Physician Profile
Unclaimed ProfileAbout RYAN
Dennis John Ryan, M.D. is a healthcare provider in Oak Lawn, IL specializing in emergency medicine. According to Medicare claims data, Dennis cared for 203 Medicare patients across 206 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (708) 684-8000
- Email not available
Practice Locations
4440 W 95TH ST
Oak Lawn, IL 60453
Procedures Most Often Billed to Medicare
206 services · 203 patients · 4 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
120 |
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
50 |
| Critical care, first 30-74 minutes | Office visit | 99291 |
20 |
| Emergency department visit with low level of medical decision making | Office visit | 99283 |
16 |
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 physicians at this location 3
Same specialty, same street address — most likely the same department or group.
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.
Other emergency physicians in Oak Lawn 5
Same specialty, same city.
Common questions
What kind of doctor is Dr. Ryan?
Dr. Ryan is an emergency physician in Oak Lawn, IL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “Emergency Medicine”.
NPI registry
What is Dr. Ryan's address?
Dr. Ryan is listed at 4440 W 95TH ST, Oak Lawn, IL 60453. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Ryan?
The number on file is (708) 684-8000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Ryan's NPI number?
Dr. Ryan's National Provider Identifier is 1083626378. 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
How long has Dr. Ryan been practicing?
Dr. Ryan has 20+ years experience. Registered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What procedures does Dr. Ryan perform?
According to Medicare billing data, Dr. Ryan 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. Ryan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ryan. If this is you, claiming it is free.
Guide.md
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.