Physician Profile
Unclaimed ProfileAbout AHN
No biography has been added yet. Is this you? Claim this profile to add one.
Areas of Expertise
Common questions
What is Dr. Ahn's specialty?
Dr. Ahn is an internist in Chicago, IL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “Internal Medicine”.
NPI registry
Where can I find Dr. Ahn?
Dr. Ahn is listed at 5841 S MARYLAND AVE, Chicago, IL 60637. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Ahn?
The number on file is (888) 824-0200. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Ahn's NPI number?
Dr. Ahn's National Provider Identifier is 1457594574. 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. Ahn been practising?
Dr. Ahn has 17+ years experience. Registered with an NPI since 2009. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practised for longer than this.
NPI registry
What is Dr. Ahn known for?
According to Medicare billing data, Dr. Ahn 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. Ahn confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ahn. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (888) 824-0200
- Email not available
Practice Locations
5841 S MARYLAND AVE
Chicago, IL 60637
Procedures Most Often Billed to Medicare
107 services · 104 patients · 2 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
92 |
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
15 |
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 internists at this location 6
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
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 — 5 related providers in 1 group
Other internists in Chicago 5
Same specialty, same city.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.