Christina M. Tansy, MS, MMS, PA-C
NPI 1528252418ActiveIndividual· Physician Assistant· Colton, CA
Physician Assistant (MS, MMS, PA-C) with City of Hope Medical Foundation, practicing in Colton, California. Their prescriptions cost Medicare Part D more than their services did: $4,485,256 for 957 claims, against $11,955 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 42 companies reporting payments in 2025, $9,272 in all, mostly food and beverage. Lists Arrowhead Regional Medical Center as a hospital affiliation.
Overview
| NPI | 1528252418 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MS, MMS, PA-C |
| Sole proprietor | No |
| NPI issued | Sep 4, 2007 |
| Last updated in NPPES | Nov 13, 2020 |
| Certified by provider | Nov 13, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA19416 | CA |
| Physician Assistant, Medical | 363AM0700X | PA19416 | 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 - Physician Assistant (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 95 |
|---|---|
| Services billed | 242 across 7 procedure codes |
| Paid by Medicare | $11,955 |
Part D prescriptions in 2024
| Prescriptions (claims) | 957 · 1,111 30-day fills |
|---|---|
| Patients | 127 |
| Total drug cost | $4,485,256 |
| Generic share | 68% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- City of Hope Medical FoundationDuarte, CA · 982 clinicians
Hospital affiliation
- Arrowhead Regional Medical CenterColton, CA
Industry payments (Open Payments)
- 2025$9,272 · 336 payments from 42 companies
- 2024$7,877 · 318 payments from 46 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $1,105 | 53 |
| Janssen Biotech, Inc. | $881.09 | 31 |
| Merck Sharp & Dohme LLC | $521.46 | 18 |
| Astellas Pharma US Inc | $506.96 | 19 |
| Pfizer Inc. | $461.92 | 15 |
What the 2025 payments were for
- Food and Beverage$8,704 · 329 payments
- Education$568.50 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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