DR. DIANE SIZER (PH.D.) – Psychologist, NPI 1265478259
Psychologist
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,669 CLINICAL PSYCHOLOGIST in PA
Provider Addresses for DR. DIANE SIZER (PH.D.)
928 Jaymor Rd Ste B-150
Southampton, PA 189663853
Phone: (856) 745-9579
Fax: (215) 938-7607
Type: Location
2901 FRANKS RD
SUITE 1
HUNTINGDON VALLEY, PA 190064214
Phone: (215) 947-8654
Fax: (215) 938-7607
Type: Mailing
928 JAYMOR RD STE B-150
SOUTHAMPTON, PA 189663853
Phone: (215) 947-8654
Fax: (215) 938-7607
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: 2017-12-11
PECOS data refreshed: 2026-05-27
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 |
|---|---|---|---|---|
| I20171211002715 | I | Clinical Psychologist | 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 18966)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | PA | |
| Mental Health Counselor | PA | |
| Clinical Social Worker | PA | |
| Clinical Psychologist | PA | |
| Nurse Practitioner | PA | |
| - | NJ | |
| - | PA | |
| Clinical Social Worker | PA | |
| P S Y C H I A T R Y | PA | |
| - | PA |
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