Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mr. Donald L. Tressler, PA-C

Individual provider Physician Assistant · NPI 1518915107

Mr. Donald L. Tressler, PA-C is a Physician Assistant in Middleburg, Pennsylvania. Qualified in 2004, 22 years ago. Practices with Liberty Med Associates LLC, an 11-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
22
Licensed in
PA
In the registry since
2006
Specialties on file
2
What do these letters mean?
PA-C — Physician Assistant, Certified
A physician assistant who holds current national certification.

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Practice location Address checks out

7 Dock Hill Rd
Middleburg, PA 17842-8910 Not confirmed with CMS for 17 years — call before visiting
Phone: (570) 837-2123
Fax: (570) 837-2185
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Medical Physician Assistant (primary) Taxonomy 363AM0700X · Licence MA051971 (PA)
Physician Assistant Taxonomy 363A00000X · Licence OA002220 (PA)

Record details

NPI number1518915107
Entity typeIndividual (Type 1)
GenderMale
Credentials PA-C
Sole proprietorYes
NPI enumeratedMay 5, 2006
Last updated in NPPESDecember 30, 2008

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2004 (22 years in practice)
Group practice Liberty Med Associates Llc — 11 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients52
Services billed 89 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Liberty Med Associates LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 11 clinicians in the practice; 5 are shown here.

Other providers in Middleburg