Sienmi Du, MD, PHD
Obstetrics & Gynecology Physician · San Francisco, CA
Sienmi Du, MD, PHD is an obstetrics & gynecology physician with a practice address in San Francisco, California, and NPI 1447711320, issued on Mar 25, 2019. Check the license (California 1447711320, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sienmi Du
- Credential
- MD, PHD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 1447711320 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1001 Potrero Ave # 6D, San Francisco, CA 94110
- Phone
- (415) 476-5192
- Enumerated
- Mar 25, 2019
- Record last updated
- Jan 21, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (415) 476-1811
- Medicare enrollment
- Enrolled (PECOS I20251112003643); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1001 Potrero Ave # 6D
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Chitra Akileswaran, MDObstetrics & Gynecology Physician1053600734
- Michele Baron, MDObstetrics & Gynecology Physician1932594264
- Adam Bonnington, MDObstetrics & Gynecology Physician1811382328
- Katherine BritoStudent in an Organized Health Care Education/Training Program1104567171
- Arianna Cassidy, MDObstetrics & Gynecology Physician1902268923
- Andrea Dalve-Endres, MDObstetrics & Gynecology Physician1326225905
Verify Sienmi Du in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 1447711320Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
138 Medicare Part D claims for 35 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Ibuprofen17 claims
- Premarin14 claims
- Oxycodone Hcl13 claims
- Gabapentin11 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: $46.66
2 payments; by number, the most common kind was food and beverage; the largest payer was Adaptive Biotechnologies Corporation. 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
- Ucsf Health Medical FoundationSanta Cruz, 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 Sienmi Du, MD, PHD's NPI number?
Sienmi Du, MD, PHD's National Provider Identifier (NPI) is 1447711320, issued on Mar 25, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Sienmi Du, MD, PHD located?
The NPPES record lists a practice address at 1001 Potrero Ave # 6D, San Francisco, CA, 94110. Phone: (415) 476-5192. Providers update this record themselves, so call before visiting.
How can I verify Sienmi Du, MD, PHD's license?
NPPES lists California license number 1447711320, 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 Sienmi Du, MD, PHD prescribe under Medicare Part D?
In 2024, Sienmi Du, MD, PHD had 138 Medicare Part D claims for 35 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.