Doctor profile · Federal record
Dr. Nelson Chuang, M.D., M.H.S.
Gastroenterology Physician (CMS: Gastroenterology) · Student in an Organized Health Care Education/Training Program · Frederick, MD
- NPI 1336427004
- Accepts Medicare
- 15 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
7109 Guilford Dr Ste 300
Frederick, MD 217045179
(301) 695-6800
fax (301) 695-6891 - Additional location
-
111 E 210Th St
Bronx, NY 104672401
(718) 920-4321
Credentials & registration
- NPI registered
- July 2011 — 15 yrs on file
- Profile last updated
- November 7, 2023
- Year of graduation
- 2011 — 15 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Maryland #D0088057
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1336427004. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
662
Distinct HCPCS
8
Medicare allowed
$86,431
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 166 | 122 | $90 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 166 | 127 | $125 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 121 | 119 | $249 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 84 | 82 | $67 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 54 | 52 | $85 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 30 | 30 | $113 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 27 | 27 | $169 | |
43251 |
Removal of polyps or growths of esophagus, stomach, and/or upper small bowel using an endoscope with mechanical snare | 14 | 13 | $178 |
In context: peer comparison
Among 13 peers in this city , average services per provider: 78. This provider delivers 8.5× the peer median.Open Payments
Industry payments received
All-time total
$2,203
Transactions
100
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | 25 | $336.75 | |
| ABBVIE INC. | 18 | $327.27 | |
| Takeda Pharmaceuticals U.S.A., Inc. | 11 | $278.31 | |
| Janssen Biotech, Inc. | 10 | $259.93 | |
| GENZYME CORPORATION | 4 | $109.27 | |
| PFIZER INC. | 4 | $90.62 | |
| Lilly USA, LLC | 4 | $75.07 | |
| IRONWOOD PHARMACEUTICALS, INC | 4 | $71.84 | |
| Regeneron Healthcare Solutions, Inc. | 4 | $68.82 | |
| Fresenius Kabi USA, LLC | 3 | $68.08 | |
| Ardelyx, Inc. | 2 | $68.06 | |
| Daiichi Sankyo Inc. | 3 | $65.94 | |
| Gilead Sciences, Inc. | 2 | $55.28 | |
| Phathom Pharmaceuticals, Inc. | 3 | $54.81 | |
| Celgene Corporation | 3 | $54.29 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
172
Patients
66
Total drug cost
$4,646
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 73 | 32 | $1,998 |
| Pantoprazole Sodium | Generic | 60 | 23 | $986 |
| Famotidine | Generic | 25 | 11 | $614 |
| Esomeprazole Magnesium | Generic | 14 | 0 | $1,047 |
Hospital affiliations
Frequently asked questions
What is Dr. Nelson Chuang's medical specialty?
Dr. Nelson Chuang practices Gastroenterology Physician in Frederick, MD.
Where does Dr. Nelson Chuang practice?
Dr. Nelson Chuang practices at 7109 Guilford Dr Ste 300, Frederick, MD 217045179. Office phone: 3016956800.
What is Dr. Nelson Chuang's NPI?
Dr. Nelson Chuang's National Provider Identifier (NPI) is 1336427004, issued by NPPES.
Does Dr. Nelson Chuang accept Medicare assignment?
Yes. Dr. Nelson Chuang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Nelson Chuang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385). Source: CMS Medicare Physician & Other Practitioners file.