Physician Profile
Andrew Riggan Williams, M.D.
Unclaimed ProfileAbout Dr. Williams
Based in Oak Park, IL, Andrew Riggan Williams, M.D. is listed in the NPI registry under emergency medicine. Andrew graduated from University of Michigan Medical School in 2016. According to Medicare claims data, Andrew cared for 173 Medicare patients across 182 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (708) 763-6747
- Email not available
Practice Locations
3 ERIE CT
Oak Park, IL 60302
Procedures Most Often Billed to Medicare
182 services · 173 patients · 3 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
131 |
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
29 |
| Critical care, first 30-74 minutes | Office visit | 99291 |
22 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other emergency medicines at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 3
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 21 related providers in 3 groups
Other emergency medicines in Oak Park 5
Same specialty, same city.
Trained at University of Michigan Medical School 8
Other providers in the same specialty who trained at the same institution.
Class of 2016 at University of Michigan Medical School 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Williams specialize in?
Dr. Williams is an emergency medicine in Oak Park, IL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “EMERGENCY MEDICINE”.
NPI registry
Where is Dr. Williams located?
Dr. Williams is listed at 3 ERIE CT, Oak Park, IL 60302. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Williams's phone number?
The number on file is (708) 763-6747. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Williams's NPI number?
Dr. Williams's National Provider Identifier is 1275988156. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Williams go to medical school?
Dr. Williams attended University of Michigan Medical School, graduating in 2016. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Williams been practicing?
Dr. Williams has 10 years experience. Calculated from a graduation year of 2016, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Williams do most often?
According to Medicare billing data, Dr. Williams the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Williams confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Williams. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.