Ileana M. Pat, MD
NPI 1598775538ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· West Hills, CA
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) in West Hills, California, licensed in CA, with an NPI issued in August 2006. Their prescriptions cost Medicare Part D more than their services did: $626,964 for 824 claims, against $14,922 paid for services in 2024. Xeris Pharmaceuticals, Inc. was the largest of 6 companies reporting payments in 2025, $276.91 in all, mostly food and beverage.
Overview
| NPI | 1598775538 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 9, 2006 |
| Last updated in NPPES | Sep 8, 2025 |
| Certified by provider | Sep 8, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | A69940 | 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 - Endocrinology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 78 |
|---|---|
| Services billed | 206 across 3 procedure codes |
| Paid by Medicare | $14,922 |
Part D prescriptions in 2024
| Prescriptions (claims) | 824 · 1,421 30-day fills |
|---|---|
| Patients | 99 |
| Total drug cost | $626,964 |
| Generic share | 48% of claims |
Education and affiliations
| Graduation year | 1983 |
|---|---|
| Medicare specialty | Endocrinology |
| Telehealth | Offers telehealth |
Industry payments (Open Payments)
- 2025$276.91 · 13 payments from 6 companies
- 2024$829.93 · 41 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Xeris Pharmaceuticals, Inc. | $96.81 | 5 |
| Abbott Laboratories | $70.19 | 3 |
| Medtronic, Inc. | $63.97 | 2 |
| Mannkind Corporation | $17.08 | 1 |
| Amgen Inc. | $15.38 | 1 |
What the 2025 payments were for
- Food and Beverage$276.91 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other endocrinologists in West Hills
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