MARY G MEZHER (DO) – Internal Medicine Physician, NPI 1124686365
Internal Medicine Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
7,218 INTERNAL MEDICINE in MI
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Provider Addresses for MARY G MEZHER (DO)
Leahy Street, Muskegon, Muskegon County, Michigan, 49444, United States
MUSKEGON, MI 494425543
Phone: (231) 727-5247
Fax: (231) 727-5223
Type: Mailing
1560 E SHERMAN BLVD STE 240
MUSKEGON, MI 494441854
Phone: (231) 672-3883
Fax: (231) 672-3973
Type: Mailing
Mercy Health Mercy Campus, 1500, East Sherman Boulevard, Muskegon, Muskegon County, Michigan, 49444, United States
MUSKEGON, MI 494441849
Phone: (231) 672-3883
Fax: (231) 672-3973
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 5 Open Payments records for all available years, with a total value of $108.
Total Amount is formed as General ($108) + Research ($0) + Ownership ($0) = $108.
Last reported payment date: 2024-06-25 • Largest payer in this snapshot: E.R. Squibb & Sons, L.L.C. ($41).
Total Amount
$108
General + Research + Ownership
Payments
5
Total payment records
General Amount
$108
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-06-25
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| E.R. Squibb & Sons, L.L.C. | $41 |
| ABBVIE INC. | $33 |
| Medtronic, Inc. | $19 |
| Merck Sharp & Dohme LLC | $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: 2022-08-03
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 |
|---|---|---|---|---|
| I20220803002877 | I | Internal Medicine | 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 |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 379 | 188 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 63 | 43 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 44 | 41 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 42 | 42 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 40 | 40 | $0 |
Insurance plans in this area (ZIP 49442)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine, Hospitalist | IL | |
| Osteopathic Manipulative Medicine, Emergency Medicine | TX | |
| Hospitalist, Internal Medicine | MI | |
| Clinical Psychologist | CA | |
| Physician Assistant | MI | |
| Physician Assistant | MI | |
| Physician Assistant | MT | |
| Physician Assistant | MI | |
| Internal Medicine | MI | |
| Osteopathic Manipulative Medicine | MI |
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