Sian Mara, MS, PA-C
Physician Assistant · San Francisco, CA
Sian Mara, MS, PA-C is a physician assistant with a practice address in San Francisco, California, and NPI 1114357126, issued on Nov 13, 2013. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sian Mara
- Credential
- MS, PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 016771 NY
Self-reported in NPPES; status is on the state search - Practice location
- 400 Parnassus Ave, San Francisco, CA 94143
- Phone
- (415) 746-1000
- Enumerated
- Nov 13, 2013
- Record last updated
- Sep 11, 2025
- Medicare enrollment
- Enrolled (PECOS I20171130001800); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 400 Parnassus Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica Abele, DPTPhysical Therapist1851648133
- Ian Adatia, MB CHBPediatric Cardiology Physician1427085299
- Daniel Adelman, M.D.Internal Medicine Physician1922041821
- Joshua Adler, MDInternal Medicine Physician1194781351
- Justin Ahn, M.D.Urology Physician1063755148
- Weiyun Ai, MDMedical Oncology Physician1649346842
Verify Sian Mara in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average physician assistant in 2024
20 Medicare Part D claims for 14 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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: $20.41
1 payment: food and beverage; the largest payer was Becton, Dickinson and Company. The 64,719 providers of this specialty with any payment received $841.65 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 Medical Group Business ServicesBerkeley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sian Mara among 14,451 physician assistant records in California
Sian Mara, MS, PA-C is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 35% of them.
- NPI issued2013 · 35% of these records are older, 62% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2013 · median 2018 among the 7,214 with a school on file
- Record last updated2025 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physician Assistant providers in California
There are 14,451 physician assistant records in California.
All 14,451 in California → Every provider in San Francisco → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Eliana Agudelo, PASan Francisco, CA 941431982646386
- Crystal Bravate, PA-CSan Francisco, CA 941431043363765
- Douglas Chin, PASan Francisco, CA 941431558303560
- Robin Clark, PA CSan Francisco, CA 941431063403483
- Stephanie Collier, PASan Francisco, CA 941431861673436
- Susan Uyen Huffstutter, PA-CSan Francisco, CA 941431346268901
- Cletus Ibe, PASan Francisco, CA 941431730334152
- Da Thao Neria, PA-CSan Francisco, CA 941431689780942
Common questions
What is Sian Mara, MS, PA-C's NPI number?
Sian Mara, MS, PA-C's National Provider Identifier (NPI) is 1114357126, issued on Nov 13, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Sian Mara, MS, PA-C located?
The NPPES record lists a practice address at 400 Parnassus Ave, San Francisco, CA, 94143. Phone: (415) 746-1000. Providers update this record themselves, so call before visiting.
How can I verify Sian Mara, MS, PA-C's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Sian Mara, MS, PA-C prescribe under Medicare Part D?
In 2024, Sian Mara, MS, PA-C had 20 Medicare Part D claims for 14 beneficiaries; the average among physician assistant prescribers was 830. 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.