Catherine Diamond, MD
NPI 1649350786ActiveIndividual· Internal Medicine, Infectious Disease· Orange, CA
Internal Medicine, Infectious Disease (MD) in Orange, California, trained at Albany Medical College of Union University (class of 1991). Their prescriptions cost Medicare Part D more than their services did: $5,667,649 for 5,190 claims, against $36,824 paid for services in 2024.
Overview
| NPI | 1649350786 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 16, 2006 |
| Last updated in NPPES | Apr 8, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | 000000G84863 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 189 |
|---|---|
| Services billed | 484 across 15 procedure codes |
| Paid by Medicare | $36,824 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,190 · 5,800 30-day fills |
|---|---|
| Patients | 129 |
| Total drug cost | $5,667,649 |
| Generic share | 66% of claims |
Education and affiliations
| Medical school | Albany Medical College of Union University |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Infectious Disease |
| Telehealth | Offers telehealth |
Medical group
- Uc RegentsOrange, CA · 319 clinicians
Hospital affiliation
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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