Sarah Ruth Rettinger, MD
Endocrinology, Diabetes & Metabolism Physician · Santa Monica, CA
Sarah Ruth Rettinger, MD is an endocrinology, diabetes & metabolism physician with a practice address in Santa Monica, California, and NPI 1366691842, issued on Sep 9, 2008. Check the license (California A88064, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sarah Ruth Rettinger
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A88064 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1831 Wilshire Blvd Ste A, Santa Monica, CA 90403
- Phone
- (310) 829-8584
- Enumerated
- Sep 9, 2008
- Record last updated
- Apr 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (424) 291-4205
- Medicare enrollment
- Enrolled (PECOS I20140603001206); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 2002
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 1831 Wilshire Blvd Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rose Lin, M.D.Endocrinology, Diabetes & Metabolism Physician1417975392
Verify Sarah Ruth Rettinger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A88064Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,858 Medicare Part D claims for 243 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 46% of claims.
Most prescribed
- Levothyroxine Sodium284 claims
- Synthroid158 claims
- Mounjaro143 claims
- Ozempic95 claims
- Metformin Hcl Er84 claims
- Alendronate Sodium74 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: $40.24
2 payments; by number, the most common kind was food and beverage; the largest payer was Dexcom, Inc. The 5,661 providers of this specialty with any payment received $5,742.15 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
- Providence Saint Johns Medical FoundationLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sarah Ruth Rettinger among 1,131 endocrinology, diabetes & metabolism physician records in California
Sarah Ruth Rettinger, MD is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 58% of them.
- NPI issued2008 · 58% of these records are older, 36% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2002 · median 2003 among the 779 with a school on file
- Record last updated2021 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Santa Monica → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Rose Lin, M.D.Santa Monica, CA 904031417975392
- Preethi Srikanthan, MDSanta Monica, CA 904031548480171
- Evan Abel, MDSanta Monica, CA 904041619067238
- Philip Barnett, M.D.Santa Monica, CA 904041154309045
- Julie Bernthal, MDSanta Monica, CA 904041619310604
- Linda Glaser, M.D., PH.D.Santa Monica, CA 904041518900976
- Shira Grock, MDSanta Monica, CA 904041871868968
- Richard Guttler, MD FACESanta Monica, CA 904041275653024
Common questions
What is Sarah Ruth Rettinger, MD's NPI number?
Sarah Ruth Rettinger, MD's National Provider Identifier (NPI) is 1366691842, issued on Sep 9, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Sarah Ruth Rettinger, MD located?
The NPPES record lists a practice address at 1831 Wilshire Blvd Ste A, Santa Monica, CA, 90403. Phone: (310) 829-8584. Providers update this record themselves, so call before visiting.
How can I verify Sarah Ruth Rettinger, MD's license?
NPPES lists California license number A88064, 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 Ruth Rettinger, MD prescribe under Medicare Part D?
In 2024, Sarah Ruth Rettinger, MD had 1,858 Medicare Part D claims for 243 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.