MICHAEL YAO-JEN CHANG D.O.
NPI 1205934262
Physical Medicine & Rehabilitation - Pain Medicine in Walnut Creek, CA


Quality Rating: 75 out of 100 score

NPI Status: Active since September 20, 2006

Contact Information

2405 SHADELANDS DR
WALNUT CREEK, CA
ZIP 94598
Phone: (925) 939-8585
Fax: (925) 933-2709

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  • Individual
  • Male
  • Years of Experience 24
  • Physical Medicine & Rehabilitation
  • Pain Medicine
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About MICHAEL CHANG

This page provides the complete NPI Profile along with additional information for Michael Chang, a provider established in Walnut Creek, California with a medical specialization in Physical Medicine & Rehabilitation, focusing in pain medicine and more than 24 years of experience. The healthcare provider is registered in the NPI registry with number 1205934262 assigned on September 2006. The practitioner's primary taxonomy code is 2081P2900X with license number 20A8518 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1205934262
Provider Name
MICHAEL YAO-JEN CHANG D.O.
Gender
Male
Entity Type
Individual
Location Address
2405 SHADELANDS DR WALNUT CREEK, CA 94598
Location Phone
(925) 939-8585
Location Fax
(925) 933-2709
Mailing Address
PO BOX 31396 WALNUT CREEK, CA 94598
Mailing Phone
(925) 939-8585
Mailing Fax
(925) 933-2709
Medical School Name
OTHER
Graduation Year
2002
Is Sole Proprietor?
No
Enumeration Date
09-20-2006
Last Update Date
11-07-2025
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Location Map

Secondary Locations

  • 101 Sand Creek Rd Ste A
    Brentwood, CA 94513
    (925) 939-8585
  • 101 Sand Creek Rd Ste B
    Brentwood, CA 94513
    (925) 939-8585

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Physical Medicine & Rehabilitation Pain Medicine

Taxonomy Code
2081P2900X
Type
Allopathic & Osteopathic Physicians
License No.
20A8518
License State
CA
Taxonomy Description
A physician who provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic or cancer pain in both hospital and ambulatory settings. Patient care needs may also be coordinated with other specialists.

Medicare Participation & PECOS Enrollment Status

Michael 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.

Michael 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: 4688774664

    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: I20070703000627

    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

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.

Aspiration and/or injection of fluid large joint using ultrasound guidance

This procedure involves using ultrasound technology to accurately locate a large joint, usually the knee or shoulder. A needle is then inserted to either extract fluid (aspiration) or inject medication. The ultrasound helps ensure precision and safety.

This service was performed 28 times for 23 patients

Destruction of lower or sacral spinal facet joint nerves using imaging guidance, single facet joint

This procedure involves using imaging guidance to accurately target and destroy nerves in the lower or sacral spinal facet joint. It's done to relieve chronic back pain. The process is safe and usually effective.

This service was performed 17 times for 12 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 992 times for 574 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level

This procedure involves injecting an anesthetic or steroid drug into the sacral spine nerve root. It's done under imaging guidance to ensure accuracy. The process can be repeated for each additional level of the spine to help manage pain or inflammation.

This service was performed 181 times for 148 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level

This procedure involves injecting a mix of numbing and anti-inflammatory medication into a specific nerve root in the lower back. It helps manage pain and reduce inflammation. The process is guided by imaging technology for precision.

This service was performed 450 times for 355 patients

Injection of anesthetic or steroid into joint between lower spine and hip bone using imaging guidance

This procedure involves injecting medicine into the joint where your lower spine meets your hip bone. Using special imaging technology, the doctor ensures the medicine is delivered accurately. This can help reduce pain and inflammation in that area.

This service was performed 55 times for 44 patients

Injection of lower or sacral spine facet joint using imaging guidance, second level

This procedure involves injecting medication into the facet joints of your lower or sacral spine to manage pain. Imaging guidance ensures accurate placement. It's the second level, meaning it's done on two different joint levels.

This service was performed 103 times for 61 patients

Injection of lower or sacral spine facet joint using imaging guidance, single level

This procedure involves injecting medication into the facet joint in your lower back or sacral spine. It's done under imaging guidance to ensure accuracy. The aim is to alleviate pain and inflammation. It's a safe, often effective method for managing spinal discomfort.

This service was performed 106 times for 63 patients

Injection of lower or sacral spine facet joint using imaging guidance, third and any additional level

This procedure involves injecting medication into the facet joints located in the lower or sacral area of your spine. It's done using imaging guidance for accuracy. The 'third and any additional level' refers to treating more than two joints during the same session.

This service was performed 21 times for 15 patients

Injection of substance into middle or upper spine canal using imaging guidance

This procedure involves injecting a substance into your middle or upper spine canal. It's performed under imaging guidance to ensure accuracy. The substance can help diagnose or treat various conditions, providing relief from symptoms.

This service was performed 50 times for 47 patients

Injection of upper or middle spine facet joint using imaging guidance, second level

This procedure involves injecting medication into the upper or middle spine facet joint, a small joint in your back. This is done under imaging guidance for precision. It's a second-level procedure, meaning it's done on two separate joints. It can help reduce pain and inflammation.

This service was performed 65 times for 42 patients

Injection of upper or middle spine facet joint using imaging guidance, single level

This procedure involves injecting medication into a joint in your upper or middle spine. It's performed under imaging guidance for precision. The aim is to reduce inflammation and pain. It's a single-level process, meaning one joint is treated at a time.

This service was performed 67 times for 44 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg

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.

This service was performed 263 times for 39 patients

Mri scan of lower spinal canal without contrast

An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.

This service was performed 128 times for 128 patients

Mri scan of middle spinal canal without contrast

An MRI scan of the middle spinal canal without contrast is a non-invasive imaging test. It uses magnetic fields and radio waves to create detailed images of your spine. This helps doctors identify any abnormalities or issues in your spinal canal. No dye is used in this procedure.

This service was performed 15 times for 15 patients

Mri scan of upper spinal canal without contrast

An MRI scan of the upper spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your upper spine. This helps doctors identify issues such as injuries, infections or diseases. No dye is used.

This service was performed 24 times for 24 patients

Needle measurement of electrical activity in arm or leg muscles, complete study

This procedure, known as an electromyography (EMG), involves inserting a small needle into your arm or leg muscles to measure their electrical activity. This complete study helps diagnose issues with nerves or muscles, providing valuable data for your treatment plan.

This service was performed 304 times for 148 patients

Nerve conduction, 9-10 studies

Nerve conduction studies involve sending small electrical shocks through the skin to measure how quickly nerves transmit signals. This helps detect nerve damage. 9-10 studies mean this process will be repeated on different nerves to gather comprehensive data.

This service was performed 151 times for 146 patients

New patient office or other outpatient visit, 45-59 minutes

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.

This service was performed 338 times for 338 patients

Ultrasonic guidance for needle placement

Ultrasonic guidance for needle placement is a technique where sound waves create images that help accurately position the needle during procedures. This method ensures precision, minimizes discomfort, and increases safety.

This service was performed 26 times for 21 patients

X-ray of lower and sacral spine, 2-3 views

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

This service was performed 49 times for 49 patients

X-ray of lower and sacral spine, minimum of 4 views

An X-ray of the lower and sacral spine involves capturing images of your lower back and tailbone area. It helps in identifying issues like fractures, arthritis, or other abnormalities. At least four different angles or 'views' are taken to get a comprehensive picture.

This service was performed 102 times for 102 patients

X-ray of middle spine, 2 views

An X-ray of the middle spine, or thoracic spine, involves capturing two different images of the area. This non-invasive procedure uses small amounts of radiation to visualize the bones and tissues in your back, helping to identify any abnormalities or injuries.

This service was performed 24 times for 23 patients

X-ray of upper spine, 2-3 views

An X-ray of the upper spine, with 2-3 views, is a painless procedure that employs a small amount of radiation to capture images of your neck and upper back. It assists in diagnosing conditions like arthritis, fractures, or spinal deformities.

This service was performed 11 times for 11 patients

X-ray of upper spine, 4-5 views

An X-ray of the upper spine with 4-5 views is a non-invasive imaging test. It uses radiation to capture detailed images of the bones and structures in your neck and upper back. This procedure helps identify issues like fractures, infections, or deformities.

This service was performed 37 times for 37 patients

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 75, 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: 75 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: N/A

    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: N/A

    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 NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1205934262, we treat the final digit (2) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 58. The final step is to find the difference between that total and the next multiple of ten (60 - 58 = 2).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
2
Unchanged
Pos 3
0
Doubled → 0
Pos 4
5
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
3
Unchanged
Pos 7
4
Doubled → 8
Pos 8
2
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
2
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 0 → 0 9 → 18 → 9 4 → 8 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 2 + 0 + 5 + 1 + 8 + 3 + 8 + 2 + 1 + 2 + 24 = 58

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 58 is 60. The difference is the calculated check digit.

60 - 58 = 2
This NPI is valid
The calculated check digit is 2, which matches the last digit of 1205934262.

Other Providers at the Same Location


The following 19 providers are registered at the same or a nearby location.

Specialist
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Specialist
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physician Assistant (Surgical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Anesthesiology
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physician Assistant (Medical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Registered Nurse (Medical-Surgical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Registered Nurse (Medical-Surgical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physician Assistant (Surgical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physician Assistant (Surgical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Sports)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physical Therapist (Orthopedic)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598
Physician Assistant (Surgical)
2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1205934262, enumerated as an "individual" on September 20, 2006.

The provider is located at 2405 SHADELANDS DR WALNUT CREEK, CA 94598 and the phone number is (925) 939-8585.

Physical Medicine & Rehabilitation with taxonomy code 2081P2900X and a focus in Pain Medicine.