CALLISTA O'BRIEN (PA-C) – Physician Assistant, NPI 1023848140
Physician Assistant
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
9,738 PHYSICIAN ASSISTANT in PA
Provider Addresses for CALLISTA O'BRIEN (PA-C)
500 UNIVERSITY DR
MC CA410
HERSHEY, PA 170332360
Phone: (800) 243-1455
Type: Mailing
4301 5TH STREET HWY
TEMPLE, PA 195601739
Phone: (610) 208-8801
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2024-09-09
PECOS data refreshed: 2026-06-15
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20240909000512 | I | Physician Assistant | PA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 17033)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | FL | |
| Physician Assistant | CA | |
| Hospitalist, Internal Medicine | PA | |
| A N E S T H E S I O L O G Y | PA | |
| Hospice/Palliative Care, Family Practice | PA | |
| Anesthesiology, Pain Management | PA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | PA | |
| Certified Registered Nurse Anesthetist (Crna) | PA | |
| Certified Registered Nurse Anesthetist (Crna) | PA | |
| Nurse Practitioner | PA |
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