MR. DENNIS YK WEN (MD) – Neurological Surgery Physician, NPI 1689662066
Neurological Surgery Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for MR. DENNIS YK WEN (MD)
87 N AIRLITE ST STE 220
ELGIN, IL 601234995
Phone: (847) 695-6611
Fax: (847) 695-8069
Type: Mailing
5 MARMON LN
BARRINGTON, IL 600104025
Phone: (847) 710-8860
Fax: (682) 316-8126
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
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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: 2008-01-04
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 |
|---|---|---|---|---|
| I20080104000029 | I | Neurosurgery | IL | 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 |
|---|---|---|---|---|
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 146 | 40 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 67 | 39 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 50 | 50 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 47 | 47 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 43 | 36 | $0 |
Insurance plans in this area (ZIP 60123)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| NEUROSURGERY | IL | 63048 | Partial removal of spine bone with release of spinal cord and/or nerves | 12 | 12 |
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