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DR. DENISE AKIMI ISHIMARU M.D.
NPI 1225219066
Obstetrics & Gynecology in Torrance, CA

Active since November 20, 2007PECOS EnrolledAccepts Medicare Assignment
20911 EARL ST, SUITE 220, TORRANCE, CA 90503(310) 540-9600(310) 540-6282 Get Directions Write a Review

NPPES record last updated: November 30, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 30, 2021, Apr 15, 2021 (2 updates tracked since 2021).

About Dr. Denise Akimi Ishimaru M.d. NPPES

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

DR. DENISE AKIMI ISHIMARU M.D. (NPI 1225219066) is an individual obstetrics & gynecology provider in Torrance, California, licensed in California (A92469) and active in the NPI registry since November 2007. She is enrolled in Medicare PECOS and is a graduate of Other (2004).

NPPES Registry Identity

NPI1225219066
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. DENISE AKIMI ISHIMARUCredential: M.D.
Location Address20911 EARL ST, SUITE 220Torrance, CA 90503-4352
Mailing Address20911 Earl St, Suite 220Torrance, CA 90503-4352 · (310) 540-9600 · Fax (310) 540-6282
Phone(310) 540-9600
Fax(310) 540-6282
Sole ProprietorNo
Medical School CMSOtherGraduated 2004
Enumeration DateNovember 20, 2007
Last NPPES UpdateNovember 30, 20212 updates tracked since enumeration
NPPES CertifiedNovember 30, 2021
✔ NPI 1225219066 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CA · A92469
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
20911 EARL ST, Torrance, CA 90503
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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

Dr. Denise Akimi Ishimaru M.d. 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 ID840351797
PECOS Enrollment IDI20081210000440
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 Reassignments

2

Medicare enrollment records show Denise Ishimaru reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Providence Medical Institute
0.2 mi
Family Medicine
4101 TORRANCE BLVD
Torrance, CA 90503
  • Reassigned Medicare billing, California enrollment
  • 266 clinicians in this Medicare group
NPI 1235182569 (310) 793-8075
Obhg California, P.C.
2,048 mi
Obstetrics & Gynecology
777 LOWNDES HILL RD BLDG 1
Greenville, SC 29607
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Obhg California PC
  • 711 clinicians in this Medicare group
NPI 1215258892 (800) 967-2289

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

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101
This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.
22 services22 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90503 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
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
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.

SOUTHBAY ENDOCRINE MEDICAL ASSOCIATES INC.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
20911 EARL ST, SUITE 340
TORRANCE, CA 90503
Los Angeles County (310) 802-7002
JOHN M. KENNEDY, M.D., INC.
Internal Medicine (Cardiovascular Disease)
20911 EARL ST, 200
TORRANCE, CA 90503
Los Angeles County (310) 909-4687
MR. KHAJA R. AHMED M.D.
Internal Medicine (Nephrology)
20911 EARL ST, SUITE 180
TORRANCE, CA 90503
Los Angeles County (310) 370-4660
UROLOGY ASSOC SOUTH BAY INC
Urology (Pediatric Urology)
20911 EARL ST, SUITE 140
TORRANCE, CA 90503
Los Angeles County (310) 542-0199
TIMOTHY F. LESSER MD
Urology
20911 EARL ST, SUITE 140
TORRANCE, CA 90503
Los Angeles County (323) 783-4011
DONALD W. INADOMI, MD, INC
Internal Medicine (Nephrology)
20911 EARL ST, SUITE 320
TORRANCE, CA 90503
Los Angeles County (310) 542-7997
STEVEN E DAVIS M.D.
Otolaryngology
20911 EARL ST, SUITE #470
TORRANCE, CA 90503
Los Angeles County (310) 372-0700
BAHMAN BANDARI MD
Internal Medicine
20911 EARL ST, SUITE 440
TORRANCE, CA 90503
Los Angeles County (310) 419-8585

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 Denise Ishimaru's NPI number?

The NPI number for Denise Ishimaru is 1225219066. It was assigned to this individual provider in the NPPES registry on November 20, 2007.

Where is Denise Ishimaru located?

Denise Ishimaru practices at 20911 Earl St Suite 220, Torrance, CA 90503. The listed phone number is (310) 540-9600.

What is Denise Ishimaru's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Denise Ishimaru enrolled in Medicare?

Yes. Denise Ishimaru 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 organizations bill Medicare for Denise Ishimaru's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Denise Ishimaru reassigns Medicare benefits to 2 organizations: Providence Medical Institute (Torrance, CA) and Obhg California, P.C. (Greenville, SC). Each 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 Denise Ishimaru'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 Denise Ishimaru was last updated on November 30, 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.