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DR. KAREN LEE OPPENHEIMER M.D.
NPI 1164430443
Internal Medicine in Torrance, CA

Active since August 03, 2006PECOS EnrolledAccepts Medicare Assignment
20790 MADRONA AVE, TORRANCE, CA 90503(310) 312-2831 Get Directions Write a Review

NPPES record last updated: December 1, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Karen Lee Oppenheimer M.d. NPPES

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

DR. KAREN LEE OPPENHEIMER M.D. (NPI 1164430443) is an individual internal medicine provider in Torrance, California, licensed in California (AO65288) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and is a graduate of Icahn School Of Medicine At Mount Sinai (1996).

NPPES Registry Identity

NPI1164430443
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. KAREN LEE OPPENHEIMERCredential: M.D.
Location Address20790 MADRONA AVETorrance, CA 90503-3777
Mailing Address20790 Madrona AveTorrance, CA 90503-3777 · (310) 312-2831
Phone(310) 312-2831
Sole ProprietorNo
Medical School CMSIcahn School Of Medicine At Mount SinaiGraduated 1996
Enumeration DateAugust 3, 2006
Last NPPES UpdateDecember 1, 2021
✔ NPI 1164430443 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in CA · AO65288✔ Licensed in OR · MD25727
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.
20790 MADRONA AVE, Torrance, CA 90503
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Other Identifiers 2

OtherP00411272OR · Medicare Railroad
Medicaid213267OR

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Kaiser Permanente.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Karen Lee Oppenheimer 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 ID9638119647
PECOS Enrollment IDI20050510000315, I20141014001902
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.

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
$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 12

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

QUYNH VAN T KING MD
Internal Medicine
20790 MADRONA AVE
TORRANCE, CA 90503
Los Angeles County (310) 781-2554
DR. RICARDO JIMENEZ-KIMBLE MD
Family Medicine
20790 MADRONA AVE
TORRANCE, CA 90503
Los Angeles County (800) 780-1230
SARAH FONG D.O.
Family Medicine
20790 MADRONA AVE
TORRANCE, CA 90503
Los Angeles County (833) 574-2273
DR. JENNIFER WEI LIN-NGUYEN M.D.
Pediatrics
20790 MADRONA AVE
TORRANCE, CA 90503
Los Angeles County (310) 781-2806
MR. ROBERT JOHN SPALDING PA-C
Physician Assistant
20790 MADRONA AVE
TORRANCE, CA 90503
Los Angeles County (310) 781-2829
KAISER FOUNDATION HEALTH PLAN INC
Pharmacy (Community/Retail Pharmacy)
20790 MADRONA AVE
TORRANCE, CA 90503
Los Angeles County (866) 352-8288
MATTHEW GRANT GUALENI
Student in an Organized Health Care Education/Training Program
20790 MADRONA AVE
TORRANCE, CA 90503
Los Angeles County (833) 574-2273
JENNIFER QUOCK PHARM.D.
Pharmacist
20790 MADRONA AVE
TORRANCE, CA 90503
Los Angeles County (310) 781-2534

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 Karen Oppenheimer's NPI number?

The NPI number for Karen Oppenheimer is 1164430443. It was assigned to this individual provider in the NPPES registry on August 3, 2006.

Where is Karen Oppenheimer located?

Karen Oppenheimer practices at 20790 Madrona Ave, Torrance, CA 90503. The listed phone number is (310) 312-2831.

What is Karen Oppenheimer's specialty?

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

Is Karen Oppenheimer enrolled in Medicare?

Yes. Karen Oppenheimer 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.

What insurance does Karen Oppenheimer accept?

Health plans from Kaiser Permanente list Karen Oppenheimer as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Karen Oppenheimer was last updated on December 1, 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.