Steven Jerome McAllen, M.D.
NPI 1821081043ActiveIndividual· Internal Medicine· Templeton, CA
Internal Medicine (M.D.) in Templeton, California, trained at University of California, San Diego School of Medicine (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $1,063,067 for 8,070 claims, against $126,553 paid for services in 2024. Amgen Inc. was the largest of 7 companies reporting payments in 2025, $613.48 in all, mostly food and beverage.
Overview
| NPI | 1821081043 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 23, 2005 |
| Last updated in NPPES | Mar 1, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G061667 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,799 |
|---|---|
| Services billed | 4,149 across 53 procedure codes |
| Paid by Medicare | $126,553 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,070 · 19,933 30-day fills |
|---|---|
| Patients | 584 |
| Total drug cost | $1,063,067 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of California, San Diego School of Medicine |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- David B. HammerTempleton, CA · 123 clinicians
Hospital affiliations
- Adventist Health Sierra VistaSan Luis Obispo, CA
- Adventist Health Twin CitiesTempleton, CA
- French Hospital Medical CenterSan Luis Obispo, CA
- Santa Barbara Cottage HospitalSanta Barbara, CA
Other facilities
- Central Coast Home Health IncHome health agency · San Luis Obispo, CA
- Dignity Health Home HealthHome health agency · Santa Maria, CA
Industry payments (Open Payments)
- 2025$613.48 · 21 payments from 7 companies
- 2024$679.86 · 36 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $223.70 | 3 |
| Pfizer Inc. | $124.06 | 6 |
| Glaxosmithkline, LLC. | $101.66 | 5 |
| Novo Nordisk Inc | $68.43 | 3 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $49.57 | 2 |
What the 2025 payments were for
- Food and Beverage$438.48 · 20 payments
- Consulting Fee$175.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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