Doctor profile · Federal record
Dr. Sajen Mathews, MD
Gastroenterology Physician (CMS: Gastroenterology) · Fullerton, CA
- NPI 1326048323
- Accepts Medicare
- 40 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1837 Sunny Crest Dr
Fullerton, CA 928353616
(714) 446-5831
fax (714) 446-7910
Credentials & registration
- NPI registered
- August 2005 — 21 yrs on file
- Profile last updated
- October 22, 2024
- Year of graduation
- 1986 — 40 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #A53370
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1326048323. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
771
Distinct HCPCS
10
Medicare allowed
$93,162
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 164 | 127 | $139 | |
G0500 |
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 | 135 | 133 | $6 | |
99442 |
Telephone medical discussion with physician, 11-20 minutes | 84 | 73 | $98 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 75 | 75 | $180 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 59 | 59 | $258 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 51 | 50 | $130 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 48 | 48 | $90 | |
G0121 |
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 27 | 27 | $192 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 26 | 26 | $192 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 24 | 24 | $98 |
In context: peer comparison
Among 3 peers in Fullerton Gastroenterology Physician, average services per provider: 60. This provider delivers 13× the peer median.Open Payments
Industry payments received
All-time total
$2,382
Transactions
98
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Lilly USA, LLC | 10 | $406.58 | |
| Janssen Biotech, INC. | 13 | $376.12 | |
| Ardelyx, INC. | 12 | $316.37 | |
| Abbvie INC. | 23 | $290.54 | |
| Gilead Sciences, INC. | 9 | $203.07 | |
| Takeda Pharmaceuticals U.S.A., INC. | 12 | $187.50 | |
| Genzyme Corporation | 7 | $176.96 | |
| Enterra Medical, INC. | 1 | $165.76 | |
| Pfizer INC. | 4 | $95.90 | |
| Madrigal Pharmaceuticals | 2 | $33.76 | |
| Regeneron Healthcare Solutions, INC. | 1 | $25.45 | |
| Celltrion USA INC. | 1 | $24.28 | |
| Boehringer Ingelheim Pharmaceuticals, INC. | 1 | $22.21 | |
| Celgene Corporation | 1 | $22.09 | |
| Phathom Pharmaceuticals, INC. | 1 | $18.49 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
705
Patients
231
Total drug cost
$90,373
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 251 | 85 | $2,938 |
| Pantoprazole Sodium | Generic | 83 | 31 | $1,430 |
| Nortriptyline Hcl | Generic | 59 | 21 | $646 |
| Diphenoxylate-Atropine (Diphenoxylate Hcl/Atropine) | Brand | 51 | 19 | $1,870 |
| Dicyclomine Hcl | Generic | 44 | 21 | $960 |
| Famotidine | Generic | 43 | 17 | $444 |
| Mesalamine | Generic | 42 | 11 | $35,257 |
| Prednisone | Generic | 26 | 12 | $269 |
| Lansoprazole | Generic | 19 | 0 | $212 |
| Creon (Lipase/Protease/Amylase) | Brand | 16 | 0 | $40,362 |
Frequently asked questions
What is Dr. Sajen Mathews's medical specialty?
Dr. Sajen Mathews practices Gastroenterology Physician in Fullerton, CA.
Where does Dr. Sajen Mathews practice?
Dr. Sajen Mathews practices at 1837 Sunny Crest Dr, Fullerton, CA 928353616. Office phone: 7144465831.
What is Dr. Sajen Mathews's NPI?
Dr. Sajen Mathews's National Provider Identifier (NPI) is 1326048323, issued by NPPES.
Does Dr. Sajen Mathews accept Medicare assignment?
Yes. Dr. Sajen Mathews accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Sajen Mathews commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); 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 (HCPCS G0500); Telephone medical discussion with physician (HCPCS 99442). Source: CMS Medicare Physician & Other Practitioners file.