Immanuel Atienza Asuncion, M.D.
NPI 1245254580ActiveIndividual· Family Medicine· San Pablo, CA
Family Medicine (M.D.) in San Pablo, California, trained at University of California, Davis School of Medicine (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $256,830 for 4,668 claims, against $61,359 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 12 companies reporting payments in 2025, $1,041 in all, mostly food and beverage.
Overview
| NPI | 1245254580 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 27, 2006 |
| Last updated in NPPES | Mar 11, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | A89792 | 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 - Family Practice (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 162 |
|---|---|
| Services billed | 928 across 34 procedure codes |
| Paid by Medicare | $61,359 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,668 · 12,510 30-day fills |
|---|---|
| Patients | 399 |
| Total drug cost | $256,830 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | University of California, Davis School of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Family Practice |
| Secondary specialties | General Practice |
| Telehealth | Offers telehealth |
Medical group
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Other facilities
- American Home Health Care, LLCHome health agency · Dublin, CA
Industry payments (Open Payments)
- 2025$1,041 · 44 payments from 12 companies
- 2024$908.93 · 40 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $259.97 | 11 |
| Glaxosmithkline, LLC. | $216.66 | 5 |
| Novo Nordisk Inc | $91.84 | 5 |
| Lilly USA, LLC | $90.37 | 5 |
| Edwards Lifesciences Corporation | $71.35 | 3 |
What the 2025 payments were for
- Food and Beverage$1,041 · 44 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 21 family medicine physicians in San Pablo · All family medicine physicians in California