BOBBY BYUNG SUN YUN (MD) – Family Medicine Physician, NPI 1154399061
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
3,050 FAMILY PRACTICE in WI
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Provider Addresses for BOBBY BYUNG SUN YUN (MD)
1855, South Koeller Street, Oshkosh, Winnebago County, Wisconsin, 54902, United States
OSHKOSH, WI 549026214
Phone: (920) 223-7010
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 3 Open Payments records for all available years, with a total value of $45.
Total Amount is formed as General ($45) + Research ($0) + Ownership ($0) = $45.
Last reported payment date: 2024-05-22 • Largest payer in this snapshot: Lilly USA, LLC ($45).
Total Amount
$45
General + Research + Ownership
Payments
3
Total payment records
General Amount
$45
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-05-22
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Lilly USA, LLC | $45 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2004-08-24
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20040824000155 | I | Family Practice | WI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 81 | 62 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 74 | 74 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 39 | 39 | $0 |
| 81003 | Automated urinalysis test | 25 | 17 | $0 |
Insurance plans in this area (ZIP 54902)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | CA | |
| Physician Assistant | WI | |
| Physician Assistant | WI |
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