Emir Barbaros Safak Guven, MD
NPI 1366493181ActiveIndividual· Internal Medicine· Greenbrae, CA
Internal Medicine (MD) with The Duluth Clinic Ltd, practicing in Greenbrae, California. Their prescriptions cost Medicare Part D more than their services did: $335,341 for 817 claims, against $21,890 paid for services in 2024. Chiesi USA, Inc. was the largest of 15 companies reporting payments in 2025, $852.81 in all, mostly food and beverage. Lists Essentia Health Deer River and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1366493181 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 15, 2006 |
| Last updated in NPPES | Sep 30, 2026 |
| Certified by provider | Sep 30, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A86174 | CA |
| Internal Medicine, Endocrinology, Diabetes & Metabolism | 207RE0101X | 12601 | NV |
| Internal Medicine, Endocrinology, Diabetes & Metabolism | 207RE0101X | MD61232874 | WA |
| Internal Medicine, Endocrinology, Diabetes & Metabolism | 207RE0101X | 33942 | 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 - Endocrinology (IL); Practitioner - Endocrinology (MN); Practitioner - Endocrinology (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 221 |
|---|---|
| Services billed | 360 across 8 procedure codes |
| Paid by Medicare | $21,890 |
Part D prescriptions in 2024
| Prescriptions (claims) | 817 · 1,575 30-day fills |
|---|---|
| Patients | 181 |
| Total drug cost | $335,341 |
| Generic share | 41% of claims |
Education and affiliations
| Graduation year | 1989 |
|---|---|
| Medicare specialty | Endocrinology |
| Telehealth | Offers telehealth |
Medical group
- The Duluth Clinic LtdHermantown, MN · 1,144 clinicians
Hospital affiliations
- Essentia Health Deer RiverDeer River, MN
- Essentia Health DuluthDuluth, MN
- St Marys Hospital SuperiorSuperior, WI
Industry payments (Open Payments)
- 2025$852.81 · 25 payments from 15 companies
- 2024$259.11 · 9 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Chiesi USA, Inc. | $194.71 | 3 |
| Tandem Diabetes Care, Inc. | $125.00 | 2 |
| Neurocrine Biosciences, Inc. | $85.90 | 1 |
| Lilly USA, LLC | $73.98 | 3 |
| Astrazeneca Pharmaceuticals LP | $63.64 | 1 |
What the 2025 payments were for
- Food and Beverage$852.81 · 25 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 33 internal medicine physicians in Greenbrae · All internal medicine physicians in California