Theodore Sy, MD
Gastroenterology Physician · Laguna Hills, CA
Theodore Sy, MD is a gastroenterology physician with a practice address in Laguna Hills, California, and NPI 1003865627, issued on May 9, 2006. Check the license (California A90266, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Theodore Sy
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A90266 CA
Self-reported in NPPES; status is on the state search - Practice location
- 26538 Moulton Pkwy Ste 38E, Laguna Hills, CA 92653
- Phone
- (949) 448-0656
- Enumerated
- May 9, 2006
- Record last updated
- Feb 7, 2022
- Medicare enrollment
- Enrolled (PECOS I20061129000547); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 26538 Moulton Pkwy Ste 38E
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sunil Gupta, D.O.Rheumatology Physician1437310059
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- Suchitra Mohindra, MDFamily Medicine Physician1306828363
Verify Theodore Sy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A90266Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% more Medicare Part D claims than the average gastroenterology physician in 2024
1,098 Medicare Part D claims for 513 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims.
Most prescribed
- Sod Sulf-Potass Sulf-Mag Sulf266 claims
- Omeprazole114 claims
- Famotidine104 claims
- Pantoprazole Sodium87 claims
- Creon86 claims
- Linzess46 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 76.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,432.42
58 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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
- Memorialcare Medical FoundationLaguna Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Theodore Sy among 2,140 gastroenterology physician records in California
Theodore Sy, 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2003 · median 2002 among the 1,538 with a school on file
- Record last updated2022 · 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 Laguna Hills → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Dalia Al-Mudallal, M.D.Laguna Hills, CA 926531356502116
- Shazia Ali, M.D.Laguna Hills, CA 926531063616217
- Rose Codini, M.D.Laguna Hills, CA 926531144215880
- Barry Donner, MDLaguna Hills, CA 926531679534796
- David Hatoff, MDLaguna Hills, CA 926531619930567
- Farid Jalali, M.D.Laguna Hills, CA 926531710244462
- Scott Lee, M.D.Laguna Hills, CA 926531063703890
- Catherine Ngo, M.D.Laguna Hills, CA 926531558531129
Common questions
What is Theodore Sy, MD's NPI number?
Theodore Sy, MD's National Provider Identifier (NPI) is 1003865627, issued on May 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Theodore Sy, MD located?
The NPPES record lists a practice address at 26538 Moulton Pkwy Ste 38E, Laguna Hills, CA, 92653. Phone: (949) 448-0656. Providers update this record themselves, so call before visiting.
How can I verify Theodore Sy, MD's license?
NPPES lists California license number A90266, 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 Theodore Sy, MD prescribe under Medicare Part D?
In 2024, Theodore Sy, MD had 1,098 Medicare Part D claims for 513 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Theodore Sy, MD's MIPS final score?
The 2023 MIPS final score is 76.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.