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GREENCASTLE FAMILY PRACTICE PC
NPI 1629009295
Family Medicine in Greencastle, PA

Active since July 05, 2006CLIA 39D0187033 · Microscopy
50 EASTERN AVE, STE 135, GREENCASTLE, PA 17225(717) 597-3151(717) 597-8933 Get Directions Write a Review

NPPES record last updated: January 24, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 29, 2023, Jan 12, 2023, Dec 30, 2016 (3 updates tracked since 2016).

About Greencastle Family Practice Pc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GREENCASTLE FAMILY PRACTICE PC (NPI 1629009295) is a healthcare organization registered as a family medicine in Greencastle, Pennsylvania and active in the NPI registry since July 2006. The organization holds a CLIA Microscopy certificate valid through June 19, 2028 and lists Jenniffer Lee Showalter, Executive Assistant, as its authorized official.

NPPES Registry Identity

NPI1629009295
Entity TypeOrganization
Primary Taxonomy207Q00000X
Legal Business NameGREENCASTLE FAMILY PRACTICE PC
Location Address50 EASTERN AVE, STE 135Greencastle, PA 17225-1100
Mailing Address50 Eastern Ave, Ste 135Greencastle, PA 17225-1100 · (717) 597-3151 · Fax (717) 597-8933
Phone(717) 597-3151
Fax(717) 597-8933
Organization SubpartNo
Authorized OfficialJenniffer Lee ShowalterExecutive Assistant · (223) 465-2025
Enumeration DateJuly 5, 2006
Last NPPES UpdateJanuary 24, 20253 updates tracked since enumeration
NPPES CertifiedJanuary 24, 2025
✔ NPI 1629009295 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Also ListedCounselorTaxonomy 101Y00000X
Also ListedPsychologistTaxonomy 103T00000X
Also ListedSocial WorkerTaxonomy 104100000X
50 EASTERN AVE, Greencastle, PA 17225
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Other Identifiers 1

Medicaid10744525PA

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Greencastle Family Practice Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

11

Medicare enrollment records show 11 clinicians reassign Medicare billing to Greencastle Family Practice PC, which bills Medicare for the services they deliver. Of these, 8 practice at this address. They are listed nearest first.

Clinicians by Medicare Specialty 4

Mental Health Counselor5
Family Practice3
Clinical Social Worker2
Nurse Practitioner1

Clinicians, nearest first (11)

Nathan Derstine, D.O.
Family Practice
NPI 1265411821
50 EASTERN AVE STE. 135
Greencastle, PA 17225
(717) 597-3151
✔ PECOS✔ Accepts MedicareSame address
Duane Sipes, M.D.
Family Practice
NPI 1346229945
50 EASTERN AVE STE 135
Greencastle, PA 17225
(717) 597-3151
✔ PECOS✔ Accepts MedicareSame address
Amy Whorley, M.S., L.P.C.
Mental Health Counselor
NPI 1326329160
50 EASTERN AVE
Greencastle, PA 17225
(717) 597-0095
✔ PECOS✔ Accepts MedicareSame address
Paul Bitner, MS,LPC
Mental Health Counselor
NPI 1023034527
50 EASTERN AVE STE 135,
Greencastle, PA 17225
(717) 597-3151
✔ PECOS✔ Accepts MedicareSame address
Michael Fitzpatrick, D.O.
Family Practice
NPI 1043233695
50 EASTERN AVE
Greencastle, PA 17225
(717) 597-3151
✔ PECOS✔ Accepts MedicareSame address
Nancy Morton, MSW,LCSW
Clinical Social Worker
NPI 1699795278
50 EASTERN AVE STE 135
Greencastle, PA 17225
(717) 597-3151
✔ PECOS✔ Accepts MedicareSame address
Cheryl Sears, LPC
Mental Health Counselor
NPI 1811367279
50 EASTERN AVE SUITE 135
Greencastle, PA 17225
(717) 597-0095
✔ PECOS✔ Accepts MedicareSame address
Diane Swan
Mental Health Counselor
NPI 1386875169
50 EASTERN AVE SUITE 135
Greencastle, PA 17225
(717) 597-3151
✔ PECOS✔ Accepts MedicareSame address
Melissa Grove, LPC
Mental Health Counselor
NPI 1376877050
176 S COLDBROOK AVE UNIT 2
Chambersburg, PA 17201
(717) 267-7480
✔ PECOS✔ Accepts Medicare11 mi
Barbara Larew Adams, LCSW
Clinical Social Worker
NPI 1134324718
110 CHAMBERS HILL DR
Chambersburg, PA 17201
(717) 709-7930
✔ PECOS✔ Accepts Medicare12 mi
Mindy Barnhart, CRNP
Nurse Practitioner
NPI 1770971251
455 S WASHINGTON ST STE 12
Gettysburg, PA 17325
(717) 339-2875
✔ PECOS✔ Accepts Medicare26 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate for Provider-Performed Microscopy Procedures (PPMP) 39D0187033

Greencastle Family Practice PC · Greencastle, PA
Active · expires Jun 19, 2028
CLIA Number39D0187033
Laboratory TypePhysician Office
Certificate Effective DateJune 20, 2026
Certificate Expiration DateJune 19, 2028
Laboratory DirectorNathan Derstine Do
Laboratory Phone(717) 597-3151
Laboratory LocationGreencastle Family Practice PC50 Eastern Ave Suite 135, Greencastle, PA 17225
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform waived tests.

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 Greencastle Family Practice PC's NPI number?

The NPI number for Greencastle Family Practice PC is 1629009295. It was assigned to this organization in the NPPES registry on July 5, 2006.

Where is Greencastle Family Practice PC located?

Greencastle Family Practice PC is located at 50 Eastern Ave Ste 135, Greencastle, PA 17225. The listed phone number is (717) 597-3151.

What is Greencastle Family Practice PC's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Greencastle Family Practice PC enrolled in Medicare?

Yes. Greencastle Family Practice PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Greencastle Family Practice PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 11 clinicians in 4 Medicare specialties reassign their Medicare billing to Greencastle Family Practice PC. A 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 the clinician's services. The largest specialties are Mental Health Counselor (5), Family Practice (3) and Clinical Social Worker (2). Of these, 8 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Greencastle Family Practice PC hold a CLIA laboratory certificate?

Yes. A Certificate for Provider-Performed Microscopy Procedures (PPMP) (number 39D0187033) is associated with this NPI, valid through June 19, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Greencastle Family Practice PC was last updated on January 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months 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.