Theodore Robertson Pak, MD, PHD
NPI 1013476100ActiveIndividual· Internal Medicine, Infectious Disease· Orange, CA
Internal Medicine, Infectious Disease (MD, PHD) in Orange, California, trained at Icahn School of Medicine at Mount Sinai (class of 2019). Their prescriptions cost Medicare Part D more than their services did: $64,885 for 106 claims, against $4,150 paid for services in 2024.
Overview
| NPI | 1013476100 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, PHD |
| Sole proprietor | No |
| NPI issued | Mar 18, 2019 |
| Last updated in NPPES | Jan 9, 2026 |
| Certified by provider | Jan 9, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | A203241 | CA |
| Internal Medicine, Infectious Disease | 207RI0200X | 291119 | MA |
| Internal Medicine | 207R00000X | 291119 | MA |
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 - Infectious Disease (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 19 |
|---|---|
| Services billed | 42 across 6 procedure codes |
| Paid by Medicare | $4,150 |
Part D prescriptions in 2024
| Prescriptions (claims) | 106 · 133 30-day fills |
|---|---|
| Patients | 18 |
| Total drug cost | $64,885 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | Icahn School of Medicine at Mount Sinai |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Infectious Disease |
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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All 24 infectious disease specialists in Orange · All infectious disease specialists in California