Ricardo Antonio Tan, MD
NPI 1255353629ActiveIndividual· Allergy & Immunology, Allergy· Los Angeles, CA
Allergy & Immunology, Allergy (MD) in Los Angeles, California, licensed in CA, with an NPI issued in July 2006. Their prescriptions cost Medicare Part D more than their services did: $504,437 for 1,449 claims, against $101,075 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 24 companies reporting payments in 2025, $4,003 in all, mostly food and beverage.
Overview
| NPI | 1255353629 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 24, 2006 |
| Last updated in NPPES | Mar 24, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology, Allergy Primary | 207KA0200X | A052236 | 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 - Allergy/Immunology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 111 |
|---|---|
| Services billed | 4,857 across 24 procedure codes |
| Paid by Medicare | $101,075 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,449 · 1,978 30-day fills |
|---|---|
| Patients | 212 |
| Total drug cost | $504,437 |
| Generic share | 67% of claims |
Education and affiliations
| Graduation year | 1986 |
|---|---|
| Medicare specialty | Allergy/Immunology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Other facilities
- United Hearts Hospice Health ServicesHospice · Simi Valley, CA
Industry payments (Open Payments)
- 2025$4,003 · 135 payments from 24 companies
- 2024$2,203 · 106 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $1,252 | 16 |
| Csl Behring | $413.09 | 22 |
| Genzyme Corporation | $310.28 | 10 |
| Regeneron Healthcare Solutions, Inc. | $253.46 | 13 |
| Astrazeneca Pharmaceuticals LP | $248.73 | 7 |
What the 2025 payments were for
- Food and Beverage$3,112 · 128 payments
- Travel and Lodging$860.31 · 5 payments
- Consulting Fee$15.80 · 1 payment
- Education$15.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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