Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Casey Lynn Seitz Berrettini, PA-C

Individual provider Physician Assistant · NPI 1518426139

Casey Lynn Seitz Berrettini, PA-C is a Physician Assistant in Lititz, Pennsylvania. Graduated from University of Nebraska College of Medicine in 2018, 8 years ago. Practices with Wellspan Medical Group, a 2,342-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Delaware and Pennsylvania.

Years since qualifying
8
Trained at
University of Nebraska College of Medicine
Licensed in
DE, PA
In the registry since
2019
Specialties on file
3
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

151 Koser Rd
Lititz, PA 17543-7602
Phone: (717) 839-5466
Fax: (717) 798-3347
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 20797 Professional Park Blvd, Georgetown, DE 19947-3198 — (302) 515-1708
  • 116 Interstate Pkwy, Bradford, PA 16701-1036 — (814) 368-4143
  • 735 Norman Dr, Lebanon, PA 17042-7559 — (717) 270-7908

Specialties & licences

Medical Physician Assistant (primary) Taxonomy 363AM0700X · Licence MA060546 (PA)
Physician Assistant Taxonomy 363A00000X · Licence MA060546 (PA)
Medical Physician Assistant Taxonomy 363AM0700X · Licence C5-0012139 (DE)

Record details

NPI number1518426139
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA-C
Sole proprietorNo
NPI enumeratedMarch 13, 2019
Last updated in NPPESMay 6, 2025
Certification dateMay 6, 2025

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolUNIVERSITY OF NEBRASKA COLLEGE OF MEDICINE
Graduated 2018 (8 years in practice)
Group practice Wellspan Medical Group — 2342 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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 patients59
Services billed 84 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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 Wellspan Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2342 clinicians in the practice; 12 are shown here.

Other providers in Lititz