Physician Profile
Unclaimed ProfileAbout AHN
Nicholas Cho Ahn, M.D. practices internal medicine in Springfield, IL. Nicholas is a 2013 graduate of Michigan State University College of Human Medicine. Nicholas is also listed as specializing in psychiatry. According to Medicare claims data, Nicholas cared for 531 Medicare patients across 907 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
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (217) 545-8000
- Email not available
Practice Locations
751 N RUTLEDGE ST SUITE 1100
Springfield, IL 62702
Procedures Most Often Billed to Medicare
907 services · 531 patients · 10 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
41 |
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
27 |
| Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | Drug given | J3420 |
34 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
446 |
| Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days | Office visit | 99454 |
89 |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
85 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
68 |
| Management using the results of remote vital sign monitoring per calendar month, first 20 minutes | Office visit | 99457 |
58 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
31 |
| Administration of influenza virus vaccine | Billing code | G0008 |
28 |
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 internal medicines at this location 8
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 6
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 — 31 related providers in 4 groups
Other internal medicines in Springfield 7
Same specialty, same city.
Trained at Michigan State University College of Human Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2013 at Michigan State University College of Human Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Injection of drug or substance under skin or into muscle 8
Providers in IL who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Ahn?
Dr. Ahn is an internal medicine in Springfield, IL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
What is Dr. Ahn's address?
Dr. Ahn is listed at 751 N RUTLEDGE ST SUITE 1100, Springfield, IL 62702. 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. Ahn?
The number on file is (217) 545-8000. 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 1376983346. 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. Ahn train?
Dr. Ahn attended Michigan State University College of Human Medicine, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Ahn been practicing?
Dr. Ahn has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Ahn perform?
According to Medicare billing data, Dr. Ahn provides treatments such as injection of drug or substance under skin or into muscle and influenza vaccine split virus, preservative free, alongside routine visits and testing. 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.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.