DR. BAYARD WON CHANG M.D.
NPI 1104816255
Internal Medicine in Sacramento, CA

Q: What is Bayard Chang's NPI number?

The NPI number for Bayard Chang is 1104816255. It was assigned to this individual provider in the NPPES registry on October 28, 2005.

Q: What is Bayard Chang's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Bayard Chang was last updated on January 25, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.

Active since October 28, 2005PECOS EnrolledAccepts Medicare AssignmentCLIA 05D0940776 · Waiver

78.46/100

CMS Quality Rating

500 UNIVERSITY AVE, SUITE 111, SACRAMENTO, CA 95825(916) 929-2526(916) 929-6128 Get Directions Write a Review

NPPES record last updated: January 25, 2008. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Dr. Bayard Won Chang M.d. NPPES

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

DR. BAYARD WON CHANG M.D. (NPI 1104816255) is an individual internal medicine provider in Sacramento, California, licensed in California (G064347) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through February 16, 2028, and is a graduate of Georgetown University School Of Medicine (1987).

NPPES Registry Identity

NPI1104816255

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. BAYARD WON CHANGCredential: M.D.

Location Address500 UNIVERSITY AVE, SUITE 111Sacramento, CA 95825-6504

Mailing Address500 University Ave, Suite 111Sacramento, CA 95825-6504 · (916) 929-2526 · Fax (916) 929-6128

Phone(916) 929-2526

Fax(916) 929-6128

Sole ProprietorYes

Medical School CMSGeorgetown University School Of MedicineGraduated 1987

Enumeration DateOctober 28, 2005

Last NPPES UpdateJanuary 25, 2008

✔ NPI 1104816255 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 · G064347

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.

500 UNIVERSITY AVE, Sacramento, CA 95825

Open in Google Maps ↗

Other Identifiers 2

Medicare ID-Type Unspecified00G643470CA

Medicare UPINF02367CA

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. Bayard Won Chang M.d. 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 ID8123043569

PECOS Enrollment IDI20051014000811

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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 05D0940776

Bayard W Chang MD Inc · Sacramento, CA

Active · expires Feb 16, 2028

CLIA Number05D0940776

Laboratory TypePhysician Office

Certificate Effective DateFebruary 17, 2026

Certificate Expiration DateFebruary 16, 2028

Laboratory DirectorBayard W. Chang MD

Laboratory Phone(916) 929-2526

Laboratory LocationBayard W Chang MD Inc500 University Ave Suite 111, Sacramento, CA 95825

CLIA data matches this NPI record on: Address Phone

This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 17

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.

Injection, denosumab, 1 mg J0897

Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.

4,860 services43 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.

577 services279 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

376 services345 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.

365 services364 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

276 services274 patients

Influenza vaccine split virus, preservative free 90662

The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.

273 services271 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

224 services50 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.

176 services125 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

157 services56 patients

Stool analysis for blood to screen for colon tumors 82270

A stool analysis for blood is a non-invasive procedure used to check for the presence of hidden blood in your stool. This can be an early sign of colon tumors. The test involves collecting a small sample of stool at home and sending it to a lab for analysis.

150 services150 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.

72 services64 patients

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

55 services41 patients

Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and G0180

This is a service where a doctor or authorized practitioner certifies that you require Medicare-covered home health services. They will communicate with the home health agency and review reports on your health status to ensure you receive appropriate care. This does not involve an in-person visit.

26 services24 patients

Urinalysis, manual test 81002

A urinalysis is a simple, non-invasive test that checks the urine for various elements such as sugar, protein, and signs of infection. It can help detect many common conditions, including kidney disease and diabetes. The manual test involves a lab technician examining a urine sample.

22 services17 patients

Destruction of precancer skin growth, 1 growth 17000

"Destruction of precancer skin growth" is a procedure that eliminates a single precancerous skin growth. This is done to prevent it from developing into skin cancer. The growth may be removed using various methods such as cryotherapy (freezing), laser therapy, or topical medications.

18 services17 patients

Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use 90677

The Pneumococcal Conjugate Vaccine (PCV20) is a shot given to protect against 20 types of bacteria that can cause serious infections like pneumonia and meningitis. It's administered through a muscle, usually in the arm. It's important for overall health.

16 services16 patients

Administration of pneumococcal vaccine G0009

The pneumococcal vaccine helps protect against pneumococcal bacteria, which can cause severe infections like pneumonia and meningitis. The vaccine is given as an injection, typically in the arm. It's recommended for infants, older adults, and those with certain health conditions.

16 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95825 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

$137.20 typical visit price

range $60.44 – $180.85

Typical copayment $34.30 (range $15.11 – $45.21)

Most-billed visit code 99204

Established Patient

$105.95 typical visit price

range $19.88 – $148.15

Typical copayment $26.48 (range $4.97 – $37.03)

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.

78.46/100

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

Individually scored

Quality

93.38

Promoting Interoperability

100

Improvement Activities

Cost

34.83

Reported Quality Measures

Appropriate Treatment for Upper Respiratory Infection (URI)

58%24 patients3/55-star benchmark: 100%

Breast Cancer Screening

91%174 patients4/55-star benchmark: 93%

Cervical Cancer Screening

78%80 patients4/55-star benchmark: 98%

Closing the Referral Loop: Receipt of Specialist Report

4%379 patients1/55-star benchmark: 87%

Colorectal Cancer Screening

63%386 patients3/55-star benchmark: 88%

Controlling High Blood Pressure

70%278 patients4/55-star benchmark: 91%

Diabetes: Eye Exam

21%160 patients1/55-star benchmark: 100%

Diabetes: Hemoglobin A1c (HbA1c) Poor Control (>9%)

Lower rates are better for this measure.

54%160 patients3/55-star benchmark: 91%

Documentation of Current Medications in the Medical Record

91%1,821 patients4/55-star benchmark: 100%

e-Prescribing

99%5,836 patients4/55-star benchmark: 100%

Falls: Screening for Future Fall Risk

4%482 patients1/55-star benchmark: 100%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

40%711 patients2/55-star benchmark: 98%

Preventive Care and Screening: Screening for Depression and Follow-Up Plan

1%564 patients1/55-star benchmark: 97%

Preventive Care and Screening: Screening for High Blood Pressure and Follow-Up Documented

33%938 patients3/55-star benchmark: 61%

Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention

Patients screened: 98% · 593 patients

96%593 patients

Provide Patients Electronic Access to Their Health Information

100%748 patients5/55-star benchmark: 100%

Use of High-Risk Medications in Older Adults

Lower rates are better for this measure.

Patients appropriateDiagnosis: 15% · 491 patients

Patients totalRate: 26% · 491 patients

22%491 patients2/55-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 10

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

10 suppliers35 claims96 services$5.90 avg. paid by Medicare

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

DME-Other DME · category DE001N

4 suppliers12 claims12 services$34.21 avg. paid by Medicare

Cushion for use on nasal mask interface, replacement only, each A7032

DME-Other DME · category DE001N

3 suppliers13 claims56 services$15.79 avg. paid by Medicare

Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034

DME-Other DME · category DE001N

4 suppliers14 claims14 services$44.80 avg. paid by Medicare

Filter, disposable, used with positive airway pressure device A7038

DME-Other DME · category DE001N

5 suppliers14 claims84 services$1.63 avg. paid by Medicare

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

1 supplier12 claims12 services$13.62 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 20

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

PHILIP WILLIAMS POOR M.D.

Internal Medicine

500 UNIVERSITY AVE, STE 240
SACRAMENTO, CA 95825

Sacramento County (916) 923-2600

INTRAOPERATIVE MONITORING SERVICES

Specialist

500 UNIVERSITY AVE, #100
SACRAMENTO, CA 95825

Sacramento County (916) 648-3996

SACRAMENTO HEART & VASCULAR MEDICAL

Internal Medicine (Cardiovascular Disease)

500 UNIVERSITY AVE
SACRAMENTO, CA 95825

Sacramento County (916) 830-2000

RADIOLOGICAL ASSOCIATES OF SACRAMENTO MEDICAL GROUP INC.

Urology

500 UNIVERSITY AVE, 200
SACRAMENTO, CA 95825

Sacramento County (916) 921-1615

JOHN R. NIENOW, M.D., INC

Internal Medicine

500 UNIVERSITY AVE, 200
SACRAMENTO, CA 95825

Sacramento County (916) 679-3693

EARL F TOWLE R.N.

Nurse Practitioner

500 UNIVERSITY AVE
SACRAMENTO, CA 95825

Sacramento County (916) 830-2000

JEFFRY H JONES MD INC

Internal Medicine (Pulmonary Disease)

500 UNIVERSITY AVE, SUITE 260
SACRAMENTO, CA 95825

Sacramento County (916) 925-2096

STEVEN FERRIS KELSO DPM

Podiatrist (Foot & Ankle Surgery)

500 UNIVERSITY AVE, SUITE 200
SACRAMENTO, CA 95825

Sacramento County (916) 922-3668

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 Bayard Chang's NPI number?

The NPI number for Bayard Chang is 1104816255. It was assigned to this individual provider in the NPPES registry on October 28, 2005.

Where is Bayard Chang located?

Bayard Chang practices at 500 University Ave Suite 111, Sacramento, CA 95825. The listed phone number is (916) 929-2526.

What is Bayard Chang's specialty?

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

Is Bayard Chang enrolled in Medicare?

Yes. Bayard 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.

Does Bayard Chang hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D0940776) is associated with this NPI, valid through February 16, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Bayard Chang was last updated on January 25, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.

About Dr. Bayard Won Chang M.d. NPPES

NPPES Registry Identity

Specialties & Licenses

Other Identifiers 2

Medicare Participation & PECOS CMS

Medicare Enrollment Status

CLIA Laboratory Certificates CMS CLIA

Certificate of Waiver · 05D0940776

Areas of Expertise CMS Part B claims 17

Physician Visit Costs CMS claims · ZIP area

Medicare Quality Performance CMS QPP · MIPS

Reported Quality Measures

Referred Medical Equipment & Supplies CMS DME claims 10

Other Providers at the Same Location NPPES 20

Frequently Asked Questions NPPES & CMS

What is Bayard Chang's NPI number?

Where is Bayard Chang located?

What is Bayard Chang's specialty?

Is Bayard Chang enrolled in Medicare?

Does Bayard Chang hold a CLIA laboratory certificate?

When was this NPI record last updated?

Certificate of Waiver 05D0940776