Doctor profile · Federal record
Dr. Syam Gaddam, MD
Gastroenterology Physician (CMS: Gastroenterology) · Internal Medicine Physician · Garden Grove, CA
- NPI 1275510711
- Accepts Medicare
- 45 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
11922 Seacrest Dr, Ste A
Garden Grove, CA 928401937
(714) 636-9100
fax (714) 636-1806
Credentials & registration
- NPI registered
- December 2005 — 21 yrs on file
- Profile last updated
- February 12, 2008
- Year of graduation
- 1981 — 45 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #A50714
- Medicaid
- CA #00A507140
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1275510711. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,568
Distinct HCPCS
10
Medicare allowed
$162,149
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 637 | 222 | $83 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 235 | 135 | $108 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 136 | 95 | $99 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 131 | 14 | $52 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 108 | 104 | $137 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 94 | 90 | $91 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 50 | 50 | $184 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 49 | 49 | $121 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 42 | 41 | $233 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 34 | 34 | $182 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 120. This provider delivers 13× the peer median.Open Payments
Industry payments received
All-time total
$838
Transactions
33
Manufacturers
9
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Ardelyx, Inc. | 9 | $228.35 | |
| Phathom Pharmaceuticals, Inc. | 8 | $151.77 | |
| PFIZER INC. | 5 | $143.82 | |
| Madrigal Pharmaceuticals | 3 | $109.22 | |
| Gilead Sciences, Inc. | 3 | $76.86 | |
| ABBVIE INC. | 2 | $46.73 | |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $30.80 | |
| Exact Sciences Corporation | 1 | $26.32 | |
| Celltrion USA Inc. | 1 | $24.51 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,104
Patients
443
Total drug cost
$124,007
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 166 | 50 | $2,928 |
| Omeprazole | Generic | 156 | 70 | $2,395 |
| Lansoprazole | Generic | 111 | 45 | $3,542 |
| Linzess (Linaclotide) | Brand | 110 | 33 | $78,042 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,mag Sulfates) | Brand | 89 | 84 | $6,834 |
| Dicyclomine Hcl | Generic | 71 | 25 | $1,241 |
| Atorvastatin Calcium | Generic | 68 | 15 | $797 |
| Famotidine | Generic | 53 | 19 | $608 |
| Amlodipine Besylate | Generic | 49 | 15 | $242 |
| Losartan Potassium | Generic | 44 | 11 | $1,019 |
Frequently asked questions
What is Dr. Syam Gaddam's medical specialty?
Dr. Syam Gaddam practices Gastroenterology Physician in Garden Grove, CA.
Where does Dr. Syam Gaddam practice?
Dr. Syam Gaddam practices at 11922 Seacrest Dr, Garden Grove, CA 928401937. Office phone: 7146369100.
What is Dr. Syam Gaddam's NPI?
Dr. Syam Gaddam's National Provider Identifier (NPI) is 1275510711, issued by NPPES.
Does Dr. Syam Gaddam accept Medicare assignment?
Yes. Dr. Syam Gaddam accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Syam Gaddam commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.