Margaret Frey, DO
NPI 1215134101 · Neurology Physician · Owosso, MI
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Frey, DO is a Neurology Physician provider in Owosso, MI (NPI 1215134101).
Provider details
- NPI number
- 1215134101
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 5101017273 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
259 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 146 | $93 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 45 | $129 |
| Needle Measurement of Electrical Activity in Arm Or Leg Muscles, Complete Study95886 | 25 | $46 |
| Needle Measurement of Electrical Activity in Muscle With Injection of Chemical for Paralysis of Nerve Muscle95874 | 24 | $18 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 19 | $63 |
Typical Medicare-allowed amounts for these services range $18–$129 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 57 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 180 | 55 |
| Pregabalin | 142 | 36 |
| Carbidopa/Levodopabrand: Carbidopa-Levodopa | 124 | 41 |
| Topiramate | 113 | 31 |
| Levetiracetam | 110 | 33 |
| Lamotrigine | 97 | 24 |
| Galcanezumab-Gnlmbrand: Emgality Pen | 76 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$18,861 across 52 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 4600 Garfield RdAuburn, MI 48611-9369Phone: (989) 729-4147Fax: (989) 729-4157
- 4200 Fashion Square Blvd Ste 301Saginaw, MI 48603-1375Phone: (989) 729-4206Fax: (989) 729-4207
Registry dates
- Enumerated
- 2007-07-02
- Last updated
- 2023-09-11
- Certified
- 2023-09-11
Frequently asked questions
- What is Margaret Frey's NPI number?
- Margaret Frey's National Provider Identifier (NPI) is 1215134101, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Frey's specialty?
- Margaret Frey is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Frey located?
- Margaret Frey's practice location on file with NPPES is 819 N Shiawassee St Ste 110, Owosso, MI 48867-1601.
- What is Margaret Frey's phone number?
- The practice phone number listed in the NPPES registry for Margaret Frey is (989) 723-1390.
- Does Margaret Frey accept Medicare?
- Margaret Frey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Frey's NPI active?
- Yes — Margaret Frey's NPI (1215134101) is active in the NPPES registry as of the last update on 2023-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.