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KAREN CHANG DO
NPI 1861855439
Internal Medicine - Gastroenterology in Rialto, CA

Active since March 31, 2016PECOS EnrolledAccepts Medicare Assignment
2006 N RIVERSIDE AVE STE B, RIALTO, CA 92377(909) 644-4035(909) 881-0668 Get Directions Write a Review

NPPES record last updated: January 18, 2024. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 14, 2020, Mar 31, 2016 (2 updates tracked since 2016).

About Karen Chang Do NPPES

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

KAREN CHANG DO (NPI 1861855439) is an individual gastroenterology provider in Rialto, California, licensed in California (20A16468) and active in the NPI registry since March 2016. She is enrolled in Medicare PECOS and is a graduate of Lake Erie College Of Osteopathic Medicine, Erie (2016).

NPPES Registry Identity

NPI1861855439
Entity TypeIndividualFemale
Primary Taxonomy207RG0100X
Provider Legal NameKAREN CHANGCredential: DO
Location Address2006 N RIVERSIDE AVE STE BRialto, CA 92377-4697
Mailing Address2006 N Riverside Ave Ste BRialto, CA 92377-4697
Phone(909) 644-4035
Fax(909) 881-0668
Sole ProprietorNo
Medical School CMSLake Erie College Of Osteopathic Medicine, ErieGraduated 2016
Enumeration DateMarch 31, 2016
Last NPPES UpdateJanuary 18, 20242 updates tracked since enumeration
NPPES CertifiedJanuary 18, 2024
✔ NPI 1861855439 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 · 20A16468
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.
2006 N RIVERSIDE AVE STE B, Rialto, CA 92377
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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

Karen Chang Do 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 ID6204257462
PECOS Enrollment IDI20200527000683
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 6

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.

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.
116 services78 patients
Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152
This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.
40 services39 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.
35 services35 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.
23 services23 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.
17 services17 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.
17 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92377 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
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
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 3

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

MS. IRA PAULINE SANTOS PA-C
Physician Assistant
2006 N RIVERSIDE AVE STE B
RIALTO, CA 92377
San Bernardino County (909) 644-4063
GABRIELA ALEXANDRA ARMENTA PA-C
Physician Assistant
2006 N RIVERSIDE AVE STE B
RIALTO, CA 92377
San Bernardino County (909) 644-4063
CARLOS ANDRES BUITRAGO MD
Internal Medicine (Gastroenterology)
2006 N RIVERSIDE AVE STE B
RIALTO, CA 92377
San Bernardino County (909) 644-4063

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 Chang's NPI number?

The NPI number for Karen Chang is 1861855439. It was assigned to this individual provider in the NPPES registry on March 31, 2016.

Where is Karen Chang located?

Karen Chang practices at 2006 N Riverside Ave Ste B, Rialto, CA 92377. The listed phone number is (909) 644-4035.

What is Karen Chang's specialty?

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

Is Karen Chang enrolled in Medicare?

Yes. Karen Chang 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 Karen Chang was last updated on January 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.