Doctor profile · Federal record
Dr. Mark Hwang
Radiation Oncology Physician (CMS: Radiation Oncology) · Student in an Organized Health Care Education/Training Program · Greenwich, CT
- NPI 1487049037
- Accepts Medicare
- 11 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
5 Perryridge RD
Greenwich, CT 068304608
(208) 863-3911 - Mailing address
-
622 W 168Th St, Chony North Basement Room 11
New York, NY 100323720
Credentials & registration
- NPI registered
- March 2015 — 11 yrs on file
- Profile last updated
- November 18, 2020
- Year of graduation
- 2015 — 11 yrs since
- Specialty taxonomy
- 2085R0001X — NUCC code
- State license (1)
- Wisconsin #73946
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1487049037. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,376
Distinct HCPCS
10
Medicare allowed
$209,406
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
77014 |
Ct guidance for insertion of radiation therapy fields | 848 | 54 | $43 | |
77014 |
Ct guidance for insertion of radiation therapy fields | 435 | 23 | $43 | |
77300 |
Calculation of radiation therapy dose | 158 | 59 | $31 | |
77427 |
Radiation treatment management, 5 treatment sessions | 144 | 40 | $180 | |
77427 |
Radiation treatment management, 5 treatment sessions | 128 | 40 | $180 | |
77334 |
Design and construction of complex radiation treatment device | 86 | 53 | $58 | |
77263 |
Complex radiation therapy planning | 71 | 68 | $159 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 57 | 53 | $61 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 53 | 52 | $62 | |
77301 |
High precision radiation therapy planning | 46 | 45 | $402 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 99. This provider delivers 24× the peer median.Open Payments
Industry payments received
All-time total
$20
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Siemens Medical Solutions USA, Inc. | 1 | $20.40 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
716
Patients
241
Total drug cost
$14,997
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Tamsulosin Hcl | Generic | 477 | 156 | $9,063 |
| Oxybutynin Chloride Er (Oxybutynin Chloride) | Brand | 142 | 46 | $4,521 |
| Megestrol Acetate | Generic | 44 | 17 | $701 |
| Methylprednisolone | Generic | 29 | 22 | $278 |
| Alfuzosin Hcl Er (Alfuzosin Hcl) | Brand | 12 | 0 | $271 |
| Ondansetron Odt (Ondansetron) | Brand | 12 | 0 | $163 |
Hospital affiliations
Frequently asked questions
What is Dr. Mark Hwang's medical specialty?
Dr. Mark Hwang practices Radiation Oncology Physician in Greenwich, CT.
Where does Dr. Mark Hwang practice?
Dr. Mark Hwang practices at 5 Perryridge RD, Greenwich, CT 068304608. Office phone: 2088633911.
What is Dr. Mark Hwang's NPI?
Dr. Mark Hwang's National Provider Identifier (NPI) is 1487049037, issued by NPPES.
Does Dr. Mark Hwang accept Medicare assignment?
Yes. Dr. Mark Hwang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Hwang commonly perform?
Top Medicare-reported procedures in 2023: Ct guidance for insertion of radiation therapy fields (HCPCS 77014); Ct guidance for insertion of radiation therapy fields (HCPCS 77014); Calculation of radiation therapy dose (HCPCS 77300). Source: CMS Medicare Physician & Other Practitioners file.