Pauline Siao, MD
Family Medicine Physician · San Carlos, CA
Pauline Siao, MD is a family medicine physician with a practice address in San Carlos, California, and NPI 1740356716, issued on Nov 28, 2006. Check the license (California A66585, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Pauline Siao
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A66585 CA
Self-reported in NPPES; status is on the state search - Practice location
- 301 Industrial RD, San Carlos, CA 94070
- Phone
- (650) 596-4000
- Enumerated
- Nov 28, 2006
- Record last updated
- Mar 4, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090202000548); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1997
- 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 301 Industrial RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria Katrina Abad, AGPCNP-BCNurse Practitioner1306394952
- Maryam Adeel, M.D.Family Medicine Physician1285163998
- Jennifer Akazawa, MDFamily Medicine Physician1457971772
- Sarah Alamillo, PA-CPhysician Assistant1306349352
- Judith Alderman, N.P.Nurse Practitioner1407225121
- Omar Aljundi, NPNurse Practitioner1811464811
Verify Pauline Siao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A66585Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average family medicine physician in 2024
722 Medicare Part D claims for 128 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Atorvastatin Calcium47 claims
- Levothyroxine Sodium38 claims
- Amlodipine Besylate31 claims
- Gabapentin26 claims
- Losartan Potassium18 claims
- Zolpidem Tartrate18 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.
Bills Medicare through one group practice
- Sutter Bay Medical FoundationPalo Alto, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Pauline Siao among 17,133 family medicine physician records in California
Pauline Siao, 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
- Graduated1997 · 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).
35 family medicine physician records list a practice address in San Carlos
They are 35 of the 1,015 NPPES records with a practice address in San Carlos, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Carlos → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Kerri Ashling, MDSan Carlos, CA 940701154373587
- Catherine Baker, M.D.San Carlos, CA 940701639181852
- Richard Barrick, M.D.San Carlos, CA 940701629145040
- Margaret Chan, M.D.San Carlos, CA 940701265517791
- Kevin Chen, M.D.San Carlos, CA 940701881774420
- Steven Harris, M.D.San Carlos, CA 940701720298912
- Jolene Huie, MDSan Carlos, CA 940701235228867
- Karen Jackson, MDSan Carlos, CA 940701285786087
Common questions
What is Pauline Siao, MD's NPI number?
Pauline Siao, MD's National Provider Identifier (NPI) is 1740356716, issued on Nov 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Pauline Siao, MD located?
The NPPES record lists a practice address at 301 Industrial RD, San Carlos, CA, 94070. Phone: (650) 596-4000. Providers update this record themselves, so call before visiting.
How can I verify Pauline Siao, MD's license?
NPPES lists California license number A66585, 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 Pauline Siao, MD prescribe under Medicare Part D?
In 2024, Pauline Siao, MD had 722 Medicare Part D claims for 128 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.