Doctor profile · Federal record
Dr. Justin Marasigan, DO
Gastroenterology Physician (CMS: Gastroenterology) · Internal Medicine Physician · Internal Medicine Physician · Gastroenterology Physician · Gastroenterology Physician · Oxnard, CA
- NPI 1174714067
- Accepts Medicare
- MIPS 94.9 / 100 · 2023
- 19 yrs in practice
- Licensed in 4 states
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
2241 Wankel Way Ste A
Oxnard, CA 930300191
(805) 983-0521
fax (805) 983-4186 - Additional location
-
1006 North H Street
Aberdeen, WA 98520
(360) 537-6496
fax (360) 537-6322 - Mailing address
-
225 W Broadway Ste 350
Glendale, CA 912041303
Credentials & registration
- NPI registered
- August 2007 — 19 yrs on file
- Profile last updated
- March 18, 2021
- Year of graduation
- 2007 — 19 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (4)
- California #20A18363 · Michigan #5101017474 · Washington #OP60345419 · Pennsylvania #OS015147
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1174714067. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,374
Distinct HCPCS
10
Medicare allowed
$240,463
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99439 |
Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month | 657 | 56 | $51 | |
99490 |
Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 378 | 55 | $67 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 230 | 177 | $135 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 131 | 131 | $114 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 122 | 119 | $95 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 122 | 122 | $176 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 107 | 107 | $253 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 85 | 74 | $97 | |
99454 |
Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days | 84 | 14 | $58 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 83 | 59 | $82 |
In context: peer comparison
Among 3 peers in Oxnard Gastroenterology Physician, average services per provider: 76. This provider delivers 31× the peer median.Open Payments
Industry payments received
All-time total
$2,064
Transactions
93
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 40 | $712.98 | |
| Janssen Biotech, INC. | 9 | $220.31 | |
| Phathom Pharmaceuticals, INC. | 6 | $198.93 | |
| Pfizer INC. | 9 | $165.86 | |
| Regeneron Healthcare Solutions, INC. | 6 | $151.19 | |
| Aimmune Therapeutics, INC. | 4 | $93.13 | |
| Lilly USA, LLC | 3 | $81.19 | |
| Ardelyx, INC. | 3 | $79.10 | |
| Madrigal Pharmaceuticals | 3 | $74.55 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 3 | $69.43 | |
| Takeda Pharmaceuticals U.S.A., INC. | 2 | $68.36 | |
| Genzyme Corporation | 2 | $55.91 | |
| Exact Sciences Corporation | 1 | $22.56 | |
| Intercept Pharmaceuticals, INC. | 1 | $21.18 | |
| Ironwood Pharmaceuticals, INC | 1 | $18.44 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
775
Patients
188
Total drug cost
$150,839
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 296 | 101 | $3,197 |
| Pantoprazole Sodium | Generic | 234 | 61 | $5,167 |
| Linzess (Linaclotide) | Brand | 40 | 14 | $25,902 |
| Creon (Lipase/Protease/Amylase) | Brand | 33 | 0 | $90,673 |
| Lactulose | Generic | 27 | 0 | $1,200 |
| Furosemide | Generic | 20 | 0 | $80 |
| Dexlansoprazole Dr (Dexlansoprazole) | Brand | 18 | 0 | $7,333 |
| Dicyclomine Hcl | Generic | 18 | 12 | $260 |
| Famotidine | Generic | 18 | 0 | $308 |
| Mesalamine | Generic | 18 | 0 | $12,294 |
Hospital affiliations
Frequently asked questions
What is Dr. Justin Marasigan's medical specialty?
Dr. Justin Marasigan practices Gastroenterology Physician in Oxnard, CA.
Where does Dr. Justin Marasigan practice?
Dr. Justin Marasigan practices at 2241 Wankel Way Ste A, Oxnard, CA 930300191. Office phone: 8059830521.
What is Dr. Justin Marasigan's NPI?
Dr. Justin Marasigan's National Provider Identifier (NPI) is 1174714067, issued by NPPES.
Does Dr. Justin Marasigan accept Medicare assignment?
Yes. Dr. Justin Marasigan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Justin Marasigan commonly perform?
Top Medicare-reported procedures in 2023: Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (HCPCS 99439); Chronic care management services (HCPCS 99490); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.