GREGORY K SEWALL (MD) – Otolaryngology Physician, NPI 1336195023
Otolaryngology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
238 OTOLARYNGOLOGY in WI
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Provider Addresses for GREGORY K SEWALL (MD)
ENT & Allergy Associates, S.C., 512, South 28th Avenue, Wausau, Marathon County, Wisconsin, 54401, United States
WAUSAU, WI 544014147
Phone: (715) 847-2021
Fax: (715) 847-2325
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 6 Open Payments records for all available years, with a total value of $107.
Total Amount is formed as General ($107) + Research ($0) + Ownership ($0) = $107.
Last reported payment date: 2024-11-05 • Largest payer in this snapshot: Medtronic, Inc. ($33).
Total Amount
$107
General + Research + Ownership
Payments
6
Total payment records
General Amount
$107
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-05
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Medtronic, Inc. | $33 |
| Stryker Corporation | $22 |
| KLS-Martin L.P. | $21 |
| Octapharma USA, Inc. | $17 |
| Grifols USA, LLC | $14 |
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: 2006-08-14
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 |
|---|---|---|---|---|
| I20060814000397 | I | Otolaryngology | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 71 | 50 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 60 | 60 | $0 |
| 31575 | Diagnostic exam of voice box using a flexible endoscope | 34 | 32 | $0 |
| 31231 | Diagnostic exam of nasal passages using an endoscope | 27 | 27 | $0 |
| 69210 | Removal of impacted ear wax | 26 | 23 | $0 |
Insurance plans in this area (ZIP 54401)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | MN | |
| Allergy/Immunology, Internal Medicine | WI | |
| Physician Assistant | WI | |
| O T O L A R Y N G O L O G Y | MS | |
| O T O L A R Y N G O L O G Y | WI | |
| O T O L A R Y N G O L O G Y | WI | |
| Physician Assistant | WI | |
| Qualified Audiologist | WI | |
| O T O L A R Y N G O L O G Y | WI | |
| O T O L A R Y N G O L O G Y | WI |
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