Quick answers
- Does Sajen J. Mathews accept Medicare assignment?
- Yes. Medicare's clinician data says Sajen J. Mathews accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Sajen J. Mathews see?
- In 2024, CMS data shows 340 Original Medicare patients and 705 services for Sajen J. Mathews. This counts Original Medicare only and measures volume, not quality.
- What is Sajen J. Mathews's NPI number?
- 1326048323. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Sajen J. Mathews, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 340 |
|---|---|
| Services billed to Medicare | 705 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)158 services
- 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 monito (G0500)118 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)65 services
- Biopsy of large bowel using a flexible endoscope (45380)63 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)63 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure69%
- Arthritis55%
- Diabetes27%
- Osteoporosis24%
- Ischemic heart disease23%
Hospitals where Sajen J. Mathews works
Medicare's Facility Affiliation Data lists Sajen J. Mathews at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Providence St. Jude Medical CenterFullerton, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050168
Practice locations
Addresses where Sajen J. Mathews is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 E Valencia Mesa Dr, Suite 105Fullerton, CA 92835 (714) 871‑3006
- 1835 Sunny Crest DrFullerton, CA 92835 (714) 446‑5101
- 1837 Sunny Crest DrFullerton, CA 92835 (714) 446‑5831
- 1950 Sunny Crest Dr, Suite 2900Fullerton, CA 92835 (714) 992‑5350
- 8078 E Santa Ana Canyon RdAnaheim, CA 92808 (714) 974‑2900
Group practices
Medicare enrollment lists Sajen J. Mathews as a member of this group (CMS data updated October 2, 2026).
- Providence Medical Foundation1,466 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Fullerton
Clinicians with the same Medicare primary specialty in Fullerton, CA — not a recommendation.
Other clinicians in Providence Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1986 (40 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1326048323 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians