Theodore Sy, MD
NPI 1003865627 · Gastroenterology Physician · Laguna Hills, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Theodore Sy, MD is a Gastroenterology Physician provider in Laguna Hills, CA (NPI 1003865627).
Provider details
- NPI number
- 1003865627
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A90266 (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
312 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) |
|---|---|---|
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 54 | $261 |
| Moderate Sedation Services Provided By the Same Physician Or Other Qualified Health Care Professional Performing a Gastrointestinal Endoscopic Service That Sedation Supports, Requiring the Presence of an Independent Trained Observer to Assist in the MonitoG0500 | 47 | $6 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 46 | $180 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 40 | $135 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 266 | 264 |
| Omeprazole | 114 | 49 |
| Famotidine | 104 | 37 |
| Pantoprazole Sodium | 87 | 38 |
| Lipase/Protease/Amylasebrand: Creon | 86 | 31 |
| Linaclotidebrand: Linzess | 46 | 13 |
| Mesalamine | 45 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,432 across 58 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
- 2006-05-09
- Last updated
- 2022-02-07
- Certified
- 2022-02-07
Frequently asked questions
- What is Theodore Sy's NPI number?
- Theodore Sy's National Provider Identifier (NPI) is 1003865627, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Theodore Sy's specialty?
- Theodore Sy is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Theodore Sy located?
- Theodore Sy's practice location on file with NPPES is 26538 Moulton Pkwy Ste 38e, Laguna Hills, CA 92653.
- What is Theodore Sy's phone number?
- The practice phone number listed in the NPPES registry for Theodore Sy is (949) 448-0656.
- Does Theodore Sy accept Medicare?
- Theodore Sy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Theodore Sy's NPI active?
- Yes — Theodore Sy's NPI (1003865627) is active in the NPPES registry as of the last update on 2022-02-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.