Doctor profile · Federal record
Dr. Mark Yun, MD
Rheumatology Physician (CMS: Rheumatology) · Sturbridge, MA
- NPI 1326538687
- Accepts Medicare
- 14 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
198 Charlton RD
Sturbridge, MA 015661571
(508) 765-7878 - Mailing address
-
Po Box 415348
Boston, MA 022415348
Credentials & registration
- NPI registered
- May 2018 — 8 yrs on file
- Profile last updated
- October 3, 2023
- Year of graduation
- 2012 — 14 yrs since
- Specialty taxonomy
- 207RR0500X — NUCC code
- State license (1)
- Massachusetts #1015976
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1326538687. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$19
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Amgen INC. | 1 | $19.33 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
75
Patients
11
Total drug cost
$64,237
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prednisone | Generic | 23 | 11 | $337 |
| Hydroxychloroquine Sulfate | Generic | 14 | 0 | $2,127 |
| Risedronate Sodium Dr (Risedronate Sodium) | Brand | 14 | 0 | $1,906 |
| Methotrexate (Methotrexate Sodium) | Brand | 12 | 0 | $352 |
| Otezla (Apremilast) | Brand | 12 | 0 | $59,515 |
Frequently asked questions
What is Dr. Mark Yun's medical specialty?
Dr. Mark Yun practices Rheumatology Physician in Sturbridge, MA.
Where does Dr. Mark Yun practice?
Dr. Mark Yun practices at 198 Charlton RD, Sturbridge, MA 015661571. Office phone: 5087657878.
What is Dr. Mark Yun's NPI?
Dr. Mark Yun's National Provider Identifier (NPI) is 1326538687, issued by NPPES.
Does Dr. Mark Yun accept Medicare assignment?
Yes. Dr. Mark Yun accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.