DR. GILLIAN SLOANE MAYERSOHN (PSY.D., ABPP) – Clinical Psychologist, NPI 1265917884
Clinical Psychologist
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
449 CLINICAL PSYCHOLOGIST in MO
Provider Addresses for DR. GILLIAN SLOANE MAYERSOHN (PSY.D., ABPP)
1 CHILDRENS PL STE 3N14
SAINT LOUIS, MO 631101002
Phone: (314) 454-6069
Type: Mailing
3800 Park Ave Fl 2
Saint Louis, MO 631102514
Phone: (314) 577-5667
Fax: (314) 268-2784
Type: Location
1465 S GRAND BLVD
SAINT LOUIS, MO 631041003
Phone: (314) 577-5667
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.
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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: 2019-01-10
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 |
|---|---|---|---|---|
| I20190110000785 | I | Clinical Psychologist | MO | 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 63110)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | MO | |
| Diagnostic Radiology | MO | |
| Diagnostic Radiology | MO | |
| - | MO | |
| Nurse Practitioner | MO | |
| P S Y C H I A T R Y | MO | |
| Radiation Oncology | MO | |
| Physician Assistant | MO | |
| Diagnostic Radiology | MO | |
| Clinical Psychologist | MO |
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