DR. MICHAEL P WILLIAMS (M.D.) – Emergency Medical Services (Emergency Medicine) Physician, NPI 1033158183
Emergency Medical Services (Emergency Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
3,158 EMERGENCY MEDICINE in MI
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Provider Addresses for DR. MICHAEL P WILLIAMS (M.D.)
125, Kalamazoo Mall, Kalamazoo, Kalamazoo County, Michigan, 49007, United States
SUITE 204
KALAMAZOO, MI 490074832
Phone: (269) 343-3900
Fax: (269) 343-5640
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 $29.
Total Amount is formed as General ($29) + Research ($0) + Ownership ($0) = $29.
Last reported payment date: 2024-07-23 • Largest payer in this snapshot: E.R. Squibb & Sons, L.L.C. ($15).
Total Amount
$29
General + Research + Ownership
Payments
2
Total payment records
General Amount
$29
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-07-23
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| E.R. Squibb & Sons, L.L.C. | $15 |
| Boston Scientific Corporation | $14 |
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: 2005-01-15
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 |
|---|---|---|---|---|
| I20050115000131 | I | Emergency 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 | 104 | 62 | $0 |
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 82 | 50 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 75 | 48 | $0 |
| G0316 | Prolonged hospital inpatient or observation care evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by th | 69 | 28 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 35 | 35 | $0 |
Insurance plans in this area (ZIP 49007)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | MI | |
| Internal Medicine | MI | |
| - | MI | |
| - | IN | |
| Gastroenterology, Internal Medicine | MI | |
| Nurse Practitioner | MI | |
| N E U R O L O G Y | MI | |
| Critical Care (Intensivists), Internal Medicine, Pulmonary Disease | MI | |
| Family Practice | MI | |
| N E U R O L O G Y | GA |
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