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IHONG CHEN MD
NPI 1104822535
Internal Medicine in Fountain Valley, CA

Active since June 21, 2005PECOS EnrolledAccepts Medicare Assignment
18785 BROOKHURST ST., SUITE 200, FOUNTAIN VALLEY, CA 92708(714) 378-5330(657) 276-4743 Get Directions Write a Review

NPPES record last updated: June 12, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Ihong Chen Md NPPES

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

IHONG CHEN MD (NPI 1104822535) is an individual internal medicine provider in Fountain Valley, California, licensed in California (A49721) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS and is a graduate of University Of Texas Medical School At San Antonio (1988).

NPPES Registry Identity

NPI1104822535
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameIHONG CHENCredential: MD
Location Address18785 BROOKHURST ST., SUITE 200Fountain Valley, CA 92708
Mailing Address18785 Brookhurst St., Suite 200Fountain Valley, CA 92708 · (714) 378-5330 · Fax (657) 276-4743
Phone(714) 378-5330
Fax(657) 276-4743
Sole ProprietorNo
Medical School CMSUniversity Of Texas Medical School At San AntonioGraduated 1988
Enumeration DateJune 21, 2005
Last NPPES UpdateJune 12, 2026
NPPES CertifiedJune 12, 2026
✔ NPI 1104822535 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 · A49721
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.
18785 BROOKHURST ST., SUITE 200, Fountain Valley, CA 92708
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Other Identifiers 1

Other00A497210CA · Medi Cal #

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

Ihong Chen 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 ID8022097880
PECOS Enrollment IDI20040715000631
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 Ihong Chen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Memorialcare Medical Foundation
1.5 mi
Clinic/Center
17360 BROOKHURST ST
Fountain Valley, CA 92708
  • Reassigned Medicare billing, California enrollment
  • 948 clinicians in this Medicare group
NPI 1205167350 (877) 696-3622

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 10

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.

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.
212 services116 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
162 services105 patients
Advance care planning, first 30 minutes 99497
Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.
83 services83 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
61 services61 patients
Annual depression screening, 5 to 15 minutes G0444
An annual depression screening is a short, routine evaluation to check for signs of depression. It involves answering a series of questions about your feelings, thoughts, and behaviors. The process takes about 15 minutes and helps detect depression early for better management.
50 services50 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.
30 services27 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92708 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.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
5 suppliers15 claims31 services$5.32 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 4

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

MARGARET ZIMMERMAN MD
Pediatrics
18785 BROOKHURST ST., SUITE 200
FOUNTAIN VALLEY, CA 92708
Orange County (714) 378-5330
DR. MARIA SILVIA MARTINEZ-WIKEFELDT M.D.
Pediatrics
18785 BROOKHURST ST., SUITE 200
FOUNTAIN VALLEY, CA 92708
Orange County (714) 378-5330
LALITA M. KOMANAPALLI MD
Internal Medicine
18785 BROOKHURST ST., SUITE 200
FOUNTAIN VALLEY, CA 92708
Orange County (714) 378-5330
DR. JOHN WEIJUNE WANG M.D.
Internal Medicine
18785 BROOKHURST ST., SUITE 200
FOUNTAIN VALLEY, CA 92708
Orange County (714) 378-5330

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 Ihong Chen's NPI number?

The NPI number for Ihong Chen is 1104822535. It was assigned to this individual provider in the NPPES registry on June 21, 2005.

Where is Ihong Chen located?

Ihong Chen practices at 18785 Brookhurst St., Suite 200, Fountain Valley, CA 92708. The listed phone number is (714) 378-5330.

What is Ihong Chen's specialty?

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

Is Ihong Chen enrolled in Medicare?

Yes. Ihong Chen 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 Ihong Chen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ihong Chen reassigns Medicare benefits to Memorialcare Medical Foundation (Fountain Valley, 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 Ihong Chen'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 Ihong Chen was last updated on June 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.