle Hospitals
Acute Care Hospitals · Harrisburg, PAMilton S Hershey Medical Center
Acute Care Hospitals · Hershey, PAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 17078 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.
Referred Medical Equipment & Supplies CMS DME claims 2
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 15
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 John Messmer's NPI number?
The NPI number for John Messmer is 1669437414. It was assigned to this individual provider in the NPPES registry on April 17, 2006.
Where is John Messmer located?
John Messmer practices at 941 Park Dr, Palmyra, PA 17078. The listed phone number is (800) 233-4082.
What is John Messmer's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is John Messmer enrolled in Medicare?
Yes. John Messmer 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 organization bills Medicare for John Messmer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Messmer reassigns Medicare benefits to The Milton S Hershey Medical Center Physicians Group (Hershey, PA). The 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 John Messmer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is John Messmer affiliated with any hospitals?
According to CMS data, John Messmer is affiliated with Wellspan Good Samaritan Hospital, Upmc Pinnacle Hospitals and Milton S Hershey Medical Center.
When was this NPI record last updated?
The NPPES record for John Messmer was last updated on November 16, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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. John J Messmer, MD · NPI 1669437414
Family Medicine physician in Palmyra, Pennsylvania. Individual provider, active in the CMS NPPES registry since April 17, 2006.
## Identity
- **NPI:** 1669437414 (Entity type: Individual)
- **Enumerated:** April 17, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** MD020821E (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 941 PARK DR, Palmyra, PA 17078-3445
- **Phone:** (800) 233-4082
## 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:** The Milton S Hershey Medical Center Physicians Group (NPI 1205801537, Hershey, PA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Pennsylvania State University College Of Medicine, class of 1977
## Record status
- **NPPES last updated:** November 16, 2009
- **Other identifiers:** Medicaid 0010533300007 (PA); Medicare UPIN C33330; Medicare ID-Type Unspecified 197715
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Source: [NPI Profile](https://npiprofile.com/npi/1669437414) · Data from the CMS NPPES public registry.