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

DR. CHRISTOPHER YONGSU CHANG MD
NPI 1649234824
Otolaryngology in Warrenton, VA

Q: What is Christopher Chang's NPI number?

The NPI number for Christopher Chang is 1649234824. It was assigned to this individual provider in the NPPES registry on April 14, 2006.

Q: What is Christopher Chang's specialty?

The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.

Q: When was this NPI record last updated?

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

Active since April 14, 2006PECOS Enrolled

75/100

CMS Quality Rating

550 HOSPITAL DRIVE, WARRENTON, VA 20186(540) 347-0505(540) 347-5224 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 Dr. Christopher Yongsu Chang Md NPPES

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

DR. CHRISTOPHER YONGSU CHANG MD (NPI 1649234824) is an individual otolaryngology provider in Warrenton, Virginia, licensed in Virginia (0101237204) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS, is affiliated with Novant Health Uva Health System Culpeper Med Cente, and is a graduate of Yale University School Of Medicine (2000).

NPPES Registry Identity

NPI1649234824

Entity TypeIndividualMale

Primary Taxonomy207Y00000X

Provider Legal NameDR. CHRISTOPHER YONGSU CHANGCredential: MD

Location Address550 HOSPITAL DRIVEWarrenton, VA 20186

Mailing Address550 Hospital DriveWarrenton, VA 20186 · (540) 347-0505 · Fax (540) 347-5224

Phone(540) 347-0505

Fax(540) 347-5224

Sole ProprietorNo

Medical School CMSYale University School Of MedicineGraduated 2000

Enumeration DateApril 14, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1649234824 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOtolaryngologyAllopathic & Osteopathic Physicians

Taxonomy Code207Y00000X

License✔ Licensed in VA · 0101237204

Definition

An otolaryngologist-head and neck surgeon provides comprehensive medical and surgical care for patients with diseases and disorders that affect the ears, nose, throat, the respiratory and upper alimentary systems and related structures of the head and neck. An otolaryngologist diagnoses and provides medical and/or surgical therapy or prevention of diseases, allergies, neoplasms, deformities, disorders and/or injuries of the ears, nose, sinuses, throat, respiratory and upper alimentary systems, face, jaws and the other head and neck systems. Head and neck oncology, facial plastic and reconstructive surgery and the treatment of disorders of hearing and voice are fundamental areas of expertise.

550 HOSPITAL DRIVE, Warrenton, VA 20186

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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

Dr. Christopher Yongsu Chang 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 ID5395770309

PECOS Enrollment IDI20050928001036

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 14

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.

Professional service for preparation and provision of 1 or more antigens 95165

This service involves the creation and supply of antigens, substances that stimulate your immune system to fight diseases. These antigens can be used in vaccines or allergy tests to help your body build defenses against specific health threats.

502 services18 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.

378 services289 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.

346 services346 patients

Removal of impacted ear wax 69210

Impacted ear wax removal is a safe procedure to clear blockages in the ear canal caused by hardened ear wax. A healthcare professional uses specialized tools or a gentle irrigation method to loosen and remove the wax, improving hearing and alleviating discomfort.

291 services179 patients

Diagnostic exam of voice box using a flexible endoscope 31575

This procedure involves a doctor examining your voice box using a flexible endoscope, a thin tube with a light and camera. It's inserted through your nose or mouth to visualize your throat area. It helps detect any abnormalities in your voice box, ensuring optimal vocal health.

210 services175 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.

203 services203 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.

178 services138 patients

Exam of ear using a microscope 92504

An exam of the ear using a microscope allows a detailed view of the ear structures. This non-invasive procedure helps identify issues such as infections, blockages, or ear damage. It's a safe, quick, and painless way to evaluate ear health.

170 services160 patients

Diagnostic exam of nasal passages using an endoscope 31231

A diagnostic exam of nasal passages using an endoscope is a non-invasive procedure. A small, flexible tube with a light and camera at the end, called an endoscope, is inserted into the nose. This allows the doctor to view the nasal passages and sinuses, helping to identify any issues.

168 services136 patients

Professional service for single injection of allergen 95115

A single allergen injection is a procedure where a small amount of a specific allergen is injected into your body. This is done to test your body's reaction to the allergen or to help your immune system become less sensitive to it, reducing allergic symptoms.

70 services11 patients

Repositioning exercises of head for treatment of dizziness, each day 95992

Repositioning exercises of the head help manage dizziness by training your brain to cope with the signals that trigger this sensation. Daily, gentle movements of the head and body can reduce symptoms and improve balance.

21 services20 patients

Test to measure the level of nitric oxide gas 95012

A test to measure the level of nitric oxide gas helps assess inflammation in the lungs, often linked with asthma. You'll breathe into a device, and it'll provide a reading of nitric oxide levels. This helps monitor and manage respiratory conditions.

18 services17 patients

Removal of foreign body in ear canal 69200

This procedure involves the careful extraction of an object that has become lodged in your ear canal. It is performed by a medical professional using specialized tools. The process is usually quick and painless, but may require local anesthesia depending on the situation.

13 services11 patients

Test to assess middle ear function 92567

A test to assess middle ear function, also known as an impedance audiometry, helps evaluate how well your middle ear works. It measures the movement of your eardrum in response to changes in air pressure. This can help identify issues like fluid build-up, ear infections, or eardrum perforations.

12 services12 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Novant Health Uva Health System Culpeper Med Cente

Acute Care Hospitals · Culpeper, VA

1/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number490019

Location501 Sunset LaneCulpeper, VA 22701 · Culpeper County

Emergency services Birthing friendly

Fauquier Hospital

Acute Care Hospitals · Warrenton, VA

3/5 CMS rating

OwnershipProprietary

CMS Certification Number490023

Location500 Hospital DriveWarrenton, VA 20186 · Fauquier County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20186 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

$129.04 typical visit price

range $56.19 – $170.30

Typical copayment $32.26 (range $14.04 – $42.57)

Most-billed visit code 99204

Established Patient

$70.08 typical visit price

range $18.07 – $138.91

Typical copayment $17.52 (range $4.51 – $34.72)

Most-billed visit code 99213

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.

75/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Reported Quality Measures

Acute Otitis Externa (AOE): Systemic Antimicrobial Therapy - Avoidance of Inappropriate Use

99%150 patients

Closing the Referral Loop: Receipt of Specialist Report

100%26 patients5/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 7

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

Tubing with integrated heating element for use with positive airway pressure device A4604