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

Q: What is Michael Chang's NPI number?

The NPI number for Michael Chang is 1205934262. It was assigned to this individual provider in the NPPES registry on September 20, 2006.

Q: What is Michael Chang's specialty?

The primary specialty registered for this NPI is Physical Medicine & Rehabilitation, specializing in Pain Medicine, with taxonomy code 2081P2900X.

Q: When was this NPI record last updated?

The NPPES record for Michael Chang was last updated on November 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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 September 20, 2006PECOS EnrolledAccepts Medicare Assignment

75/100

CMS Quality Rating

2405 SHADELANDS DR, WALNUT CREEK, CA 94598(925) 939-8585(925) 933-2709 Get Directions Write a Review

NPPES record last updated: November 7, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Nov 7, 2025, Sep 16, 2020 (2 updates tracked since 2020).

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About Michael Yao-jen Chang D.o. NPPES

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

MICHAEL YAO-JEN CHANG D.O. (NPI 1205934262) is an individual pain medicine provider in Walnut Creek, California, licensed in California (20A8518) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2002).

NPPES Registry Identity

NPI1205934262

Entity TypeIndividualMale

Primary Taxonomy2081P2900X

Provider Legal NameMICHAEL YAO-JEN CHANGCredential: D.O.

Location Address2405 SHADELANDS DRWalnut Creek, CA 94598-2444

Mailing AddressPo Box 31396Walnut Creek, CA 94598-8396 · (925) 939-8585 · Fax (925) 933-2709

Phone(925) 939-8585

Fax(925) 933-2709

Sole ProprietorNo

Medical School CMSOtherGraduated 2002

Enumeration DateSeptember 20, 2006

Last NPPES UpdateNovember 7, 20252 updates tracked since enumeration

NPPES CertifiedNovember 7, 2025

✔ NPI 1205934262 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysical Medicine & Rehabilitation · Pain MedicineAllopathic & Osteopathic Physicians

Taxonomy Code2081P2900X

License✔ Licensed in CA · 20A8518

Definition

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.

2405 SHADELANDS DR, Walnut Creek, CA 94598

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Secondary Practice Locations 2

Location 1101 Sand Creek Rd Ste ABrentwood, CA 94513-2539 · Phone (925) 939-8585

Location 2101 Sand Creek Rd Ste BBrentwood, CA 94513-2540 · Phone (925) 939-8585

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

Michael Yao-jen Chang D.o. 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 ID4688774664

PECOS Enrollment IDI20070703000627

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 25

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 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.

849 services557 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level 64483

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.

488 services405 patients

Needle measurement of electrical activity in arm or leg muscles, complete study 95886

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.

448 services220 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.

290 services290 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.

266 services43 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level 64484

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.

228 services198 patients

Nerve conduction, 9-10 studies 95911

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.

224 services220 patients

Mri scan of lower spinal canal without contrast 72148

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.

213 services213 patients

Injection of lower or sacral spine facet joint using imaging guidance, single level 64493

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.

123 services75 patients

Injection of lower or sacral spine facet joint using imaging guidance, second level 64494

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.

116 services69 patients

Injection of upper or middle spine facet joint using imaging guidance, single level 64490

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.

84 services49 patients

Injection of upper or middle spine facet joint using imaging guidance, second level 64491

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.

84 services49 patients

X-ray of lower and sacral spine, minimum of 4 views 72110

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.

72 services72 patients

Injection of substance into middle or upper spine canal using imaging guidance 62321

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.

69 services67 patients

Injection of anesthetic or steroid into joint between lower spine and hip bone using imaging guidance 27096

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.

64 services49 patients

Mri scan of upper spinal canal without contrast 72141

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.

56 services56 patients

Ultrasonic guidance for needle placement 76942

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.

31 services30 patients

Mri scan of middle spinal canal without contrast 72146

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.

24 services23 patients

Injection into tendon at attachment to bone or muscle 20551

This procedure involves injecting medicine into a tendon where it attaches to bone or muscle. It's done to alleviate pain or inflammation. The injection may contain a local anesthetic or a corticosteroid to reduce swelling. It's a common treatment for various orthopedic conditions.

23 services18 patients

X-ray of lower and sacral spine, 2-3 views 72100

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.

21 services20 patients

X-ray of upper spine, 4-5 views 72050

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.

16 services16 patients

X-ray lower and sacral spine, minimum of 6 views 72114

An X-ray of the lower and sacral spine involves capturing images of the bones in your lower back and tailbone area. It helps to identify issues like fractures, infections, or degenerative diseases. A minimum of 6 views ensures a comprehensive examination.

15 services15 patients

X-ray of middle spine, 2 views 72070

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.

14 services14 patients

X-ray of upper spine, 2-3 views 72040

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.

13 services13 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

13 services13 patients

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

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.

DOUGLAS LANGE M.D.

Orthopaedic Surgery

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

DAVID ARAKAWA P.T.

Physical Therapist (Orthopedic)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

ANNA GELLER

Nurse Practitioner (Family)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

TIFFANY WATERS P.A.

Physician Assistant (Surgical)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

KELSEY MARLENE HULTS PA

Physician Assistant (Surgical)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

STEVEN S JACOBS MD INC

Anesthesiology

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

TORAL M. DESAI P.T.

Physical Therapist (Orthopedic)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

MARIO PISANI P.T.

Physical Therapist (Orthopedic)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

JOANN SEAVER P.T.

Physical Therapist (Orthopedic)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

KEVIN BYRNE PA

Physician Assistant (Surgical)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

SEQUOIA SURGICAL CENTER LP

Clinic/Center (Ambulatory Surgical)

2405 SHADELANDS DR, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 935-6700

JEROME H DAVIS M.D.

Specialist

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

ABID QURESHI M.D.

Orthopaedic Surgery (Orthopaedic Surgery of the Spine)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

THOMAS MARKIEWITH P.A.

Physician Assistant (Surgical)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

STACY LYNN WONG DPT

Physical Therapist (Sports)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

RICHARD FRIEDELL P.T.

Physical Therapist (Orthopedic)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

JULIE PRYDE P.A.

Physician Assistant (Surgical)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

JOHN KNIGHT M.D.

Orthopaedic Surgery

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

GINA NYE RNFA

Registered Nurse (Medical-Surgical)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

UNA STODDART P.T.

Physical Therapist (Orthopedic)

2405 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 939-8585

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 Michael Chang's NPI number?

The NPI number for Michael Chang is 1205934262. It was assigned to this individual provider in the NPPES registry on September 20, 2006.

Where is Michael Chang located?

Michael Chang practices at 2405 Shadelands Dr, Walnut Creek, CA 94598. The listed phone number is (925) 939-8585.

What is Michael Chang's specialty?

The primary specialty registered for this NPI is Physical Medicine & Rehabilitation, specializing in Pain Medicine, with taxonomy code 2081P2900X.

Is Michael Chang enrolled in Medicare?

Yes. Michael 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.

When was this NPI record last updated?

The NPPES record for Michael Chang was last updated on November 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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.