DR. THOMAS J CHANG D.P.M.
NPI 1841315736
Podiatrist - Foot & Ankle Surgery in Santa Rosa, CA

Q: What is Thomas Chang's NPI number?

The NPI number for Thomas Chang is 1841315736. It was assigned to this individual provider in the NPPES registry on March 20, 2007.

Q: What is Thomas Chang's specialty?

The primary specialty registered for this NPI is Podiatrist, specializing in Foot & Ankle Surgery, with taxonomy code 213ES0103X.

Q: When was this NPI record last updated?

The NPPES record for Thomas Chang was last updated on December 8, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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 March 20, 2007PECOS Enrolled

62.8/100

CMS Quality Rating

208 CONCOURSE BOULEVARD, SUITE 1, SANTA ROSA, CA 95403(707) 544-3400(707) 544-0137 Get Directions Write a Review

NPPES record last updated: December 8, 2016. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Dr. Thomas J Chang D.p.m. NPPES

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

DR. THOMAS J CHANG D.P.M. (NPI 1841315736) is an individual foot & ankle surgery provider in Santa Rosa, California, licensed in California (E3908) and active in the NPI registry since March 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1841315736

Entity TypeIndividualMale

Primary Taxonomy213ES0103X

Provider Legal NameDR. THOMAS J CHANGCredential: D.P.M.

Location Address208 CONCOURSE BOULEVARD, SUITE 1Santa Rosa, CA 95403-8210

Mailing Address208 Concourse Boulevard, Suite 1Santa Rosa, CA 95403-8210 · (707) 544-3400 · Fax (707) 544-0137

Phone(707) 544-3400

Fax(707) 544-0137

Sole ProprietorYes

Enumeration DateMarch 20, 2007

Last NPPES UpdateDecember 8, 2016

✔ NPI 1841315736 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPodiatrist · Foot & Ankle SurgeryPodiatric Medicine & Surgery Service Providers

Taxonomy Code213ES0103X

License✔ Licensed in CA · E3908

208 CONCOURSE BOULEVARD, Santa Rosa, CA 95403

Open in Google Maps ↗

Other Identifiers 3

Medicare UPINU44526CA

Medicare NSC6242970001CA

Medicare ID-Type Unspecified000E39080CA · Medicare

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Thomas J Chang D.p.m. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignments

Medicare enrollment records show Thomas Chang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Pnc Msk, PC

4.3 mi

Orthopaedic Surgery

3536 MENDOCINO AVE STE 300B
Santa Rosa, CA 95403

Reassigned Medicare billing, California enrollment
12 clinicians in this Medicare group

NPI 1770216855 (707) 237-3410

Bay Area Foot Care, Inc

54 mi

Foot & Ankle Surgery

2299 POST ST STE 205
San Francisco, CA 94115

Reassigned Medicare billing, California enrollment
152 clinicians in this Medicare group

NPI 1508911892 (415) 292-0638

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 24

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 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.

1,027 services477 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

911 services455 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.

480 services113 patients

Test or measurement for functional capacity, each 15 minutes 97750

This procedure measures your functional capacity, or ability to perform tasks, over 15-minute intervals. It can help identify limitations or improvements in your physical abilities. The test may involve activities like walking, lifting, or bending.

284 services136 patients

X-ray of ankle, minimum of 3 views 73610

An ankle X-ray is a quick, painless imaging test. It involves capturing at least three different images or 'views' of your ankle using small amounts of radiation. These images help identify any abnormalities or injuries, such as fractures or arthritis.

250 services126 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.

228 services179 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.

207 services207 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.

158 services158 patients

Application of short leg cast 29405

The application of a short leg cast is a procedure to stabilize and support the lower leg or foot after an injury. A special material is wrapped around the leg, hardening to form a protective shell. This helps to keep the bones in place, reduce pain, and promote healing.

97 services49 patients

Aspiration and/or injection of fluid from medium joint 20605

This procedure involves a needle being inserted into a medium-sized joint, such as a knee or shoulder, to remove (aspirate) excess fluid. Sometimes, medication may also be injected into the joint to reduce inflammation and pain.

80 services50 patients

Removal of noncancer thickened skin growth, 1 growth 11055

This procedure involves the removal of a thickened skin growth that is not cancerous. A healthcare professional will safely extract the growth, usually under local anesthesia. This process helps maintain skin health and prevent potential complications.

66 services54 patients

Removal of noncancer thickened skin growth, 2-4 growths 11056

This procedure involves the safe removal of 2-4 noncancerous thickened skin growths. It's typically done under local anesthesia. The process helps to alleviate discomfort and prevent potential complications. It's a standard, low-risk procedure.

50 services36 patients

Correction of toe joint deformity 28285

Correction of toe joint deformity is a procedure to fix misshapen toe joints. This can involve realigning the bones, removing bone or tissue, or implanting devices to improve joint function. It can help reduce pain and improve mobility.

42 services22 patients

Injection into tendon or ligament 20550

An injection into a tendon or ligament involves placing medication directly into these areas to help reduce inflammation and pain. It's often used for conditions like arthritis or tendonitis. The procedure is quick and usually involves a local anesthetic.

34 services31 patients

Aspiration and/or injection of fluid from small joint 20600

This procedure involves inserting a thin needle into a small joint to remove (aspirate) or inject fluid. It can help diagnose conditions, relieve discomfort, or administer medication directly into the joint. It's generally safe with minimal discomfort.

32 services25 patients

Removal of fingernails or toenails, 6 or more nails 11721

This procedure involves the removal of six or more fingernails or toenails. It's typically done to treat severe nail infections, persistent pain, or abnormal nail growth. Local anesthesia is used to minimize discomfort. Healing usually takes a few weeks.

31 services23 patients

Injection of anesthetic and/or steroid drug into foot nerve 64455

This procedure involves injecting a combination of anesthetic and/or steroid medication into a nerve in your foot. It's designed to alleviate pain and inflammation. You may experience temporary numbness or relief in the treated area.

29 services24 patients

X-ray of foot, 2 views 73620

An X-ray of the foot, 2 views, is a quick, painless test that produces images of the bones and structures inside your foot. Two different angles are used to provide a comprehensive view. This helps doctors diagnose fractures, infections, or other abnormalities.

24 services19 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

20 services19 patients

Fusion of big toe at joint with foot 28750

Fusion of the big toe at the joint with the foot, also known as arthrodesis, is a surgical procedure aimed at relieving pain and improving stability. It involves permanently connecting the bones of the big toe and foot, which can limit movement but often enhances comfort and function.

18 services18 patients

Simple separation of fingernail or toenail from nail bed, first nail 11730

This procedure involves the gentle removal of the first nail from its bed, often due to injury or infection. It's performed under local anesthesia to minimize discomfort. The nail will gradually regrow over time.

16 services16 patients

Injection of anesthetic agent and/or steroid into other nerve or branch 64450

This procedure involves injecting an anesthetic agent or steroid into a specific nerve or its branch. The goal is to relieve pain by reducing inflammation and numbing the area. It is commonly used for chronic pain management. The process is safe and usually quick.

15 services14 patients

Removal of deep implant from bone 20680

This procedure involves the careful extraction of an implant deeply embedded in a bone. A specialist makes a small incision, then utilizes precise instruments to reach and safely remove the implant. The area is then closed and monitored for healing.

13 services12 patients

Fusion of foot below ankle 28725

Fusion of foot below ankle, medically known as Subtalar Arthrodesis, is a surgical procedure aimed to alleviate pain and improve stability. It involves joining, or fusing, bones in the foot to reduce movement and friction. This is typically done to treat arthritis, injury, or alignment issues.

12 services12 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.

62.8/100

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

Scored as part of a group practice

Quality

65.43

Promoting Interoperability

100

Improvement Activities

Cost

10.56

Reported Quality Measures

Closing the Referral Loop: Receipt of Specialist Report

49%200 patients3/55-star benchmark: 87%

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

Lower rates are better for this measure.

100%38 patients1/55-star benchmark: 91%

Documentation of Current Medications in the Medical Record

53%3,031 patients2/55-star benchmark: 100%

Falls: Screening for Future Fall Risk

26%918 patients2/55-star benchmark: 100%

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

37%1,511 patients2/55-star benchmark: 98%

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

2%2,607 patients1/55-star benchmark: 61%

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

Patients combinedPopulations: 78% · 939 patients

Patients screened: 78% · 939 patients

83%24 patients4/55-star benchmark: 100%

Provide Patients Electronic Access to Their Health Information

86%440 patients4/55-star benchmark: 100%

Statin Therapy for the Prevention and Treatment of Cardiovascular Disease

60%80 patients2/55-star benchmark: 91%

Use of High-Risk Medications in Older Adults

Lower rates are better for this measure.

Patients appropriateDiagnosis: 0% · 955 patients

Patients totalRate: 0% · 955 patients

0%955 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

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

Walking boot, non-pneumatic, with or without joints, with or without interface material, prefabricated, off-the-shelf L4387

DME-Orthotic Devices · category DF000N

1 supplier27 claims27 services$129.07 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

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

ALEXANDRIA ELIZABETH VAN ZANDT DPT

Physical Therapist

208 CONCOURSE BOULEVARD, SUITE 2
SANTA ROSA, CA 95403

Sonoma County (707) 303-4992

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 Thomas Chang's NPI number?

The NPI number for Thomas Chang is 1841315736. It was assigned to this individual provider in the NPPES registry on March 20, 2007.

Where is Thomas Chang located?

Thomas Chang practices at 208 Concourse Boulevard Suite 1, Santa Rosa, CA 95403. The listed phone number is (707) 544-3400.

What is Thomas Chang's specialty?

The primary specialty registered for this NPI is Podiatrist, specializing in Foot & Ankle Surgery, with taxonomy code 213ES0103X.

Is Thomas Chang enrolled in Medicare?

Yes. Thomas Chang is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Thomas Chang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Chang reassigns Medicare benefits to 2 organizations: Pnc Msk, PC (Santa Rosa, CA) and Bay Area Foot Care, Inc (San Francisco, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Thomas Chang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Thomas Chang was last updated on December 8, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.