Sajen Mathews, MD
NPI 1326048323 · Gastroenterology Physician · Fullerton, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sajen Mathews, MD is a Gastroenterology Physician provider in Fullerton, CA (NPI 1326048323).
Provider details
- NPI number
- 1326048323
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A53370 (CA)
Specialties & taxonomies
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
673 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 158 | $139 |
| 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 | 118 | $6 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 65 | $179 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 63 | $122 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 63 | $257 |
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 |
|---|---|---|
| Omeprazole | 229 | 88 |
| Pantoprazole Sodium | 126 | 42 |
| Nortriptyline Hcl | 95 | 31 |
| Dicyclomine Hcl | 51 | 23 |
| Famotidine | 47 | 17 |
| Diphenoxylate Hcl/Atropinebrand: Diphenoxylate-Atropine | 43 | 16 |
| Mesalamine | 42 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,382 across 99 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
- 2005-08-01
- Last updated
- 2024-10-22
- Certified
- 2024-10-22
Frequently asked questions
- What is Sajen Mathews's NPI number?
- Sajen Mathews's National Provider Identifier (NPI) is 1326048323, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sajen Mathews's specialty?
- Sajen Mathews is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Sajen Mathews located?
- Sajen Mathews's practice location on file with NPPES is 1837 Sunny Crest Dr, Fullerton, CA 92835-3616.
- What is Sajen Mathews's phone number?
- The practice phone number listed in the NPPES registry for Sajen Mathews is (714) 446-5831.
- Does Sajen Mathews accept Medicare?
- Sajen Mathews is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sajen Mathews's NPI active?
- Yes — Sajen Mathews's NPI (1326048323) is active in the NPPES registry as of the last update on 2024-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.