Physician Profile
Unclaimed ProfileAbout HWANG
Mark Eugene Hwang practices radiation oncology in Greenwich, CT. Mark is also listed as specializing in student in an organized health care education program. Medicare claims data shows Mark provided 2,243 services to 845 patients.
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
- (208) 863-3911
- Email not available
Practice Locations
5 PERRYRIDGE RD
Greenwich, CT 06830
Procedures Most Often Billed to Medicare
2,243 services · 845 patients · 22 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Ct guidance for insertion of radiation therapy fields | Imaging | 77014 |
813 |
| Ct guidance for insertion of radiation therapy fields | Imaging | 77014 |
326 |
| Calculation of radiation therapy dose | Imaging | 77300 |
136 |
| Radiation treatment management, 5 treatment sessions | Imaging | 77427 |
126 |
| Radiation treatment management, 5 treatment sessions | Imaging | 77427 |
105 |
| Design and construction of complex radiation treatment device | Imaging | 77334 |
90 |
| Complex radiation therapy planning | Imaging | 77263 |
78 |
| Design and construction of radiation treatment device for high precision radiation therapy | Imaging | 77338 |
54 |
| High precision radiation therapy planning | Imaging | 77301 |
54 |
| Calculation of radiation therapy dose | Imaging | 77300 |
30 |
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 1
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 radiation oncology specialists in Greenwich 2
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2015 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Ct guidance for insertion of radiation therapy fields 8
Providers in CT who bill this service to Medicare most often.
Common questions
What does Dr. Hwang specialize in?
Dr. Hwang is a radiation oncology in Greenwich, CT. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “RADIATION ONCOLOGY”.
NPI registry
Where is Dr. Hwang located?
Dr. Hwang is listed at 5 PERRYRIDGE RD, Greenwich, CT 06830. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Hwang's phone number?
The number on file is (208) 863-3911. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Hwang?
Dr. Hwang's National Provider Identifier is 1487049037. 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. Hwang go to medical school?
Dr. Hwang attended Other, graduating in 2015. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Hwang have?
Dr. Hwang has 11 years experience. Calculated from a graduation year of 2015, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Hwang do most often?
According to Medicare billing data, Dr. Hwang performs imaging including ct guidance for insertion of radiation therapy fields and calculation of radiation therapy dose, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Hwang's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Hwang. 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.