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DR. IAN CHANG D.O.
NPI 1407116411
Internal Medicine - Rheumatology in Orange, CA

Active since May 23, 2012PECOS Enrolled
100/100
CMS Quality Rating
101 THE CITY DR S BLDG 30, ORANGE, CA 92868(714) 456-7720 Get Directions Write a Review

NPPES record last updated: March 29, 2023. Verified against the NPPES registry weekly; last sync: September 06, 2026.

Record update history: Mar 29, 2023, Nov 3, 2022, Apr 10, 2019 (3 updates tracked since 2019).

About Dr. Ian Chang D.o. NPPES

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

DR. IAN CHANG D.O. (NPI 1407116411) is an individual rheumatology provider in Orange, California, licensed in California (20A16850) and active in the NPI registry since May 2012. He is enrolled in Medicare PECOS and maintains a secondary practice location in East Lansing.

NPPES Registry Identity

NPI1407116411
Entity TypeIndividualMale
Primary Taxonomy207RR0500X
Provider Legal NameDR. IAN CHANGCredential: D.O.
Location Address101 THE CITY DR S BLDG 30Orange, CA 92868-3201
Mailing Address200 S Manchester Ave Ste 300Orange, CA 92868-3219 · (714) 456-2986
Phone(714) 456-7720
Sole ProprietorNo
Enumeration DateMay 23, 2012
Last NPPES UpdateMarch 29, 20233 updates tracked since enumeration
NPPES CertifiedMarch 29, 2023
✔ NPI 1407116411 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
License✔ Licensed in CA · 20A16850
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
Also ListedInternal MedicineTaxonomy 207R00000X · License 5101019682 (MI)
101 THE CITY DR S BLDG 30, Orange, CA 92868
Open in Google Maps ↗

Secondary Practice Location 1

Location 1804 Service Road, Room A225 MSU Clinical CenterEast Lansing, MI 48824 · Phone (517) 353-4941 · Fax (517) 432-3145

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Ian Chang D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 3

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 high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
86 services52 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
71 services40 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
19 services19 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92868 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality82.4
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 9

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

DR. EKAMOL TANTISATTAMO MD
Internal Medicine (Nephrology)
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-7720
DR. MICHAEL Y OH MD
Neurological Surgery
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-6966
DR. ADITI THAKKAR MBBS
Internal Medicine (Endocrinology, Diabetes & Metabolism)
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-7720
DR. IRENE TSAI M.D.
Radiology (Diagnostic Radiology)
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-2235
UTTAM G REDDY M.D.
Internal Medicine (Nephrology)
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-7720
DR. ISMAIL KASIMOGLU MD, PHD, MBA
Internal Medicine (Endocrinology, Diabetes & Metabolism)
101 THE CITY DR S BLDG 30, PAVILION 1, BLDG.30
ORANGE, CA 92868
Orange County (714) 456-7720
JULIA HSIU-LING LIANG NP
Nurse Practitioner
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-7720
DR. AHMED MOHYELDIN MD
Neurological Surgery
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-6966

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 Ian Chang's NPI number?

The NPI number for Ian Chang is 1407116411. It was assigned to this individual provider in the NPPES registry on May 23, 2012.

Where is Ian Chang located?

Ian Chang practices at 101 The City Dr S Bldg 30, Orange, CA 92868. The listed phone number is (714) 456-7720.

What is Ian Chang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Ian Chang enrolled in Medicare?

Yes. Ian Chang is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Ian Chang was last updated on March 29, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.