Ameer Almullahassani, MD
NPI 1245473131ActiveIndividual· Psychiatry & Neurology, Neurology· Fairfield, CA
Psychiatry & Neurology, Neurology (MD) with Northbay Physicians Surgery Center, LLC and 1 other group, practicing in Fairfield, California. Their prescriptions cost Medicare Part D more than their services did: $820,846 for 4,322 claims, against $511,757 paid for services in 2024. Abbvie Inc. was the largest of 6 companies reporting payments in 2025, $799.75 in all, mostly food and beverage. Lists Northbay Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1245473131 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 8, 2009 |
| Last updated in NPPES | Feb 26, 2026 |
| Certified by provider | Feb 26, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology Primary | 2084N0400X | MD-38285 | IA |
| Psychiatry & Neurology, Neurology | 2084N0400X | E-19927 | AR |
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 - Neurology (AR); Practitioner - Neurology (CA); Practitioner - Neurology (GA); Practitioner - Neurology (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,256 |
|---|---|
| Services billed | 48,749 across 48 procedure codes |
| Paid by Medicare | $511,757 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,322 · 9,301 30-day fills |
|---|---|
| Patients | 623 |
| Total drug cost | $820,846 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Neurology |
| Telehealth | Offers telehealth |
Medical groups
- Northbay Physicians Surgery Center, LLCFairfield, CA · 324 clinicians
- Northbay Health Medical FoundationFairfield, CA · 213 clinicians
Hospital affiliations
- Northbay Medical CenterFairfield, CA
- Sutter Medical Center, SacramentoSacramento, CA
Other facilities
- Healthflex Home Health ServicesHome health agency · Oakland, CA
- Silverline Staff Home HealthHome health agency · Fremont, CA
Industry payments (Open Payments)
- 2025$799.75 · 37 payments from 6 companies
- 2024$1,978 · 79 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $527.19 | 24 |
| Pfizer Inc. | $162.57 | 8 |
| Mdd US Operations, LLC | $55.24 | 2 |
| Jazz Pharmaceuticals Inc. | $22.39 | 1 |
| Amneal Pharmaceuticals LLC | $18.48 | 1 |
What the 2025 payments were for
- Food and Beverage$799.75 · 37 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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