Lisa Toshiye Taniwa Ryujin, M.D./M.P.H.
Obstetrics & Gynecology Physician · Oakland, CA
Lisa Toshiye Taniwa Ryujin, M.D./M.P.H. is an obstetrics & gynecology physician with a practice address in Oakland, California, and NPI 1134451438, issued on Feb 11, 2010. Check the license (California A 110675, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lisa Toshiye Taniwa Ryujin
- Credential
- M.D./M.P.H.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A 110675 CA
Self-reported in NPPES; status is on the state search - Practice location
- 280 W Macarthur Blvd, Oakland, CA 94611
- Phone
- (510) 752-7772
- Enumerated
- Feb 11, 2010
- Record last updated
- Feb 11, 2022
- Medicare enrollment
- Enrolled (PECOS I20121008000222); accepts Medicare assignment
- Medical or professional school
- University Of Utah School Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 280 W Macarthur Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Donna Abare, MDInternal Medicine Physician1386722155
- Karen Ahn, M.S.Genetic Counselor (M.S.)1396723532
- Kimberly Aikawa-Olin, M.S., R.D., C.D.E.Registered Dietitian1326116740
- Leila Al-MarayatiPhysical Therapist1952459109
- Elizabeth Alexandro, OTR, CHTHand Occupational Therapist1972662708
- Teri Alyami, MDInternal Medicine Physician1326126194
Verify Lisa Toshiye Taniwa Ryujin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A 110675Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
132 Medicare Part D claims for 60 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol49 claims
- Clobetasol Propionate13 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 IncVallejo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lisa Toshiye Taniwa Ryujin among 5,088 obstetrics & gynecology physician records in California
Lisa Toshiye Taniwa Ryujin, M.D./M.P.H. 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 2010, is newer than 70% of them.
- NPI issued2010 · 70% of these records are older, 28% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2007 · median 2004 among the 2,700 with a school on file
- Record last updated2022 · 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 Oakland → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Grace Cavallaro, MDOakland, CA 946111548342165
- Victor Chin, MDOakland, CA 946111598843385
- Christie Cooksey, MDOakland, CA 946111689668386
- Patrick Dawkins, MDOakland, CA 946111760571145
- Rima Goldman, MDOakland, CA 946111528146354
- Judith Lamberti, MDOakland, CA 946111043398837
- Susan Liu, MDOakland, CA 946111376629881
- Sonia Ordonez, MDOakland, CA 946111215049986
Common questions
What is Lisa Toshiye Taniwa Ryujin, M.D./M.P.H.'s NPI number?
Lisa Toshiye Taniwa Ryujin, M.D./M.P.H.'s National Provider Identifier (NPI) is 1134451438, issued on Feb 11, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Lisa Toshiye Taniwa Ryujin, M.D./M.P.H. located?
The NPPES record lists a practice address at 280 W Macarthur Blvd, Oakland, CA, 94611. Phone: (510) 752-7772. Providers update this record themselves, so call before visiting.
How can I verify Lisa Toshiye Taniwa Ryujin, M.D./M.P.H.'s license?
NPPES lists California license number A 110675, 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 Lisa Toshiye Taniwa Ryujin, M.D./M.P.H. prescribe under Medicare Part D?
In 2024, Lisa Toshiye Taniwa Ryujin, M.D./M.P.H. had 132 Medicare Part D claims for 60 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.