Syam P. Gaddam, MD
Gastroenterology Physician · Garden Grove, CA
Syam P. Gaddam, MD is a gastroenterology physician with a practice address in Garden Grove, California, and NPI 1275510711, issued on Dec 27, 2005. Check the license (California A50714, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Syam P. Gaddam
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A50714 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11922 Seacrest Dr, Garden Grove, CA 92840
- Phone
- (714) 636-9100
- Enumerated
- Dec 27, 2005
- Record last updated
- Feb 12, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (714) 636-1806
- Medicaid ID
- 00A507140 CA
- Medicare enrollment
- Enrolled (PECOS I20040720001636); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 11922 Seacrest Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Bedard, DDSGeneral Practice Dentistry1811107774
Verify Syam P. Gaddam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A50714Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.4 times the Medicare Part D claims of the average gastroenterology physician in 2024
2,760 Medicare Part D claims for 504 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. 40 claims were for opioids.
Most prescribed
- Omeprazole235 claims
- Sod Sulf-Potass Sulf-Mag Sulf158 claims
- Famotidine153 claims
- Pantoprazole Sodium138 claims
- Lansoprazole119 claims
- Linzess107 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $838.38
33 payments; by number, the most common kind was food and beverage; the largest payer was Ardelyx, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Digestive And Liver Disease Specialists A Medical Group IncGarden Grove, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Syam P. Gaddam among 2,140 gastroenterology physician records in California
Syam P. Gaddam, MD is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1981 · median 2002 among the 1,538 with a school on file
- Record last updated2008 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Garden Grove → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Quang Phan, M.D.Garden Grove, CA 928431982698957
- Martin Carr, M.D.Fullerton, CA 928351326034265
- Patrick Koo, MDFullerton, CA 928351801152772
- Sajen Mathews, MDFullerton, CA 928351326048323
- Yeeshun Miao, M.D.Fullerton, CA 928351518953983
- Kumkum Patel, M.D., MPHFullerton, CA 928351003178138
- Vijay Prabhakar, M.D.Fullerton, CA 928351932593167
- Scott Sainburg, M.D.Fullerton, CA 928351184610552
Common questions
What is Syam P. Gaddam, MD's NPI number?
Syam P. Gaddam, MD's National Provider Identifier (NPI) is 1275510711, issued on Dec 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Syam P. Gaddam, MD located?
The NPPES record lists a practice address at 11922 Seacrest Dr, Garden Grove, CA, 92840. Phone: (714) 636-9100. Providers update this record themselves, so call before visiting.
How can I verify Syam P. Gaddam, MD's license?
NPPES lists California license number A50714, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Syam P. Gaddam, MD prescribe under Medicare Part D?
In 2024, Syam P. Gaddam, MD had 2,760 Medicare Part D claims for 504 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.