Tilden N. Osako, MD
Nephrology Physician · Bellflower, CA
Tilden N. Osako, MD is a nephrology physician with a practice address in Bellflower, California, and NPI 1245388222, issued on Jan 8, 2007. Check the license (California A76418, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tilden N. Osako
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A76418 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9400 Rosecrans Ave, Bellflower, CA 90706
- Phone
- (562) 461-3000
- Enumerated
- Jan 8, 2007
- Record last updated
- Dec 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20101103000333); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 9400 Rosecrans Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Basil Abdelkarim, MDInternal Medicine Physician1003968454
- Le Marie Abellon, NPNurse Practitioner1144389867
- Adrian Acevedo, MDEmergency Medicine Physician1407923303
- Pravin Acharya, MDEmergency Medicine Physician1104993088
- Michele Afshar, PAPhysician Assistant1013065952
- Maria Agbing-Mamangun, MDPsychiatry Physician1063589984
Verify Tilden N. Osako in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A76418Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% fewer Medicare Part D claims than the average nephrology physician in 2024
1,337 Medicare Part D claims for 313 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Losartan Potassium136 claims
- Jardiance131 claims
- Lisinopril111 claims
- Amlodipine Besylate95 claims
- Calcitriol79 claims
- Hydralazine Hcl78 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 GroupDowney, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tilden N. Osako among 1,468 nephrology physician records in California
Tilden N. Osako, MD is one of 1,468 nephrology physician records with a practice address in California. 88% 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 52% of them.
- NPI issued2007 · 52% of these records are older, 35% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1995 · median 2001 among the 1,128 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 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Bellflower → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Joel Golden, M.D.Bellflower, CA 907061386651230
- Raffi Merjanian, MDBellflower, CA 907061649347477
- Susy Peng, MDBellflower, CA 907061245307123
- Rukhsana Siddiqi, MDBellflower, CA 907061982771838
- Edward Wang, MDBellflower, CA 907061053460477
- Shaan Anand, MDHarbor City, CA 907101417016015
- Larry Chan, MDHarbor City, CA 907101689733297
- Mi Chang, MDHarbor City, CA 907101174675557
Common questions
What is Tilden N. Osako, MD's NPI number?
Tilden N. Osako, MD's National Provider Identifier (NPI) is 1245388222, issued on Jan 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Tilden N. Osako, MD located?
The NPPES record lists a practice address at 9400 Rosecrans Ave, Bellflower, CA, 90706. Phone: (562) 461-3000. Providers update this record themselves, so call before visiting.
How can I verify Tilden N. Osako, MD's license?
NPPES lists California license number A76418, 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 Tilden N. Osako, MD prescribe under Medicare Part D?
In 2024, Tilden N. Osako, MD had 1,337 Medicare Part D claims for 313 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.