Doctor profile · Federal record
Dr. Wanjun Bae, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Internal Medicine Physician · Mission Viejo, CA
- NPI 1457433906
- Accepts Medicare
- 24 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
27871 Medical Center RD Ste 200
Mission Viejo, CA 926916406
(949) 364-5090
fax (949) 364-5427
Credentials & registration
- NPI registered
- October 2006 — 20 yrs on file
- Profile last updated
- October 26, 2020
- Year of graduation
- 2002 — 24 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #A85159
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1457433906. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
706
Distinct HCPCS
10
Medicare allowed
$91,654
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 127 | 92 | $139 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 125 | 125 | $76 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 104 | 104 | $251 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 82 | 79 | $107 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 76 | 76 | $180 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 49 | 39 | $98 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 41 | 41 | $122 | |
45381 |
Injection beneath lining of large bowel using a flexible endoscope | 32 | 32 | $17 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 23 | 17 | $121 | |
36415 |
Insertion of needle into vein for collection of blood sample | 21 | 12 | $8 |
In context: peer comparison
Among 7 peers in this city , average services per provider: 55. This provider delivers 13× the peer median.Open Payments
Industry payments received
All-time total
$3,925
Transactions
163
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 68 | $1,595.20 | |
| Janssen Biotech, Inc. | 19 | $574.53 | |
| Takeda Pharmaceuticals U.S.A., Inc. | 17 | $252.86 | |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | 12 | $248.60 | |
| PFIZER INC. | 9 | $213.26 | |
| Celltrion USA Inc. | 6 | $207.11 | |
| GENZYME CORPORATION | 8 | $178.35 | |
| Ardelyx, Inc. | 5 | $138.30 | |
| Ferring Pharmaceuticals Inc. | 4 | $81.91 | |
| Regeneron Healthcare Solutions, Inc. | 3 | $77.32 | |
| Phathom Pharmaceuticals, Inc. | 3 | $73.64 | |
| Gilead Sciences, Inc. | 3 | $67.70 | |
| Medtronic, Inc. | 2 | $53.85 | |
| Celgene Corporation | 3 | $43.09 | |
| Madrigal Pharmaceuticals | 1 | $42.44 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
762
Patients
353
Total drug cost
$105,107
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 290 | 90 | $3,078 |
| Plenvu (Peg3350/Sod Sul/Nacl/Kcl/Asb/C) | Brand | 154 | 153 | $21,527 |
| Omeprazole | Generic | 87 | 30 | $872 |
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 68 | 68 | $1,534 |
| Dexlansoprazole Dr (Dexlansoprazole) | Brand | 26 | 0 | $6,562 |
| Spironolactone | Generic | 22 | 0 | $217 |
| Famotidine | Generic | 19 | 0 | $348 |
| Xifaxan (Rifaximin) | Brand | 17 | 0 | $49,895 |
| Colestipol Hcl | Generic | 16 | 0 | $1,105 |
| Linzess (Linaclotide) | Brand | 15 | 0 | $9,073 |
Hospital affiliations
Frequently asked questions
What is Dr. Wanjun Bae's medical specialty?
Dr. Wanjun Bae practices Gastroenterology Physician in Mission Viejo, CA.
Where does Dr. Wanjun Bae practice?
Dr. Wanjun Bae practices at 27871 Medical Center RD Ste 200, Mission Viejo, CA 926916406. Office phone: 9493645090.
What is Dr. Wanjun Bae's NPI?
Dr. Wanjun Bae's National Provider Identifier (NPI) is 1457433906, issued by NPPES.
Does Dr. Wanjun Bae accept Medicare assignment?
Yes. Dr. Wanjun Bae accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Wanjun Bae commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Biopsy of large bowel using a flexible endoscope (HCPCS 45380); Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385). Source: CMS Medicare Physician & Other Practitioners file.