MARGRET DUNCAN (MD) – Family Medicine Physician, NPI 1114940434
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
4,418 FAMILY PRACTICE in MI
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Provider Addresses for MARGRET DUNCAN (MD)
336, South River Avenue, Holland, Ottawa County, Michigan, 49423, United States
HOLLAND, MI 494233326
Phone:
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 2 Open Payments records for all available years, with a total value of $39.
Total Amount is formed as General ($39) + Research ($0) + Ownership ($0) = $39.
Last reported payment date: 2024-11-05 • Largest payer in this snapshot: ConvaTec Inc. ($25).
Total Amount
$39
General + Research + Ownership
Payments
2
Total payment records
General Amount
$39
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 |
|---|---|
| ConvaTec Inc. | $25 |
| Dexcom, Inc. | $13 |
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: 2004-11-04
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 |
|---|---|---|---|---|
| I20041104000095 | I | Family Practice | MI | 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 | 115 | 56 | $0 |
| 83036 | Hemoglobin a1c level | 48 | 25 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 41 | 21 | $0 |
| G0008 | Administration of influenza virus vaccine | 26 | 24 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 19 | 16 | $0 |
Insurance plans in this area (ZIP 49423)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| FAMILY MEDICINE | MI | 83036 | Hemoglobin A1C level | 144 | 70 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | MI | |
| - | MI | |
| - | MI | |
| Nurse Practitioner | MI | |
| Internal Medicine, Pediatric Medicine | MI |
Reviews
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