Grace Gia-Ling Wong Casserly, MD
NPI 1154735587ActiveIndividual· Internal Medicine· Halethorpe, MD
Internal Medicine (MD) in Halethorpe, Maryland, trained at University of Southern California Keck School of Medicine (class of 2014). Their prescriptions cost Medicare Part D more than their services did: $480,030 for 6,669 claims, against $139,721 paid for services in 2024. Cochlear Americas reported $136.25 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1154735587 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 13, 2014 |
| Last updated in NPPES | Aug 21, 2020 |
| Certified by provider | Aug 21, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | D0083021 | MD |
| Internal Medicine | 207R00000X | A169212 | CA |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 720 |
|---|---|
| Services billed | 2,767 across 55 procedure codes |
| Paid by Medicare | $139,721 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,669 · 17,037 30-day fills |
|---|---|
| Patients | 710 |
| Total drug cost | $480,030 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Montage Medical GroupMonterey, CA · 127 clinicians
Hospital affiliations
- Community Hospital of the Monterey PeninsulaMonterey, CA
- Salinas Valley Health Medical CenterSalinas, CA
- Stanford Health CareStanford, CA
Other facilities
- Central Coast Vna & Hospice, IncHome health agency · Monterey, CA
- Premier Home Health Providers Inc.Home health agency · San Jose, CA
Industry payments (Open Payments)
- 2025$136.25 · 1 payment from 1 company
- 2024$307.07 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Cochlear Americas | $136.25 | 1 |
What the 2025 payments were for
- Food and Beverage$136.25 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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