Dr. Michael Gregory Williams , MD
General Practice • Southfield, MI
Professional Overview & Biography Verified Profile Summary
Dr. Michael Williams, MD is a certified General Practice practicing in Southfield, MI. With approximately 42 years of clinical experience since graduating from University Of Michigan Medical School in 1984, Dr. Williams delivers high-quality medical care to the local community at 20411 W 12 MILE RD STE 102.
Dr. Williams is affiliated with Theoria Medical and accepts Medicare assignment.
Frequently performed procedures and clinical services include established patient outpatient office visit, new patient outpatient office visit, automated urinalysis test. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.
Practice Location & Contact Primary Location
20411 W 12 Mile Rd Ste 102
Southfield, MI 480766404
Medicare Profile & Education
University Of Michigan Medical School
1984
✓ Accepts Assignment
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for General Practice in Southfield, MI
Practicing in Southfield, MI (445 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Clinical Seniority & Experience Comparison
Performed Procedures & Service Volume
Top Medicare Part B procedures performed by this practitioner
| HCPCS Code & Description | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
|
99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
|
117 | 49 | $139.57 | $124.68 |
|
99213
Established patient office or other outpatient visit, typically 15 minutes
|
54 | 28 | $96.30 | $83.84 |
Medical Specialties & State Licenses
CMS Verified: 2026-01-18NUCC Taxonomy Code: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
NUCC Taxonomy Code: 207P00000X
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
Additional State Medicaid & Healthcare Payer Identifiers
Hospital & Practice Group Affiliations
Theoria Medical
2000 32nd St Se, Grand Rapids, MI 495087910
Phone: 2488604634
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Emergency Medicine (License #MW049187 in MI)
General Practice (License #4301049187 in MI)
Registered at 20411 W 12 MILE RD STE 102, SOUTHFIELD, MI 480766404 (Tel: 2489053194)
Registered at 20411 W 12 MILE RD STE 102, SOUTHFIELD, MI 480766404 (Tel: 2489053194)
Registered at 14650 W WARREN AVE STE 300, DEARBORN, MI 481261782 (Tel: 3135513941)
Registered at 14650 W WARREN AVE STE 300, DEARBORN, MI 481261782 (Tel: 3135513941)
Registered at 4967 CROOKS RD STE 110, TROY, MI 48098 (Tel: 2484345191)
Registered at 4967 CROOKS RD STE 110, TROY, MI 480985812 (Tel: 2484345191)
NPI status registered as active in NPPES database
Registered at 5701 BOW POINTE DR, SUITE 100, CLARKSTON, MI 483463198 (Tel: 2486252621)
Registered at 5701 BOW POINTE DR, SUITE 100, CLARKSTON, MI 483463198 (Tel: 2486252621)
Recorded as MICHAEL WILLIAMS, MD
Emergency Medicine (License #MW049187 in MI)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
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NPI Administrative Meta
Mailing Address
20411 W 12 Mile Rd Ste 102
Southfield, MI 480766404
Phone: 2489053194
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.