Sarah Kristen Ringsted, M.D.
Rheumatology Physician · South San Francisco, CA
Sarah Kristen Ringsted, M.D. is a rheumatology physician with a practice address in South San Francisco, California, and NPI 1417376740, issued on Apr 15, 2014. Check the license (California A139874, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sarah Kristen Ringsted
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License numbers
- A139874 CA
PG187967 OR
Self-reported in NPPES; status is on the state search - Practice location
- 1200 EL Camino Real, South San Francisco, CA 94080
- Phone
- (507) 422-2306
- Enumerated
- Apr 15, 2014
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180216002259); accepts Medicare assignment
- Medical or professional school
- Ohio State University College Of Medicine, 2014
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 1200 EL Camino Real
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Lena AlazzehPhysical Therapist1629739859
- Kate AlbeePhysical Therapist1053464495
- Jason Anderson, MDHospitalist Physician1831277466
- Karl Anderson, MDUrology Physician1700964301
Verify Sarah Kristen Ringsted in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A139874Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,133 Medicare Part D claims for 259 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims.
Most prescribed
- Methotrexate218 claims
- Prednisone162 claims
- Hydroxychloroquine Sulfate134 claims
- Allopurinol90 claims
- Colchicine37 claims
- Leflunomide33 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
- Permanente Medical Group IncSouth San Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sarah Kristen Ringsted among 926 rheumatology physician records in California
Sarah Kristen Ringsted, M.D. is one of 926 rheumatology 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 2014, is newer than 79% of them.
- NPI issued2014 · 79% of these records are older, 18% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2014 · median 2003 among the 641 with a school on file
- Record last updated2021 · 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 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in South San Francisco → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Ian McLean, MBCHB PHD FACP FRCPSouth San Francisco, CA 940801306047378
- Edward Amento, M.D.Sunnyvale, CA 940851457896961
- Alan Lash, MDRedwood City, CA 940631497833032
- Gurkirpal Sehgal, MDWoodside, CA 940621922484807
- Mona Trivedi, M.D.San Francisco, CA 941071477799195
- Anthony Padula, M.D.San Francisco, CA 941081235103813
- Gerson Bernhard, MDSan Francisco, CA 941091710930052
- Karen Yeter, MDSan Francisco, CA 941091326210055
Common questions
What is Sarah Kristen Ringsted, M.D.'s NPI number?
Sarah Kristen Ringsted, M.D.'s National Provider Identifier (NPI) is 1417376740, issued on Apr 15, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Sarah Kristen Ringsted, M.D. located?
The NPPES record lists a practice address at 1200 EL Camino Real, South San Francisco, CA, 94080. Phone: (507) 422-2306. Providers update this record themselves, so call before visiting.
How can I verify Sarah Kristen Ringsted, M.D.'s license?
NPPES lists California license number A139874, 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 Sarah Kristen Ringsted, M.D. prescribe under Medicare Part D?
In 2024, Sarah Kristen Ringsted, M.D. had 1,133 Medicare Part D claims for 259 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.