STEPHEN KAO LIU M.D.
NPI 1306889860
Radiology - Vascular & Interventional Radiology in Modesto, CA

Medicare Participation & PECOS Enrollment Status

Stephen Liu 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.

Stephen Liu 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: 9739077785

  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: I20070622000340

  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.

Balloon dilation of artery of leg, each additional vessel

Balloon dilation of the artery of the leg, for each additional vessel, is a procedure to open up blocked arteries. A small balloon is inserted and inflated to widen the artery, improving blood flow to the leg.

This service was performed 25 times for 19 patients

Balloon dilation of artery of leg, initial vessel

Balloon dilation of the artery of the leg is a procedure to improve blood flow. A small balloon is inserted into the leg artery and inflated to widen the vessel, allowing better circulation. This is typically the first vessel treated.

This service was performed 14 times for 12 patients

Balloon dilation of artery with review by radiologist, initial artery

Balloon dilation of an artery is a procedure where a small balloon is inserted into a narrowed artery and inflated to widen it. This improves blood flow. A radiologist reviews the procedure to ensure its success. It's typically the first artery treated.

This service was performed 43 times for 35 patients

Balloon dilation of dialysis segment with review by radiologist

Balloon dilation of a dialysis segment is a procedure where a tiny balloon is inserted and inflated in a narrowed area of your dialysis access site, improving blood flow. A radiologist reviews images to ensure success.

This service was performed 148 times for 89 patients

Balloon dilation of vein with review by radiologist, initial vein

Balloon dilation of a vein is a procedure where a small balloon is inserted into a narrowed vein. Once in place, the balloon is inflated to widen the vein and improve blood flow. The procedure is overseen by a radiologist, who uses imaging techniques to ensure accurate placement of the balloon. This is done on the initial vein requiring treatment.

This service was performed 46 times for 43 patients

Established patient office or other outpatient visit, 10-19 minutes

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.

This service was performed 13 times for 13 patients

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 133 times for 95 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 15 times for 15 patients

Fluoroscopic guidance for insertion or removal of central vein access device

Fluoroscopic guidance for central vein access device insertion or removal is a procedure where a special X-ray, called a fluoroscope, is used to help accurately place or remove a device in a central vein. This device aids in delivering medications or collecting blood samples.

This service was performed 118 times for 97 patients

Injection of substance into lower spine canal using imaging guidance

This procedure involves injecting a substance into your lower spine canal, guided by real-time images. It's done to diagnose or treat various conditions. You may feel slight discomfort, but it's generally safe and can provide valuable information for your treatment plan.

This service was performed 76 times for 49 patients

Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist

This procedure involves inserting a needle or tube into your hemodialysis circuit, a system that cleans your blood when your kidneys can't. A balloon is then used to widen a narrow section of this circuit. A radiologist reviews the procedure to ensure accuracy.

This service was performed 475 times for 279 patients

Insertion of needle and/or tube into hemodialysis circuit and insertion of stent in dialysis segment with review by radiologist

This procedure involves placing a needle or tube into your hemodialysis circuit, a system used to clean your blood when kidneys are not working properly. A stent, a small tube, is then inserted into the dialysis segment to keep it open. A radiologist reviews the process to ensure accuracy.

This service was performed 79 times for 76 patients

Insertion of needle and/or tube into hemodialysis circuit with review by radiologist

This procedure involves inserting a needle or tube into your hemodialysis circuit, which is part of the system that cleans your blood when your kidneys can't. A radiologist, a doctor specialized in imaging techniques, will review the process to ensure everything is correct.

This service was performed 33 times for 30 patients

Insertion of tube into chest or arm artery, initial second order branch

This procedure involves the insertion of a small tube into an artery in your chest or arm. The tube is guided to a second order branch, a smaller vessel branching off the main artery. This helps doctors monitor blood flow or deliver medication directly to the heart.

This service was performed 13 times for 13 patients

Insertion of tunneled central venous tube for infusion (5 years or older)

The insertion of a tunneled central venous tube is a procedure where a thin, flexible tube is placed into a large vein, usually in the neck or chest. This tube allows healthcare providers to give medications, fluids, or nutrients directly into your bloodstream over a longer period.

This service was performed 48 times for 45 patients

Leg revascularization (restoring blood flow)

Leg revascularization is a procedure aimed at restoring proper blood flow to your legs. It's often needed when blood vessels in your legs are blocked or narrowed. The process may involve surgery or less invasive methods to remove or bypass blockages, helping to alleviate pain and prevent serious complications.

This service was performed for 67 patients

Mechanical removal of obstructive material from central venous tube

This procedure involves clearing blockages from a central venous tube, a device inserted into your large veins for treatment. Obstructive material can hinder the tube's function, so medical professionals use specific techniques to remove this material and restore proper functioning.

This service was performed 59 times for 53 patients

New patient office or other outpatient visit, 30-44 minutes

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.

This service was performed 53 times for 53 patients

Removal and/or dissolving of blood clot in hemodialysis circuit and balloon dilation of dialysis segment and placement of stent with review by radiologist

This is a procedure to improve your dialysis treatment. If a blood clot blocks your dialysis circuit, it's removed or dissolved. If the dialysis segment is narrow, a balloon is used to widen it. Sometimes, a stent is placed to keep it open. A radiologist reviews all these steps to ensure accuracy.

This service was performed 44 times for 39 patients

Removal and/or dissolving of blood clot in hemodialysis circuit and balloon dilation of dialysis segment with imaging review by radiologist, with balloon tube

This procedure involves eliminating a blood clot in your hemodialysis circuit, ensuring smooth blood flow. A balloon tube is used to widen the dialysis segment if needed. Images are taken and reviewed by a radiologist to confirm successful completion.

This service was performed 66 times for 50 patients

Removal of plaque and insertion of stents in arteries of leg

This procedure, known as angioplasty, involves a small tube being inserted into your leg artery. The tube has a tiny balloon that inflates to remove plaque blocking the artery. A stent (a small mesh tube) is then placed to keep the artery open, improving blood flow.

This service was performed 26 times for 21 patients

Removal of plaque in arteries of leg

This procedure, known as atherectomy, involves clearing out plaque buildup in the leg arteries. Plaque can restrict blood flow, causing discomfort and potential health issues. A special device is inserted into the artery to carefully remove the plaque, improving blood circulation.

This service was performed 35 times for 25 patients

Removal of plaque in artery of leg, each additional vessel

This procedure involves eliminating plaque buildup in your leg arteries to improve blood flow. If more than one vessel is affected, each additional vessel will also be treated in the same session. This can help alleviate symptoms and prevent serious complications.

This service was performed 22 times for 16 patients

Removal of plaque in artery of leg, initial vessel

This procedure involves removing plaque from the initial vessel in your leg. Plaque, a build-up of fat, cholesterol, and other substances, can block blood flow. The removal process, known as an angioplasty, restores healthy blood circulation in your leg.

This service was performed 51 times for 34 patients

Removal of tunneled central venous tube

A tunneled central venous tube removal is a procedure to take out a long, thin tube that was previously placed in a large vein in your body. This tube helps deliver medication or nutrition. The removal is usually quick and done under local anesthesia.

This service was performed 69 times for 63 patients

Replacement of tunneled central venous tube

A tunneled central venous tube replacement is a procedure where an existing tube, used to deliver medication or nutrition directly to a large vein, is replaced. This is done under local anesthesia and involves inserting a new tube through a small incision.

This service was performed 52 times for 42 patients

Review by radiologist of arm or leg artery image

This procedure involves a radiologist examining images of your arm or leg arteries. These images are obtained through a non-invasive method, like an ultrasound or CT scan. The radiologist reviews these images to identify any abnormalities, such as blockages or narrowing, which can affect blood flow.

This service was performed 28 times for 27 patients

Review by radiologist of both arms or legs arteries image

This procedure involves a radiologist examining images of your arm or leg arteries. These images help identify any blockages or abnormalities in the blood vessels that could affect circulation. It's a vital step in diagnosing conditions related to blood flow.

This service was performed 40 times for 38 patients

Review by radiologist of image for removal of obstructive material

This procedure involves a radiologist examining images, such as X-rays or MRI scans, to identify any blockages in the body. The radiologist looks for any obstructions that might need to be removed to improve your health. It's a crucial step in planning your treatment.

This service was performed 55 times for 51 patients

Ultrasonic guidance for blood vessel access

Ultrasonic guidance for blood vessel access is a medical procedure where sound waves are used to create images of your blood vessels. This helps doctors to accurately locate and access the vessels for treatments or tests, ensuring safety and precision.

This service was performed 51 times for 48 patients

Ultrasound evaluation of blood vessel with review by radiologist, each additional vessel

An ultrasound evaluation of a blood vessel is a non-invasive procedure that uses sound waves to create images of your blood vessels. A radiologist reviews these images to check for any abnormalities. If additional vessels need reviewing, the process is repeated.

This service was performed 120 times for 39 patients

Ultrasound evaluation of blood vessel with review by radiologist, initial vessel

This procedure involves using ultrasound, a safe imaging technique, to examine your blood vessels. The images are then reviewed by a radiologist, a doctor specialized in medical imaging. The process helps identify any abnormalities in your initial vessel.

This service was performed 62 times for 39 patients

Ultrasound of hemodialysis access

An ultrasound of hemodialysis access is a non-invasive procedure that uses sound waves to create images of your dialysis access site. It helps monitor the access site's health and detect any potential issues like blockages or narrowing.

This service was performed 15 times for 14 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

This service was performed 946 times for 484 patients

Use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes

This service involves a physician administering medication to lower your consciousness during a procedure. It's done for your comfort and safety. The drug's effects last about 15 minutes, so additional doses may be given as needed.

This service was performed 564 times for 177 patients

Physician Visit Costs

The typical physician office visit costs for Medicare beneficiaries in this area are: $22.58 for a new patient copayment and $18.29 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 95355 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 26.6, 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: 26.6 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: 15

  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: 0

  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: 35.36

  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: 35.36

  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.

Quality Reporting

The provider participated in CMS Quality Payment Program. The Quality Payment Program aims to improve population health, reduce costs and improve the care received by Medicare beneficiaries. The following quality measures meet Medicare's statistical reporting standards. Not all providers report the same information, because not all providers give the same services to patients. The quality information is just a snapshot of some the care providers give to their patients. Reporting more or less information is not a reflection of quality.

CLIA Information

The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:

CLIA Number

05D2100470

Facility Type

Physician Office

Certificate Effective Date

August 14, 2025

Certificate Expiration Date

August 13, 2027

Laboratory Director

STEPHEN K. LIU

Certificate Type

Certificate of Waiver

Certificate Type Description

This CLIA certificate is issued to Stephen Liu to perform only waived tests. CLIA defines waived tests as simple tests with a low risk for an incorrect result. Waived tests include certain tests listed in CLIA regulations, tests cleared by the FDA for home use and tests approved by the FDA for waived status and that meet CLIA waiver criteria.

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