Doctor profile · Federal record
Dr. Rizwan Ahmed, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Gastroenterology Physician · Manassas, VA
- NPI 1841469061
- Accepts Medicare
- 23 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 6 locations .
- Primary practice
-
8640 Sudley RD Ste 201
Manassas, VA 201104404
(703) 368-6819
fax (703) 330-2923 - Additional location
-
170 W Shirley Ave Ste 205
Warrenton, VA 201863083
(540) 347-2470 - Additional location
-
24430 Stone Springs Blvd Ste 250
Dulles, VA 201662268
(571) 248-0653 - Additional location
-
500 Martha Jefferson Dr
Charlottesville, VA 229114668
(434) 654-5260
fax (434) 654-5260 - Additional location
-
7915 Lake Manassas Dr Ste 302
Gainesville, VA 201553260
(571) 248-0653 - Additional location
-
1010 Three Springs Blvd Ste 270
Durango, CO 813018296
(970) 764-3800
fax (970) 764-3840 - Mailing address
-
Po Box 381468
Germantown, TN 381831468
Show 3 more locations
Credentials & registration
- NPI registered
- February 2008 — 18 yrs on file
- Profile last updated
- February 13, 2026
- Year of graduation
- 2003 — 23 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (2)
- Virginia #0101256346 · South Carolina #94846
- Medicaid
- VA #1841469061
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1841469061. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
396
Distinct HCPCS
10
Medicare allowed
$56,843
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45380 |
Biopsy of large bowel using a flexible endoscope | 74 | 74 | $171 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 73 | 73 | $98 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 68 | 60 | $120 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 43 | 43 | $158 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 35 | 35 | $177 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 27 | 27 | $161 | |
G0121 |
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 26 | 26 | $177 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 19 | 19 | $244 | |
96365 |
Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | 19 | 11 | $63 | |
43235 |
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 12 | 12 | $99 |
In context: peer comparison
Among 4 peers in Manassas Gastroenterology Physician, average services per provider: 51. This provider delivers 7.8× the peer median.Open Payments
Industry payments received
All-time total
$642
Transactions
24
Manufacturers
9
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 10 | $316.34 | |
| Janssen Biotech, INC. | 3 | $93.01 | |
| Regeneron Healthcare Solutions, INC. | 3 | $66.05 | |
| Takeda Pharmaceuticals U.S.A., INC. | 2 | $44.48 | |
| Celgene Corporation | 2 | $30.43 | |
| Lilly USA, LLC | 1 | $29.99 | |
| Celltrion USA INC. | 1 | $23.63 | |
| Ethicon US, LLC | 1 | $20.33 | |
| Pfizer INC. | 1 | $17.83 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
251
Patients
66
Total drug cost
$30,434
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 109 | 50 | $1,306 |
| Pantoprazole Sodium | Generic | 50 | 16 | $2,307 |
| Colestipol Hcl | Generic | 16 | 0 | $2,273 |
| Diphenoxylate-Atropine (Diphenoxylate Hcl/Atropine) | Brand | 14 | 0 | $372 |
| Linzess (Linaclotide) | Brand | 14 | 0 | $19,217 |
| Ondansetron Hcl | Generic | 13 | 0 | $334 |
| Colesevelam Hcl | Generic | 12 | 0 | $375 |
| Levsin (Hyoscyamine Sulfate) | Brand | 12 | 0 | $4,178 |
| Lansoprazole | Generic | 11 | 0 | $71 |
Hospital affiliations
Frequently asked questions
What is Dr. Rizwan Ahmed's medical specialty?
Dr. Rizwan Ahmed practices Gastroenterology Physician in Manassas, VA.
Where does Dr. Rizwan Ahmed practice?
Dr. Rizwan Ahmed practices at 8640 Sudley RD Ste 201, Manassas, VA 201104404. Office phone: 7033686819.
What is Dr. Rizwan Ahmed's NPI?
Dr. Rizwan Ahmed's National Provider Identifier (NPI) is 1841469061, issued by NPPES.
Does Dr. Rizwan Ahmed accept Medicare assignment?
Yes. Dr. Rizwan Ahmed accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Rizwan Ahmed commonly perform?
Top Medicare-reported procedures in 2023: Biopsy of large bowel using a flexible endoscope (HCPCS 45380); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.