DR. WILLIAM WEIMING CHANG D.O.
NPI 1417902149
Internal Medicine - Pulmonary Disease in San Juan Capistrano, CA

Medicare Participation & PECOS Enrollment Status

William Chang is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

William Chang is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

• Is the provider registered in PECOS? Yes

• PECOS PAC ID: 3274639091

  What is the PECOS Associate Control ID?
  A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

• PECOS Enrollment ID: I20070510000320

  What is the Provider Enrollment ID?
  The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

• Accepts Medicare Assignment? Yes

  What does it mean "accepts medicare assignment"?
  When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
  A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

• Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

• Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

• Eligible to Order or Refer a Home Health Agency (HHA): Yes

• Eligible to Order or Refer Power Mobility Devices: Yes

Provider Referred Orders for Durable Medical Equipment, Devices & Supplies

The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.

Durable Medical Equipment

• DME-Other DME (DE001N)

  Tubing with integrated heating element for use with positive airway pressure device (HCPCS:A4604)

  18 DME suppliers used 240 Medicare Claims 240 Services Paid

• DME-Other DME (DE000N)

  Oropharyngeal suction catheter, each (HCPCS:A4628)

  2 DME suppliers used 13 Medicare Claims 72 Services Paid

• DME-Other DME (DE000N)

  Canister, disposable, used with suction pump, each (HCPCS:A7000)

  2 DME suppliers used 13 Medicare Claims 24 Services Paid

• DME-Other DME (DE000N)

  Tubing, used with suction pump, each (HCPCS:A7002)

  2 DME suppliers used 13 Medicare Claims 27 Services Paid

• DME-Other DME (DE000N)

  Administration set, with small volume nonfiltered pneumatic nebulizer, disposable (HCPCS:A7003)

  3 DME suppliers used 18 Medicare Claims 31 Services Paid

• DME-Other DME (DE000N)

  Administration set, with small volume nonfiltered pneumatic nebulizer, non-disposable (HCPCS:A7005)

  2 DME suppliers used 11 Medicare Claims 11 Services Paid

• DME-Other DME (DE001N)

  Full face mask used with positive airway pressure device, each (HCPCS:A7030)

  13 DME suppliers used 79 Medicare Claims 79 Services Paid

• DME-Other DME (DE001N)

  Face mask interface, replacement for full face mask, each (HCPCS:A7031)

  13 DME suppliers used 85 Medicare Claims 235 Services Paid

• DME-Other DME (DE001N)

  Cushion for use on nasal mask interface, replacement only, each (HCPCS:A7032)

  7 DME suppliers used 69 Medicare Claims 403 Services Paid

• DME-Other DME (DE001N)

  Pillow for use on nasal cannula type interface, replacement only, pair (HCPCS:A7033)

  13 DME suppliers used 133 Medicare Claims 762 Services Paid

• DME-Other DME (DE001N)

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

  16 DME suppliers used 205 Medicare Claims 205 Services Paid

• DME-Other DME (DE001N)

  Headgear used with positive airway pressure device (HCPCS:A7035)

  19 DME suppliers used 152 Medicare Claims 152 Services Paid

• DME-Other DME (DE001N)

  Chinstrap used with positive airway pressure device (HCPCS:A7036)

  10 DME suppliers used 22 Medicare Claims 22 Services Paid

• DME-Other DME (DE001N)

  Tubing used with positive airway pressure device (HCPCS:A7037)

  5 DME suppliers used 37 Medicare Claims 37 Services Paid

• DME-Other DME (DE001N)

  Filter, disposable, used with positive airway pressure device (HCPCS:A7038)

  19 DME suppliers used 270 Medicare Claims 1575 Services Paid

• DME-Other DME (DE001N)

  Water chamber for humidifier, used with positive airway pressure device, replacement, each (HCPCS:A7046)

  18 DME suppliers used 100 Medicare Claims 100 Services Paid

• DME-Oxygen and Supplies (DC000N)

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

  5 DME suppliers used 62 Medicare Claims 62 Services Paid

• DME-Other DME (DE005N)

  Home ventilator, any type, used with non-invasive interface, (e.g., mask, chest shell) (HCPCS:E0466)

  2 DME suppliers used 35 Medicare Claims 35 Services Paid

• DME-Other DME (DE001N)

  Humidifier, heated, used with positive airway pressure device (HCPCS:E0562)

  8 DME suppliers used 18 Medicare Claims 18 Services Paid

• DME-Other DME (DE000N)

  Nebulizer, with compressor (HCPCS:E0570)

  3 DME suppliers used 82 Medicare Claims 87 Services Paid

• DME-Other DME (DE000N)

  Respiratory suction pump, home model, portable or stationary, electric (HCPCS:E0600)

  2 DME suppliers used 16 Medicare Claims 16 Services Paid

• DME-Other DME (DE001N)

  Continuous positive airway pressure (cpap) device (HCPCS:E0601)

  8 DME suppliers used 146 Medicare Claims 146 Services Paid

• DME-Oxygen and Supplies (DC002N)

  Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate (HCPCS:E1390)

  9 DME suppliers used 169 Medicare Claims 169 Services Paid

• DME-Oxygen and Supplies (DC002N)

  Portable oxygen concentrator, rental (HCPCS:E1392)

  4 DME suppliers used 78 Medicare Claims 78 Services Paid

• DME-Other DME (DE000N)

  Pharmacy dispensing fee for inhalation drug(s); per 30 days (HCPCS:Q0513)

  19 DME suppliers used 90 Medicare Claims 90 Services Paid

Unknown

• Other-Enteral and Parenteral (OB006N)

  Enteral feeding supply kit; gravity fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape (HCPCS:B4036)

  3 DME suppliers used 11 Medicare Claims 330 Services Paid

Drugs Administered Through DME

• DME-Drugs Administered Through DME (DG006N)

  Formoterol fumarate, inhalation solution, fda approved final product, non-compounded, administered through dme, unit dose form, 20 micrograms (HCPCS:J7606)

  3 DME suppliers used 24 Medicare Claims 1440 Services Paid

• DME-Drugs Administered Through DME (DG006N)

  Albuterol, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose, 1 mg (HCPCS:J7613)

  17 DME suppliers used 59 Medicare Claims 15306 Services Paid

• DME-Drugs Administered Through DME (DG006N)

  Albuterol, up to 2.5 mg and ipratropium bromide, up to 0.5 mg, fda-approved final product, non-compounded, administered through dme (HCPCS:J7620)

  6 DME suppliers used 39 Medicare Claims 4686 Services Paid

• DME-Drugs Administered Through DME (DG000N)

  Budesonide, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose form, up to 0.5 mg (HCPCS:J7626)

  6 DME suppliers used 41 Medicare Claims 2910 Services Paid

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Administration of influenza virus vaccine

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.

This service was performed 17 times for 17 patients

Critical care, each additional 30 minutes

Critical care refers to special attention given to patients facing life-threatening conditions. Each additional 30 minutes indicates the extension of this specialized care. This might include close monitoring, medication adjustments, and immediate interventions as needed.

This service was performed 48 times for 24 patients

Critical care, first 30-74 minutes

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

This service was performed 277 times for 114 patients

Established patient office or other outpatient visit, 30-39 minutes

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.

This service was performed 366 times for 217 patients

Established patient office or other outpatient visit, 40-54 minutes

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.

This service was performed 698 times for 305 patients

Evaluation of use of breathing device

The evaluation of a breathing device involves checking how effectively you're using it to manage your respiratory condition. It assesses the device's fit, your comfort, and your technique to ensure optimal results.

This service was performed 106 times for 87 patients

Extended patient service without direct patient contact, first hour

Extended patient service without direct contact refers to a healthcare service where professionals spend time reviewing your health records, consulting with other providers, or planning your care without you being present, for the first hour.

This service was performed 11 times for 11 patients

Extended patient service without direct patient contact, first hour

Extended patient service without direct contact refers to a healthcare service where professionals spend time reviewing your health records, consulting with other providers, or planning your care without you being present, for the first hour.

This service was performed 20 times for 19 patients

Follow-up hospital inpatient care per day, typically 35 minutes

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.

This service was performed 227 times for 90 patients

Influenza vaccine split virus, preservative free

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.

This service was performed 17 times for 17 patients

Initial hospital inpatient care per day, typically 70 minutes

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.

This service was performed 27 times for 27 patients

New patient office or other outpatient visit, 60-74 minutes

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.

This service was performed 74 times for 74 patients

Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or

This service refers to extended doctor visits where your healthcare provider spends additional time evaluating and managing your health beyond the primary procedure's required time. This includes each extra 15 minutes spent by the physician on the same day as the primary service.

This service was performed 62 times for 39 patients

Sleep study including heart rate, breathing, airflow, and effort

A sleep study monitors your heart rate, breathing patterns, airflow, and physical effort while you sleep. It helps identify sleep disorders by tracking your sleep stages and cycles. This data aids doctors in diagnosing and treating sleep-related issues.

This service was performed 28 times for 28 patients

Telephone medical discussion with physician, 21-30 minutes

This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.

This service was performed 276 times for 149 patients

Test for exercise-induced lung stress

An exercise-induced lung stress test assesses how your lungs respond to physical activity. During the test, you'll exercise on a treadmill or stationary bike while your heart rate, breathing, blood pressure, and oxygen levels are monitored. This helps identify any abnormal lung responses to exercise.

This service was performed 160 times for 118 patients

Test to determine lung volumes using gas dilution or washout

This test measures lung volumes by either diluting or washing out a known amount of gas in your lungs. You'll breathe in a harmless gas, then exhale. The exhaled air is analyzed to assess your lung capacity and function.

This service was performed 155 times for 146 patients

Test to determine lung volumes using sensors

This test, called spirometry, measures lung capacity using sensors. You breathe into a mouthpiece attached to a device that records the amount and rate of air you inhale and exhale. It helps diagnose and monitor lung conditions.

This service was performed 43 times for 42 patients

Test to examine how well the lungs exchange gases

This is a test called a pulmonary function test, which helps understand the efficiency of your lungs. It measures how much air your lungs can hold, how quickly you can move air in and out of your lungs, and how well your lungs put oxygen into and remove carbon dioxide from your blood.

This service was performed 197 times for 182 patients

Test to measure expiratory airflow and volume

This test, known as spirometry, assesses how well your lungs work. It measures how much air you can inhale, how much you can exhale and how quickly you can exhale. It's non-invasive and helps diagnose conditions like asthma or COPD.

This service was performed 91 times for 76 patients

Test to measure expiratory airflow and volume changes before and after medication administration

This procedure measures how air flows in and out of your lungs. It's done before and after medication to see if the treatment improves your breathing. It's a simple, non-invasive test that involves breathing into a device called a spirometer.

This service was performed 192 times for 177 patients

Test to measure rate of airflow

This test, known as spirometry, measures how much air you can breathe in and out, and how quickly you can do so. It helps assess your lung function and can be used to diagnose or monitor conditions like asthma or COPD.

This service was performed 23 times for 21 patients

Physician Visit Costs

The typical physician office visit costs for Medicare beneficiaries in this area are: $35.59 for a new patient copayment and $27.49 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 92675 ZIP code area.

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Overall MIPS Quality Performance

The provider participated in CMS Quality Payment Program under the Merit-based Incentive Payment System (MIPS) and has an overall final score of 91.39, based on four performance areas: quality, improvement activities, promoting interoperability, and cost. The purpose of this information is to help people with Medicare make informed decisions and incentivize doctors and clinicians to maximize performance.

The Merit-based Incentive Payment System (MIPS) is a way providers could use to participate in CMS Quality Payment Program (QPP). The MIPS program affects clinician reimbursement for Part B covered professional services and also rewards them for improving the quality of patient care and outcomes.

• Final Score: 91.39 out of 100

  The MIPS program evaluates providers across multiple categories with a specific weight for each category resulting a in a MIPS final score that ranges from 0 to 100 points. The MIPS Final Score determines whether providers receive a negative, neutral or positive MIPS payment adjustment.
  
  

• Quality Score: 81.47

  The Quality category assesses providers performance on clinical practices and patient outcomes under the traditional MIPS program. The quality measures help identify the quality of healthcare processes, outcomes, and patient experiences. The Quality measure category compromises 40% providers final MPIS scores.
  
  There are six collection types for MIPS quality measures: Electronic Clinical Quality Measures (eCQMs), MIPS Clinical Quality Measures (CQMs), Qualified Clinical Data Registry (QCDR) Measures, Medicare Part B claims measures, CMS Web Interface measures and The Consumer Assessment of Healthcare Providers and Systems (CAHPS) for MIPS Survey.
  
  

• Promoting Interoperability Score: N/A

  The Interoperability category measures the providers ability to use technology to exchange and make use of healthcare information in a way that is less burdensome and improves outcomes. The Interoperability measure category compromises 25% providers final MPIS scores.
  
  The MIPS Interoperability measure focuses on the use of certified electronic health record technology (CEHRT) to improve patient access health information, the exchange of information between clinicians and pharmacies and the systematic collection, analysis, and interpretation of healthcare data.

• Improvement Activities Score: 40

  The Improvement Activities performance category evaluates the providers participation in clinical activities that support the improvement of clinical practice, care delivery, and outcomes. Providers have the option to choose 2 to 4 activities from an inventory of over 100 improvement activities. Providers typically choose the activities that best fit their needs. The improvement activities measure category compromises 15% providers final MPIS scores.
  
  The Improvement measures aim to better patient engagement, patient safety and other areas of patient care. The Improvement Activities category compromises 15% of providers final MPIS scores.

• Cost Score: N/A

  The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.
  
  Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

• Cost Score: N/A

  The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.
  
  Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

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NPI Validation Check Digit Calculation

The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

The NPI number 1417902149 is valid because the calculated check digit 9 using the Luhn validation algorithm matches the last digit of the original NPI number.

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Frequently Asked Questions