James R. Nellen, MD
NPI 1174086748ActiveIndividual· Anesthesiology· Greenbrae, CA
Anesthesiology (MD) with Anesthesiology Consultants of Marin, practicing in Greenbrae, California. Medicare paid $37,898 for services to 242 patients in 2024. Fisher & Paykel Healthcare Inc was the largest of 2 companies reporting payments in 2025, $131.08 in all, mostly food and beverage. Lists Marinhealth Medical Center as a hospital affiliation.
Overview
| NPI | 1174086748 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 10, 2019 |
| Last updated in NPPES | Jun 10, 2024 |
| Certified by provider | Jun 10, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Anesthesiology Primary | 207L00000X | A194708 | CA |
| Anesthesiology | 207L00000X | 75283 | WI |
| Anesthesiology, Pain Medicine | 207LP2900X | 75283 | WI |
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 - Anesthesiology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 242 |
|---|---|
| Services billed | 301 across 62 procedure codes |
| Paid by Medicare | $37,898 |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Anesthesiology |
Medical group
- Anesthesiology Consultants of MarinGreenbrae, CA · 32 clinicians
Hospital affiliation
- Marinhealth Medical CenterGreenbrae, CA
Industry payments (Open Payments)
- 2025$131.08 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Fisher & Paykel Healthcare Inc | $99.55 | 1 |
| Stryker Corporation | $31.53 | 1 |
What the 2025 payments were for
- Food and Beverage$131.08 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other anesthesiologists in Greenbrae
- 1265544654
- 1124647235
- 1184086993
- 1457458606
- 1487691143
- 1497914006
- 1568566750
- 1578906665
- 1598893232
- 1639281751
- 1649361437
- 1710173026
All 48 anesthesiologists in Greenbrae · All anesthesiologists in California