Wanjun Bae, M.D.
Gastroenterology Physician · Mission Viejo, CA
Wanjun Bae, M.D. is a gastroenterology physician with a practice address in Mission Viejo, California, and NPI 1457433906, issued on Oct 20, 2006. Check the license (California A85159, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Wanjun Bae
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A85159 CA
Self-reported in NPPES; status is on the state search - Practice location
- 27871 Medical Center RD Ste 200, Mission Viejo, CA 92691
- Phone
- (949) 364-5090
- Enumerated
- Oct 20, 2006
- Record last updated
- Oct 26, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (949) 364-5427
- Medicare enrollment
- Enrolled (PECOS I20050517001008); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Columbia School Of Medicine, 2002
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 27871 Medical Center RD Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karen Bernard, CRNACertified Registered Nurse Anesthetist1861562498
- Daniald Rodrigues, M.D.Gastroenterology Physician1174767230
Verify Wanjun Bae in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A85159Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% more Medicare Part D claims than the average gastroenterology physician in 2024
1,021 Medicare Part D claims for 488 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 34% of claims.
Most prescribed
- Pantoprazole Sodium230 claims
- Plenvu198 claims
- Peg 3350-Electrolyte131 claims
- Omeprazole89 claims
- Colestipol Hcl39 claims
- Linzess30 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $3,924.50
167 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Providence Medical FoundationFullerton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Wanjun Bae among 2,140 gastroenterology physician records in California
Wanjun Bae, M.D. is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2002 · median 2002 among the 1,538 with a school on file
- Record last updated2020 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Mission Viejo → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Ronald Adamany, M.D.Mission Viejo, CA 926911992780688
- Edward Block, M.D.Mission Viejo, CA 926911811973860
- Elmer Chang, M.D.Mission Viejo, CA 926911912083353
- Om Chaurasia, MDMission Viejo, CA 926911528136702
- Jack Feng, M.D.Mission Viejo, CA 926911710964481
- Shahram Javaheri, M.D.Mission Viejo, CA 926911497861439
- Jae Lee, M.D.Mission Viejo, CA 926911194702563
- Nader Mirhoseni, M.D.Mission Viejo, CA 926911588645964
Common questions
What is Wanjun Bae, M.D.'s NPI number?
Wanjun Bae, M.D.'s National Provider Identifier (NPI) is 1457433906, issued on Oct 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Wanjun Bae, M.D. located?
The NPPES record lists a practice address at 27871 Medical Center RD Ste 200, Mission Viejo, CA, 92691. Phone: (949) 364-5090. Providers update this record themselves, so call before visiting.
How can I verify Wanjun Bae, M.D.'s license?
NPPES lists California license number A85159, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Wanjun Bae, M.D. prescribe under Medicare Part D?
In 2024, Wanjun Bae, M.D. had 1,021 Medicare Part D claims for 488 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.