Dennis William Delpaine, MD
NPI 1851452213ActiveIndividual· Allergy & Immunology· Stockton, CA
Allergy & Immunology (MD) in Stockton, California, trained at University of California, Davis School of Medicine (class of 1977). Their prescriptions cost Medicare Part D more than their services did: $2,476,802 for 5,797 claims, against $607,722 paid for services in 2024. Abbvie Inc. was the largest of 15 companies reporting payments in 2025, $1,419 in all, mostly food and beverage.
Overview
| NPI | 1851452213 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Dec 12, 2006 |
| Last updated in NPPES | Mar 13, 2020 |
| Certified by provider | Mar 13, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | G37345 | CA |
| Internal Medicine, Rheumatology | 207RR0500X | G37345 | 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 - Rheumatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 491 |
|---|---|
| Services billed | 56,602 across 36 procedure codes |
| Paid by Medicare | $607,722 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,797 · 10,087 30-day fills |
|---|---|
| Patients | 573 |
| Total drug cost | $2,476,802 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | University of California, Davis School of Medicine |
|---|---|
| Graduation year | 1977 |
| Medicare specialty | Rheumatology |
| Secondary specialties | Allergy/Immunology, Internal Medicine |
Hospital affiliations
- Adventist Health SonoraSonora, CA
- St Joseph's Medical Center of StocktonStockton, CA
Industry payments (Open Payments)
- 2025$1,419 · 75 payments from 15 companies
- 2024$2,351 · 116 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $277.06 | 21 |
| Amgen Inc. | $232.29 | 12 |
| Glaxosmithkline, LLC. | $224.70 | 15 |
| Novartis Pharmaceuticals Corporation | $135.88 | 7 |
| Pfizer Inc. | $110.86 | 5 |
What the 2025 payments were for
- Food and Beverage$1,388 · 73 payments
- Education$30.54 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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