Robert Ra Nien Tseng, MD
Nephrology Physician · Daly City, CA
Robert Ra Nien Tseng, MD is a nephrology physician with a practice address in Daly City, California, and NPI 1053371559, issued on Mar 27, 2006. Check the license (California A66496, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Ra Nien Tseng
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A66496 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1498 Southgate Ave, Daly City, CA 94015
- Phone
- (650) 755-4492
- Enumerated
- Mar 27, 2006
- Record last updated
- Dec 26, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (650) 755-4466
- Medicaid ID
- 00A664960 CA
- Medicare enrollment
- Enrolled (PECOS I20080606000718); accepts Medicare assignment
- Medical or professional school
- Hahnemann University College Of Medicine, 1997
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 1498 Southgate Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Zerina Bangawan, FNPFamily Nurse Practitioner1508163213
- Warren Chang, MDNephrology Physician1083674550
- Christian Cruz, MDNephrology Physician1023182227
- Philip Hertz, MDNephrology Physician1760443725
- Albert Kao, MDNephrology Physician1225099286
- Ruth Ramos, NP-CFamily Nurse Practitioner1194162859
Verify Robert Ra Nien Tseng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A66496Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% more Medicare Part D claims than the average nephrology physician in 2024
2,911 Medicare Part D claims for 331 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Torsemide213 claims
- Amlodipine Besylate198 claims
- Losartan Potassium165 claims
- Tamsulosin Hcl119 claims
- Farxiga110 claims
- Atorvastatin Calcium105 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: $1,099.71
44 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,230 providers of this specialty with any payment received $3,091.37 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 3 group practices
- City And County OF San FranciscoSan Francisco, CA
- North East Medical ServicesSan Francisco, CA
- West Coast KidneyDaly City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Ra Nien Tseng among 1,468 nephrology physician records in California
Robert Ra Nien Tseng, MD is one of 1,468 nephrology physician records with a practice address in California. 88% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1997 · median 2001 among the 1,128 with a school on file
- Record last updated2012 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Daly City → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Daniel Angeli, MDDaly City, CA 940151326417916
- Warren Chang, MDDaly City, CA 940151083674550
- Christian Cruz, MDDaly City, CA 940151023182227
- Philip Hertz, MDDaly City, CA 940151760443725
- Albert Kao, MDDaly City, CA 940151225099286
- Aung Kyaw Maung, M.DDaly City, CA 940151518288877
- Josephus-Ian Sanjorjo, MDDaly City, CA 940151073808168
- Hector Santiesteban, MEDICAL DOCTORDaly City, CA 940151245235738
Common questions
What is Robert Ra Nien Tseng, MD's NPI number?
Robert Ra Nien Tseng, MD's National Provider Identifier (NPI) is 1053371559, issued on Mar 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Ra Nien Tseng, MD located?
The NPPES record lists a practice address at 1498 Southgate Ave, Daly City, CA, 94015. Phone: (650) 755-4492. Providers update this record themselves, so call before visiting.
How can I verify Robert Ra Nien Tseng, MD's license?
NPPES lists California license number A66496, 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 Robert Ra Nien Tseng, MD prescribe under Medicare Part D?
In 2024, Robert Ra Nien Tseng, MD had 2,911 Medicare Part D claims for 331 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.