Physician Profile
Unclaimed ProfileAbout AHN
Christine Sunjung Ahn, MD is a healthcare provider in Stony Brook, NY specializing in emergency medicine. Medicare claims data shows Christine provided 535 services to 528 patients.
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
- (631) 444-2478
- Email not available
Practice Locations
STONY BROOK UNIVERSITY HOSPITAL DEPT OF EMERGENCY MEDICINE
Stony Brook, NY 11794
Procedures Most Often Billed to Medicare
535 services · 528 patients · 6 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein (3 years or older) | Procedure | 36410 |
11 |
| Electrocardiogram (ecg) 1 to 3 leads with review by physician only | Treatment | 93042 |
28 |
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
406 |
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
67 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
12 |
| Initial hospital care with same-day admission and discharge with high level of medical decision making, per day, if using time, at least 85 minutes | Office visit | 99236 |
11 |
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.
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.
Other emergency physicians in Stony Brook 8
Same specialty, same city.
More connections — 8 related providers in 1 group
Also performs Insertion of needle into vein (3 years or older) 8
Providers in NY who bill this service to Medicare most often.
Common questions
What does Dr. Ahn specialize in?
Dr. Ahn is an emergency physician in Stony Brook, NY. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “Emergency Medicine”.
NPI registry
Where is Dr. Ahn located?
Dr. Ahn is listed at STONY BROOK UNIVERSITY HOSPITAL DEPT OF EMERGENCY MEDICINE, Stony Brook, NY 11794. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Ahn's phone number?
The number on file is (631) 444-2478. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Ahn?
Dr. Ahn's National Provider Identifier is 1336307461. 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 much experience does Dr. Ahn have?
Dr. Ahn has 18+ years experience. Registered with an NPI since 2008. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Dr. Ahn do most often?
According to Medicare billing data, Dr. Ahn performs procedures including insertion of needle into vein; provides treatments such as electrocardiogram 1 to 3 leads with review by physician only, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Ahn's profile verified?
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.