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TOMOKO OKAHARA MD
NPI 1821140286
Internal Medicine in Bellflower, CA

Active since January 17, 2007PECOS EnrolledAccepts Medicare Assignment
9400 ROSECRANS AVE, BELLFLOWER, CA 90706(562) 461-3000 Get Directions Write a Review

NPPES record last updated: December 3, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Tomoko Okahara Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

TOMOKO OKAHARA MD (NPI 1821140286) is an individual internal medicine provider in Bellflower, California, licensed in California (A74633) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS and is a graduate of Boston University School Of Medicine (1999).

NPPES Registry Identity

NPI1821140286
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameTOMOKO OKAHARACredential: MD
Location Address9400 ROSECRANS AVEBellflower, CA 90706-2246
Mailing Address9400 Rosecrans AveBellflower, CA 90706-2246 · (562) 461-3000
Phone(562) 461-3000
Sole ProprietorNo
Medical School CMSBoston University School Of MedicineGraduated 1999
Enumeration DateJanuary 17, 2007
Last NPPES UpdateDecember 3, 2021
✔ NPI 1821140286 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A74633
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
9400 ROSECRANS AVE, Bellflower, CA 90706
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Tomoko Okahara Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8628970605
PECOS Enrollment IDI20040121000562
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Tomoko Okahara reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Southern California Permanente Medical Group
Same address
Health Maintenance Organization
9400 ROSECRANS AVE
Bellflower, CA 90706
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group
NPI 1043242555 (562) 461-3000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90706 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KELLEY MABEL HWANG PHARMD
Pharmacist
9400 ROSECRANS AVE
BELLFLOWER, CA 90706
Los Angeles County (562) 461-3715
ALEXANDER MING-RAY LIN MD
Specialist
9400 ROSECRANS AVE
BELLFLOWER, CA 90706
Los Angeles County (562) 461-4195
DAVID S. CHENG MD
Otolaryngology (Plastic Surgery within the Head & Neck)
9400 ROSECRANS AVE
BELLFLOWER, CA 90706
Los Angeles County (310) 748-7712
BASIL Z. ABDELKARIM MD
Internal Medicine
9400 ROSECRANS AVE
BELLFLOWER, CA 90706
Los Angeles County (562) 461-3000
TERESA C REYES OD
Optometrist
9400 ROSECRANS AVE
BELLFLOWER, CA 90706
Los Angeles County (562) 461-3000
JANETTE P NGUYEN DPM
Podiatrist (Foot & Ankle Surgery)
9400 ROSECRANS AVE
BELLFLOWER, CA 90706
Los Angeles County (562) 461-3000
JEY J. CHUNG MD
Surgery (Vascular Surgery)
9400 ROSECRANS AVE
BELLFLOWER, CA 90706
Los Angeles County (562) 461-3000
ROBERT G. SUNDSTROM MD
Neuromusculoskeletal Medicine & OMM
9400 ROSECRANS AVE
BELLFLOWER, CA 90706
Los Angeles County (562) 461-3000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Tomoko Okahara's NPI number?

The NPI number for Tomoko Okahara is 1821140286. It was assigned to this individual provider in the NPPES registry on January 17, 2007.

Where is Tomoko Okahara located?

Tomoko Okahara practices at 9400 Rosecrans Ave, Bellflower, CA 90706. The listed phone number is (562) 461-3000.

What is Tomoko Okahara's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Tomoko Okahara enrolled in Medicare?

Yes. Tomoko Okahara is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Tomoko Okahara's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tomoko Okahara reassigns Medicare benefits to Southern California Permanente Medical Group (Bellflower, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Tomoko Okahara's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Tomoko Okahara was last updated on December 3, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.