Mahnaz Mellati, M.D.
NPI 1326331513ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Seattle, WA
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) in Seattle, Washington, licensed in WA, with an NPI issued in May 2011. Their prescriptions cost Medicare Part D more than their services did: $595,912 for 1,317 claims, against $53,241 paid for services in 2024. Tandem Diabetes Care, Inc. was the largest of 4 companies reporting payments in 2025, $27,112 in all, mostly speaking and faculty fees. Lists Island Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1326331513 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 19, 2011 |
| Last updated in NPPES | Oct 9, 2024 |
| Certified by provider | Oct 9, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | MD 60443675 | WA |
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 (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 224 |
|---|---|
| Services billed | 782 across 9 procedure codes |
| Paid by Medicare | $53,241 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,317 · 3,391 30-day fills |
|---|---|
| Patients | 227 |
| Total drug cost | $595,912 |
| Generic share | 51% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Endocrinology |
| Telehealth | Offers telehealth |
Hospital affiliations
- Island HospitalAnacortes, WA
- Olympic Medical CenterPort Angeles, WA
- St Michael Medical CenterSilverdale, WA
- Swedish Edmonds HospitalEdmonds, WA
- Swedish Medical CenterSeattle, WA
Industry payments (Open Payments)
- 2025$27,112 · 38 payments from 4 companies
- 2024$240.86 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Tandem Diabetes Care, Inc. | $26,996 | 34 |
| Amgen Inc. | $44.24 | 2 |
| Mannkind Corporation | $42.50 | 1 |
| Sequel Med Tech, LLC | $30.05 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$23,493 · 16 payments
- Travel and Lodging$2,536 · 10 payments
- Food and Beverage$1,041 · 11 payments
- Education$42.50 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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