Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

MR. KARL KEN FUKUNAGA MD
NPI 1487644613
Internal Medicine - Gastroenterology in Torrance, CA

Q: What is Karl Fukunaga's NPI number?

The NPI number for Karl Fukunaga is 1487644613. It was assigned to this individual provider in the NPPES registry on October 27, 2005.

Q: What is Karl Fukunaga's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Karl Fukunaga was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since October 27, 2005PECOS Enrolled

23451 MADISON ST, SUITE 290, TORRANCE, CA 90505(310) 375-1246(310) 375-0590 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

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About Mr. Karl Ken Fukunaga Md NPPES

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

MR. KARL KEN FUKUNAGA MD (NPI 1487644613) is an individual gastroenterology provider in Torrance, California, licensed in California (G72161) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS and is a graduate of University Of California, Irvine, California College Of Medicine (1989).

NPPES Registry Identity

NPI1487644613

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameMR. KARL KEN FUKUNAGACredential: MD

Location Address23451 MADISON ST, SUITE 290Torrance, CA 90505-4763

Mailing Address23451 Madison St, Suite 290Torrance, CA 90505-4763 · (310) 375-1246 · Fax (310) 375-0590

Phone(310) 375-1246

Fax(310) 375-0590

Sole ProprietorNo

Medical School CMSUniversity Of California, Irvine, California College Of MedicineGraduated 1989

Enumeration DateOctober 27, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1487644613 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in CA · G72161

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

23451 MADISON ST, Torrance, CA 90505

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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

Mr. Karl Ken Fukunaga 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 ID7719975440

PECOS Enrollment IDI20040503000928

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.

Areas of Expertise CMS Part B claims 13

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.

Pathology examination of tissue using a microscope, intermediate complexity 88305

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

302 services131 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

220 services138 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

115 services115 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

114 services112 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

78 services78 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

63 services27 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

60 services58 patients

Measurement of liver stiffness 91200

Measurement of liver stiffness is a non-invasive procedure that helps assess the health of your liver. It uses sound waves to detect the hardness of the liver tissue, which can indicate conditions like fibrosis or cirrhosis. It's a simple, painless test that provides valuable information about your liver's health.

36 services36 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

30 services30 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

27 services27 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

26 services24 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

16 services16 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

16 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90505 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.

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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.

BLISS MEDICAL GROUP, P.C.

Family Medicine

23451 MADISON ST, SUITE 250
TORRANCE, CA 90505

Los Angeles County (310) 791-0083

TORRANCE NEUROSCAN MEDICAL GROUP

Psychiatry & Neurology (Neurology)

23451 MADISON ST, 205
TORRANCE, CA 90505

Los Angeles County (310) 373-9944

CARDIAC, THORACIC, AND VASCULAR SURGEONS OF THE SOUTH BAY

Thoracic Surgery (Cardiothoracic Vascular Surgery)

23451 MADISON ST, SUITE 300
TORRANCE, CA 90505

Los Angeles County (310) 378-7373

DR. CARL WAGREICH D.P.M.

Podiatrist (Foot & Ankle Surgery)

23451 MADISON ST, STE 230
TORRANCE, CA 90505

Los Angeles County (310) 373-0521

KATHERINE EUNJU LEE M.D., F.A.A.F.P

Family Medicine

23451 MADISON ST, STE 250
TORRANCE, CA 90505

Los Angeles County (310) 791-0083

JANELLE ROBLES MACASIEB PA-C

Physician Assistant

23451 MADISON ST, SUITE 290
TORRANCE, CA 90505

Los Angeles County (310) 375-1246

AMIR KAVIANI M.D.

Surgery (Vascular Surgery)

23451 MADISON ST, SUITE #340
TORRANCE, CA 90505

Los Angeles County (310) 373-6864

JASON PHAN DDS INC.

Dentist (Endodontics)

23451 MADISON ST, STE 210
TORRANCE, CA 90505

Los Angeles County (310) 378-8342

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 Karl Fukunaga's NPI number?

The NPI number for Karl Fukunaga is 1487644613. It was assigned to this individual provider in the NPPES registry on October 27, 2005.

Where is Karl Fukunaga located?

Karl Fukunaga practices at 23451 Madison St Suite 290, Torrance, CA 90505. The listed phone number is (310) 375-1246.

What is Karl Fukunaga's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Karl Fukunaga enrolled in Medicare?

Yes. Karl Fukunaga 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.

When was this NPI record last updated?

The NPPES record for Karl Fukunaga was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.