Sandra Hsiao-Chuang Tan, MD
Family Medicine Physician · Oceanside, CA
Sandra Hsiao-Chuang Tan, MD is a family medicine physician with a practice address in Oceanside, California, and NPI 1972527489, issued on Jul 27, 2006. Check the license (California A64303, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sandra Hsiao-Chuang Tan
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A64303 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4318 Mission Ave, Oceanside, CA 92057
- Phone
- (760) 901-5010
- Enumerated
- Jul 27, 2006
- Record last updated
- Feb 26, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 00A643030 CA
- Medicare enrollment
- Enrolled (PECOS I20090518000388); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 4318 Mission Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Devin Anderson, FNPFamily Nurse Practitioner1215451117
- Angelique Beach, FNP-CFamily Nurse Practitioner1174006936
- Madalasa Bista, M.D.Family Medicine Physician1174966444
- Michelle Buxton, PA-CMedical Physician Assistant1326076043
- Nancy Chang, DOFamily Medicine Physician1710241559
- Connie Chen, MDFamily Medicine Physician1851319693
Verify Sandra Hsiao-Chuang Tan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A64303Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% fewer Medicare Part D claims than the average family medicine physician in 2024
2,596 Medicare Part D claims for 243 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 48 claims were for opioids.
Most prescribed
- Amlodipine Besylate145 claims
- Atorvastatin Calcium144 claims
- Rosuvastatin Calcium118 claims
- Losartan Potassium100 claims
- Levothyroxine Sodium96 claims
- Lisinopril96 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: $13.15
1 payment: food and beverage; the largest payer was Novo Nordisk Inc. The 55,478 providers of this specialty with any payment received $902.55 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
- Scripps HealthOceanside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sandra Hsiao-Chuang Tan among 17,133 family medicine physician records in California
Sandra Hsiao-Chuang Tan, MD is one of 17,133 family medicine physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1996 · median 2005 among the 10,652 with a school on file
- Record last updated2020 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
68 family medicine physician records list a practice address in Oceanside
They are 68 of the 3,438 NPPES records with a practice address in Oceanside, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Oceanside → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Madalasa Bista, M.D.Oceanside, CA 920571174966444
- Nancy Chang, DOOceanside, CA 920571710241559
- Connie Chen, MDOceanside, CA 920571851319693
- Brian Huizar, MDOceanside, CA 920571831270883
- James Italiano, MDOceanside, CA 920571952422800
- Binh Lieu, MDOceanside, CA 920571518977735
- Gina Maraio, D.O.Oceanside, CA 920571104962042
- Cibu Panicker, M.D.Oceanside, CA 920571235492760
Common questions
What is Sandra Hsiao-Chuang Tan, MD's NPI number?
Sandra Hsiao-Chuang Tan, MD's National Provider Identifier (NPI) is 1972527489, issued on Jul 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sandra Hsiao-Chuang Tan, MD located?
The NPPES record lists a practice address at 4318 Mission Ave, Oceanside, CA, 92057. Phone: (760) 901-5010. Providers update this record themselves, so call before visiting.
How can I verify Sandra Hsiao-Chuang Tan, MD's license?
NPPES lists California license number A64303, 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 Sandra Hsiao-Chuang Tan, MD prescribe under Medicare Part D?
In 2024, Sandra Hsiao-Chuang Tan, MD had 2,596 Medicare Part D claims for 243 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.