Syam Gaddam, MD
NPI 1275510711 · Gastroenterology Physician · Garden Grove, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Syam Gaddam, MD is a Gastroenterology Physician provider in Garden Grove, CA (NPI 1275510711).
Provider details
- NPI number
- 1275510711
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A50714 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,529 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 623 | $81 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 359 | $121 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 135 | $135 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 132 | $104 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 72 | $234 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 64 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 235 | 92 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 158 | 153 |
| Famotidine | 153 | 57 |
| Pantoprazole Sodium | 138 | 50 |
| Lansoprazole | 119 | 44 |
| Linaclotidebrand: Linzess | 107 | 39 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 69 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$838 across 33 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-27
- Last updated
- 2008-02-12
Frequently asked questions
- What is Syam Gaddam's NPI number?
- Syam Gaddam's National Provider Identifier (NPI) is 1275510711, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Syam Gaddam's specialty?
- Syam Gaddam is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Syam Gaddam located?
- Syam Gaddam's practice location on file with NPPES is 11922 Seacrest Dr, Garden Grove, CA 92840-1937.
- What is Syam Gaddam's phone number?
- The practice phone number listed in the NPPES registry for Syam Gaddam is (714) 636-9100.
- Does Syam Gaddam accept Medicare?
- Syam Gaddam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Syam Gaddam's NPI active?
- Yes — Syam Gaddam's NPI (1275510711) is active in the NPPES registry as of the last update on 2008-02-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.