Enambir Singh Josan, M.D.
NPI 1013399575ActiveIndividual· Internal Medicine, Pulmonary Disease· Knoxville, TN
Internal Medicine, Pulmonary Disease (M.D.) with University Health System, Inc., practicing in Knoxville, Tennessee. Their prescriptions cost Medicare Part D more than their services did: $148,183 for 438 claims, against $68,113 paid for services in 2024. Intuitive Surgical, Inc. was the largest of 19 companies reporting payments in 2025, $1,701 in all, mostly food and beverage. Lists University Health System, Inc as a hospital affiliation.
Overview
| NPI | 1013399575 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 22, 2015 |
| Last updated in NPPES | Jul 14, 2023 |
| Certified by provider | Jul 14, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 65886 | TN |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 65886 | TN |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Pulmonary Disease (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 379 |
|---|---|
| Services billed | 1,125 across 51 procedure codes |
| Paid by Medicare | $68,113 |
Part D prescriptions in 2024
| Prescriptions (claims) | 438 · 635 30-day fills |
|---|---|
| Patients | 113 |
| Total drug cost | $148,183 |
| Generic share | 35% of claims |
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | Pulmonary Disease |
Medical group
- University Health System, Inc.Knoxville, TN · 522 clinicians
Hospital affiliation
- University Health System, IncKnoxville, TN
Industry payments (Open Payments)
- 2025$1,701 · 53 payments from 19 companies
- 2024$2,871 · 56 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $705.83 | 6 |
| Astrazeneca Pharmaceuticals LP | $153.57 | 10 |
| Actelion Pharmaceuticals US, Inc. | $115.23 | 5 |
| Regeneron Healthcare Solutions, Inc. | $88.57 | 5 |
| Amgen Inc. | $82.68 | 4 |
What the 2025 payments were for
- Food and Beverage$1,409 · 50 payments
- Travel and Lodging$292.18 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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