Fen Jiang, MD
Medical Oncology Physician · Mission Viejo, CA
Fen Jiang, MD is a medical oncology physician with a practice address in Mission Viejo, California, and NPI 1831312289, issued on Apr 11, 2007. Check the license (California A97283, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Fen Jiang
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License numbers
- A97283 CA
MD60176134 WA
Self-reported in NPPES; status is on the state search - Practice location
- 27799 Medical Center RD Ste 460, Mission Viejo, CA 92691
- Phone
- (949) 347-0600
- Enumerated
- Apr 11, 2007
- Record last updated
- Aug 19, 2022
- Medicare enrollment
- Enrolled (PECOS I20190625001134); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 447 in California → Look up another NPI →
Also registered at 27799 Medical Center RD Ste 460
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vrinda Bhasin, M.D.Internal Medicine Physician1740660133
- Nadin Faidi, MDHospice and Palliative Medicine (Internal Medicine) Physician1831542158
- Brooke Nichols, M.D.Hospice and Palliative Medicine (Internal Medicine) Physician1932406907
Verify Fen Jiang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A97283Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% more Medicare Part D claims than the average medical oncology physician in 2024
938 Medicare Part D claims for 177 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Anastrozole161 claims
- Dexamethasone56 claims
- Ondansetron Hcl45 claims
- Pantoprazole Sodium43 claims
- Prochlorperazine Maleate42 claims
- Tamoxifen Citrate40 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: $4,236.74
135 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 3,343 providers of this specialty with any payment received $11,773.47 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).
Fen Jiang among 447 medical oncology physician records in California
Fen Jiang, MD is one of 447 medical oncology physician records with a practice address in California. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 45% of them.
- NPI issued2007 · 45% of these records are older, 44% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1996 · median 2004 among the 312 with a school on file
- Record last updated2022 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in California
There are 447 medical oncology physician records in California.
All 447 in California → Every provider in Mission Viejo → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Ranjan Sapra, M.D.Fountain Valley, CA 927081851582860
- Diana Hanna, M.D.Newport Beach, CA 926631689801821
- Alain Mita, MDNewport Beach, CA 926631285602565
- Rupali Nabar, MDHuntington Beach, CA 926481902062839
- Elizabeth Conner, MDIrvine, CA 926181861052888
- Lee Hong, MD, PHDIrvine, CA 926181144840646
- Irene Kang, M.D.Irvine, CA 926181336430727
- Pashtoon Kasi, MD, MSIrvine, CA 926181215167648
Common questions
What is Fen Jiang, MD's NPI number?
Fen Jiang, MD's National Provider Identifier (NPI) is 1831312289, issued on Apr 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Fen Jiang, MD located?
The NPPES record lists a practice address at 27799 Medical Center RD Ste 460, Mission Viejo, CA, 92691. Phone: (949) 347-0600. Providers update this record themselves, so call before visiting.
How can I verify Fen Jiang, MD's license?
NPPES lists California license number A97283, 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 Fen Jiang, MD prescribe under Medicare Part D?
In 2024, Fen Jiang, MD had 938 Medicare Part D claims for 177 beneficiaries; the average among medical oncology physician prescribers was 703. 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.