Yumi Mendez-Ishizaki, MD
Obstetrics & Gynecology Physician · Long Beach, CA
Yumi Mendez-Ishizaki, MD is an obstetrics & gynecology physician with a practice address in Long Beach, California, and NPI 1942723994, issued on Jul 21, 2017. Check the license (California A151818, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Yumi Mendez-Ishizaki
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A151818 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3828 Schaufele Ave Ste 200, Long Beach, CA 90808
- Phone
- (657) 241-8990
- Enumerated
- Jul 21, 2017
- Record last updated
- Jun 29, 2022
- Fax
- (714) 665-4600
- Medicare enrollment
- Enrolled (PECOS I20200716003061); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 3828 Schaufele Ave Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexander Burns, MDFamily Medicine Physician1740985845
- Shelly Dutt, M.D.Obstetrics & Gynecology Physician1487065215
- Rosanna Galzote-Carino, M.D.Obstetrics & Gynecology Physician1346776234
- Noreen Hussaini, M.D.Rheumatology Physician1093907198
- Thomas Jiang, M.D.Pulmonary Disease Physician1861719486
- Jimmy Johannes, M.D.Pulmonary Disease Physician1275837205
Verify Yumi Mendez-Ishizaki in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A151818Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
62 Medicare Part D claims for 25 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol18 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
- Southern California Permanente Medical GroupLancaster, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Yumi Mendez-Ishizaki among 5,088 obstetrics & gynecology physician records in California
Yumi Mendez-Ishizaki, MD 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 2017, is newer than 87% of them.
- NPI issued2017 · 87% of these records are older, 10% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2016 · 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 Long Beach → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Ruthann Devera, M.D.Long Beach, CA 908081790043289
- Shelly Dutt, M.D.Long Beach, CA 908081487065215
- Lichun Huo, MDLong Beach, CA 908081629149505
- Deborah KarmLong Beach, CA 908081124431374
- Chenita Landry, M.D.Long Beach, CA 908081093938417
- Briana LivingstonLong Beach, CA 908081992116388
- Martin Muth, M.D.Long Beach, CA 908081306830211
- Phyllis Oster, M.D.Long Beach, CA 908081902817919
Common questions
What is Yumi Mendez-Ishizaki, MD's NPI number?
Yumi Mendez-Ishizaki, MD's National Provider Identifier (NPI) is 1942723994, issued on Jul 21, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Yumi Mendez-Ishizaki, MD located?
The NPPES record lists a practice address at 3828 Schaufele Ave Ste 200, Long Beach, CA, 90808. Phone: (657) 241-8990. Providers update this record themselves, so call before visiting.
How can I verify Yumi Mendez-Ishizaki, MD's license?
NPPES lists California license number A151818, 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 Yumi Mendez-Ishizaki, MD prescribe under Medicare Part D?
In 2024, Yumi Mendez-Ishizaki, MD had 62 Medicare Part D claims for 25 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.