Sarah Kiyomi Yamaguchi, M.D.
Obstetrics & Gynecology Physician · Los Angeles, CA
Sarah Kiyomi Yamaguchi, M.D. is an obstetrics & gynecology physician with a practice address in Los Angeles, California, and NPI 1700079944, issued on Aug 21, 2007. Check the license (California A103768, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sarah Kiyomi Yamaguchi
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A103768 CA
Self-reported in NPPES; status is on the state search - Practice location
- 637 Lucas Ave, Los Angeles, CA 90017
- Phone
- (213) 977-4190
- Enumerated
- Aug 21, 2007
- Record last updated
- Feb 6, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (213) 250-4847
- Medicare enrollment
- Enrolled (PECOS I20110323000966); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 2006
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 637 Lucas Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Coralyn Andrestaylor, RD, MPH, CHESRegistered Dietitian1629498548
- Carol Archie, M.D.Maternal & Fetal Medicine Physician1922118041
- Margaret Bates, M.D.Obstetrics & Gynecology Physician1407956527
- Lady Becerra, M.S.Genetic Counselor (M.S.)1275962656
- Mark Dwight, M.D.Obstetrics & Gynecology Physician1851491989
- Suzanne Eckhardt, C.P.Prosthetist1316134802
Verify Sarah Kiyomi Yamaguchi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A103768Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
122 Medicare Part D claims for 41 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims.
Most prescribed
- Estradiol25 claims
- Clotrimazole-Betamethasone14 claims
- Prempro12 claims
- Fluconazole11 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: $744.10
33 payments; by number, the most common kind was food and beverage; the largest payer was Inari Medical, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 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.
Sarah Kiyomi Yamaguchi among 5,088 obstetrics & gynecology physician records in California
Sarah Kiyomi Yamaguchi, M.D. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 38% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2006 · median 2004 among the 2,700 with a school on file
- Record last updated2012 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Los Angeles → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Margaret Bates, M.D.Los Angeles, CA 900171407956527
- Lucien Cox, MDLos Angeles, CA 900171780690032
- Mark Dwight, M.D.Los Angeles, CA 900171851491989
- Joie Guner, M.D.Los Angeles, CA 900171396164422
- Arnold Kalan, M.D.Los Angeles, CA 900171700956174
- Michael Lem, M.D.Los Angeles, CA 900171306916770
- Sharron Manuel, M.D., PH.D.Los Angeles, CA 900171831534429
- Helena Mba, MDLos Angeles, CA 900171326124447
Common questions
What is Sarah Kiyomi Yamaguchi, M.D.'s NPI number?
Sarah Kiyomi Yamaguchi, M.D.'s National Provider Identifier (NPI) is 1700079944, issued on Aug 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Sarah Kiyomi Yamaguchi, M.D. located?
The NPPES record lists a practice address at 637 Lucas Ave, Los Angeles, CA, 90017. Phone: (213) 977-4190. Providers update this record themselves, so call before visiting.
How can I verify Sarah Kiyomi Yamaguchi, M.D.'s license?
NPPES lists California license number A103768, 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 Kiyomi Yamaguchi, M.D. prescribe under Medicare Part D?
In 2024, Sarah Kiyomi Yamaguchi, M.D. had 122 Medicare Part D claims for 41 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.