Michael Williams, M.D.
NPI 1033158183 · Emergency Medical Services (Emergency Medicine) Physician · Kalamazoo, MI
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Williams, M.D. is a Emergency Medical Services (Emergency Medicine) Physician provider in Kalamazoo, MI (NPI 1033158183).
Provider details
- NPI number
- 1033158183
- Entity type
- Individual
- Primary specialty
- Emergency Medical Services (Emergency Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301074898 (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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
405 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 105 | $76 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 97 | $48 |
| 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 ThG0316 | 68 | $29 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 62 | $114 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 38 | $125 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$29 across 2 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
Registry dates
- Enumerated
- 2006-06-05
- Last updated
- 2010-03-30
Frequently asked questions
- What is Michael Williams's NPI number?
- Michael Williams's National Provider Identifier (NPI) is 1033158183, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Williams's specialty?
- Michael Williams is listed in the NPPES registry with a primary specialty of Emergency Medical Services (Emergency Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Williams located?
- Michael Williams's practice location on file with NPPES is 125 S Kalamazoo Mall, Kalamazoo, MI 49007-4832.
- What is Michael Williams's phone number?
- The practice phone number listed in the NPPES registry for Michael Williams is (269) 343-3900.
- Does Michael Williams accept Medicare?
- Michael Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Williams's NPI active?
- Yes — Michael Williams's NPI (1033158183) is active in the NPPES registry as of the last update on 2010-03-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.