MARGARET ROSE FREY (DO) – Neurology Physician, NPI 1215134101
Neurology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
965 NEUROLOGY in MI
Provider Addresses for MARGARET ROSE FREY (DO)
4200 Fashion Square Blvd Ste 301
Saginaw, MI 486031375
Phone: (989) 729-4206
Fax: (989) 729-4207
Type: Location
4600 Garfield Rd
Auburn, MI 486119369
Phone: (989) 729-4147
Fax: (989) 729-4157
Type: Location
818, West King Street, Owosso, Shiawassee County, Michigan, 48867, United States
STE 103
OWOSSO, MI 488672116
Phone: (989) 723-1390
Fax: (989) 725-1415
Type: Mailing
819 N SHIAWASSEE ST STE 110
OWOSSO, MI 488671601
Phone: (989) 723-1390
Fax: (989) 725-1415
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 149 Open Payments records for all available years, with a total value of $60,934.
Total Amount is formed as General ($59,395) + Research ($1,539) + Ownership ($0) = $60,934.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: Biogen, Inc. ($38,671).
Total Amount
$60,934
General + Research + Ownership
Payments
149
Total payment records
General Amount
$59,395
General payments
Research Amount
$1,539
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Biogen, Inc. | $38,671 |
| Genentech USA, Inc. | $11,839 |
| ABBVIE INC. | $5,889 |
| Genentech, Inc. | $2,504 |
| F. Hoffmann-La Roche AG | $1,539 |
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: 2011-11-11
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 |
|---|---|---|---|---|
| I20111111000713 | I | Neurology | 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 | 159 | 116 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 49 | 36 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 40 | 40 | $0 |
| 95874 | Needle measurement of electrical activity in muscle with injection of chemical for paralysis of nerve muscle | 27 | 12 | $0 |
| 95816 | Measurement of brain wave activity (eeg), awake and drowsy | 12 | 12 | $0 |
Insurance plans in this area (ZIP 48603)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | MI | |
| A N E S T H E S I O L O G Y | IL | |
| Internal Medicine | MI | |
| Nurse Practitioner | MI | |
| - | MI | |
| Physician Assistant | MI | |
| - | MI | |
| Nurse Practitioner | MI | |
| Internal Medicine, Geriatric Medicine | MI | |
| Physician Assistant | MI |
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