MIGNONETTE MAE WILLKOM (MD) – Family Medicine Physician, NPI 1003883133
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
13,237 FAMILY PRACTICE in CA
Provider Addresses for MIGNONETTE MAE WILLKOM (MD)
1133 E STANLEY BLVD STE 101
LIVERMORE, CA 945504270
Phone: (925) 454-4280
Type: Mailing
42, Fenton Street, Livermore, Alameda County, California, 94550, United States
LIVERMORE, CA 945504144
Phone: (925) 443-3232
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $15.
Total Amount is formed as General ($15) + Research ($0) + Ownership ($0) = $15.
Last reported payment date: 2024-11-18 • Largest payer in this snapshot: Exact Sciences Corporation ($15).
Total Amount
$15
General + Research + Ownership
Payments
1
Total payment records
General Amount
$15
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-18
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Exact Sciences Corporation | $15 |
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: 2004-06-09
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20040609000657 | I | Family Practice | CA | 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 | 483 | 238 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 325 | 190 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 164 | 164 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 129 | 102 | $0 |
| G0008 | Administration of influenza virus vaccine | 63 | 62 | $0 |
Insurance plans in this area (ZIP 94550)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CA | |
| - | CA | |
| - | CA | |
| E N D O C R I N O L O G Y | CA | |
| - | CA | |
| Family Practice | CA | |
| - | CA | |
| - | CA | |
| - | CA | |
| - | CA |
Reviews
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