Doctor profile · Federal record
Dr. Nizar Ramzan, M.D.,
Gastroenterology Physician (CMS: Gastroenterology) · Gastroenterology Physician · Houston, TX
- NPI 1992733992
- Accepts Medicare
- 38 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
1504 Taub Loop
Houston, TX 770301608
(713) 873-8890 - Additional location
-
8761 E Bell RD, Suite 105
Scottsdale, AZ 852601315
(480) 219-6662
fax (480) 219-6596
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- March 24, 2025
- Year of graduation
- 1988 — 38 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (2)
- Texas #V1978 · Arizona #24761
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1992733992. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,650
Distinct HCPCS
10
Medicare allowed
$294,364
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 563 | 397 | $122 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 370 | 331 | $85 | |
99439 |
Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month | 321 | 42 | $46 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 220 | 220 | $160 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 204 | 204 | $107 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 196 | 196 | $167 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 190 | 185 | $88 | |
99490 |
Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 184 | 43 | $60 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 94 | 94 | $211 | |
91065 |
Measurement of hydrogen in breath to test for stomach and bowel symptoms | 61 | 34 | $77 |
In context: peer comparison
Among 86 peers in this city , average services per provider: 77. This provider delivers 34× the peer median.Open Payments
Industry payments received
All-time total
$3,208
Transactions
137
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 23 | $456.04 | |
| Takeda Pharmaceuticals U.S.A., Inc. | 16 | $380.31 | |
| PFIZER INC. | 23 | $289.36 | |
| Gilead Sciences, Inc. | 10 | $275.39 | |
| Celgene Corporation | 15 | $247.25 | |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | 12 | $166.42 | |
| IRONWOOD PHARMACEUTICALS, INC | 8 | $160.86 | |
| Lilly USA, LLC | 4 | $110.43 | |
| Merck Sharp & Dohme LLC | 5 | $107.48 | |
| Regeneron Healthcare Solutions, Inc. | 3 | $101.63 | |
| Ardelyx, Inc. | 4 | $98.70 | |
| AIMMUNE THERAPEUTICS, INC. | 5 | $96.38 | |
| QOL Medical, LLC | 3 | $95.40 | |
| Phathom Pharmaceuticals, Inc. | 3 | $88.00 | |
| Intercept Pharmaceuticals, Inc. | 3 | $69.92 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,970
Patients
878
Total drug cost
$241,012
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 564 | 190 | $10,567 |
| Famotidine | Generic | 419 | 159 | $11,313 |
| Omeprazole | Generic | 223 | 86 | $3,671 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,mag Sulfates) | Brand | 143 | 142 | $11,292 |
| Linzess (Linaclotide) | Brand | 131 | 37 | $131,695 |
| Gavilyte-G (Peg3350/Sod Sulf,bicarb,cl/Kcl) | Brand | 95 | 95 | $1,544 |
| Mesalamine | Generic | 63 | 15 | $46,603 |
| Dicyclomine Hcl | Generic | 57 | 27 | $1,117 |
| Cholestyramine (Cholestyramine (With Sugar)) | Brand | 54 | 21 | $3,713 |
| Sucralfate | Generic | 48 | 28 | $1,716 |
Frequently asked questions
What is Dr. Nizar Ramzan's medical specialty?
Dr. Nizar Ramzan practices Gastroenterology Physician in Houston, TX.
Where does Dr. Nizar Ramzan practice?
Dr. Nizar Ramzan practices at 1504 Taub Loop, Houston, TX 770301608. Office phone: 7138738890.
What is Dr. Nizar Ramzan's NPI?
Dr. Nizar Ramzan's National Provider Identifier (NPI) is 1992733992, issued by NPPES.
Does Dr. Nizar Ramzan accept Medicare assignment?
Yes. Dr. Nizar Ramzan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Nizar Ramzan commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (HCPCS 99439). Source: CMS Medicare Physician & Other Practitioners file.