Joanna Du, M.D.
Obstetrics & Gynecology Physician · Upland, CA
Joanna Du, M.D. is an obstetrics & gynecology physician with a practice address in Upland, California, and NPI 1477731677, issued on Feb 11, 2008. Check the license (California A101756, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joanna Du
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A101756 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1310 San Bernardino RD Ste 201, Upland, CA 91786
- Phone
- (909) 579-0806
- Enumerated
- Feb 11, 2008
- Record last updated
- Jul 8, 2022
- Fax
- (909) 579-1331
- Medicare enrollment
- Enrolled (PECOS I20100517000221); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1310 San Bernardino RD Ste 201
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Doris AlanFamily Nurse Practitioner1558023754
- Andrea AlvarezFamily Nurse Practitioner1154215101
- Cecilia Phong, MDObstetrics & Gynecology Physician1114318151
- Jewelry TranNurse Practitioner1801752290
Verify Joanna Du in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A101756Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
255 Medicare Part D claims for 130 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Estradiol130 claims
- Clobetasol Propionate17 claims
- Ibuprofen16 claims
- Misoprostol15 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: $521.68
14 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 21,429 providers of this specialty with any payment received $1,030.61 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
- Care For Womens Medical Group IncUpland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
Other obstetrics & gynecology physician records in California
- Ingrid Aalami, MDSan Jose, CA1952376550
- Avisa Abaian- Eagar, M.D.Orange, CA1316057755
- Derek Abbassi, MDWalnut Creek, CA1841364155
- Ahmed Abdelaziz, MDSanta Maria, CA1790039733
- Alireza Abdollah Shamshirsaz, M.D.Palo Alto, CA1881804235
- Nicole Abell, DOVentura, CA1811243603
- Zachary AbelsonLos Angeles, CA1689237414
- Ray Abinader, M.D.Loma Linda, CA1770901548
- Tarek Abou El Kheir, M.D.San Bernardino, CA1477521789
- Nada Abou-HaibaLos Angeles, CA1134067549
Common questions
What is Joanna Du, M.D.'s NPI number?
Joanna Du, M.D.'s National Provider Identifier (NPI) is 1477731677, issued on Feb 11, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Joanna Du, M.D. located?
The NPPES record lists a practice address at 1310 San Bernardino RD Ste 201, Upland, CA, 91786. Phone: (909) 579-0806. Providers update this record themselves, so call before visiting.
How can I verify Joanna Du, M.D.'s license?
NPPES lists California license number A101756, 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 Joanna Du, M.D. prescribe under Medicare Part D?
In 2024, Joanna Du, M.D. had 255 Medicare Part D claims for 130 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.