Gillian Sloane Mayersohn, PSY.D., ABPP
NPI 1265917884ActiveIndividual· Psychologist, Clinical· Saint Louis, MO
Psychologist, Clinical (PSY.D., ABPP) with Ssm Cardinal Glennon Children's Hospital, practicing in Saint Louis, Missouri. Medicare paid $1,995 for services to 11 patients in 2024. Lists Ssm Health St Mary's Hospital - St Louis as a hospital affiliation.
Overview
| NPI | 1265917884 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PSY.D., ABPP |
| Sole proprietor | No |
| NPI issued | Sep 28, 2018 |
| Last updated in NPPES | Apr 28, 2025 |
| Certified by provider | Apr 28, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychologist, Clinical Primary | 103TC0700X | 2018033534 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Clinical Psychologist (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 11 |
|---|---|
| Services billed | 40 across 7 procedure codes |
| Paid by Medicare | $1,995 |
Education and affiliations
| Graduation year | 2017 |
|---|---|
| Medicare specialty | Clinical Psychologist |
Medical group
- Ssm Cardinal Glennon Children's HospitalSaint Louis, MO · 34 clinicians
Hospital affiliation
- Ssm Health St Mary's Hospital - St LouisSaint Louis, MO
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All 273 clinical psychologists in Saint Louis · All clinical psychologists in Missouri