DR. ERIK GAENSLER MD
NPI 1376598474
Radiology - Vascular & Interventional Radiology in Walnut Creek, CA

Q: What is Erik Gaensler's NPI number?

The NPI number for Erik Gaensler is 1376598474. It was assigned to this individual provider in the NPPES registry on May 24, 2006.

Q: What is Erik Gaensler's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Vascular & Interventional Radiology, with taxonomy code 2085R0204X.

Q: When was this NPI record last updated?

The NPPES record for Erik Gaensler was last updated on December 12, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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 May 24, 2006PECOS EnrolledAccepts Medicare Assignment

90.81/100

CMS Quality Rating

2125 OAK GROVE RD, SUITE 200, WALNUT CREEK, CA 94598(925) 296-7150(925) 296-7171 Get Directions Write a Review

NPPES record last updated: December 12, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

On this page

About Dr. Erik Gaensler Md NPPES

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

DR. ERIK GAENSLER MD (NPI 1376598474) is an individual vascular & interventional radiology provider in Walnut Creek, California, licensed in California (G56651) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (1984).

NPPES Registry Identity

NPI1376598474

Entity TypeIndividualMale

Primary Taxonomy2085R0204X

Provider Legal NameDR. ERIK GAENSLERCredential: MD

Location Address2125 OAK GROVE RD, SUITE 200Walnut Creek, CA 94598-2536

Mailing Address2125 Oak Grove Rd, Suite 200Walnut Creek, CA 94598-2536 · (925) 296-7150 · Fax (925) 296-7171

Phone(925) 296-7150

Fax(925) 296-7171

Sole ProprietorNo

Medical School CMSHarvard Medical SchoolGraduated 1984

Enumeration DateMay 24, 2006

Last NPPES UpdateDecember 12, 2023

NPPES CertifiedDecember 12, 2023

✔ NPI 1376598474 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · Vascular & Interventional RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0204X

License✔ Licensed in CA · G56651

Definition

A radiologist who diagnoses and treats diseases by various radiologic imaging modalities. These include fluoroscopy, digital radiography, computed tomography, sonography and magnetic resonance imaging.

Also ListedRadiology · Diagnostic RadiologyTaxonomy 2085R0202X · License G56651 (CA)

2125 OAK GROVE RD, Walnut Creek, CA 94598

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Erik Gaensler Md 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 ID6507941234

PECOS Enrollment IDI20080305000548

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 Erik Gaensler reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Bay Imaging Consultants Medical Group Inc

Same address

Diagnostic Radiology

2125 OAK GROVE RD STE 200
Walnut Creek, CA 94598

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

NPI 1831756139 (925) 296-7150

John Muir Magnetic Imaging Center

1.7 mi

Diagnostic Radiology

1601 YGNACIO VALLEY RD
Walnut Creek, CA 94598

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

NPI 1235184110 (925) 296-7156

John Muir Trauma Physicians Billing Service

1.7 mi

Trauma Surgery

1601 YGNACIO VALLEY RD
Walnut Creek, CA 94598

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

NPI 1962551861 (925) 947-5331

Magnetic Imaging Affiliates, LLC

15 mi

Diagnostic Radiology

5730 TELEGRAPH AVE
Oakland, CA 94609

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

NPI 1487040770 (510) 204-2744

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 42

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.

Injection, gadobutrol, 0.1 ml A9585

Gadobutrol is a contrast agent used during MRI scans to help provide clearer images. It's injected into your vein before the scan. This helps doctors to see certain areas more clearly for better diagnosis. It's generally safe with few side effects.

10,559 services134 patients

X-ray of chest, 1 view 71045

A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.

370 services353 patients

Mri scan of brain without contrast 70551

An MRI scan of the brain without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your brain. It helps in detecting abnormalities like tumors, stroke, inflammation, or infection.

175 services174 patients

Ct scan head or brain without contrast 70450

A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.

149 services148 patients

Mri scan of brain before and after contrast 70553

An MRI scan of the brain, both before and after contrast, helps visualize different brain structures. Initially, images are taken without a contrast agent. Then, a safe dye is injected which helps highlight certain areas, providing clearer, more detailed images.

125 services122 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

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.

69 services67 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

60 services60 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.

59 services58 patients

X-ray of chest, 2 views 71046

54 services54 patients

Mri scan of brain without contrast 70551

48 services48 patients

Ultrasound of both sides of head and neck blood flow 93880

An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.

34 services34 patients

Ultrasound study of arm or leg veins with compression and maneuvers 93970

An ultrasound study of arm or leg veins with compression and maneuvers is a non-invasive procedure that uses sound waves to create images of your veins. This helps identify blood clots or other vein problems. During the procedure, pressure is applied to the veins and certain movements are performed to assess blood flow.

33 services33 patients

Fluoroscopic guidance for insertion or removal of central vein access device 77001

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.

32 services29 patients

Aspiration of fluid from chest cavity using imaging guidance 32555

This procedure, known as a thoracentesis, involves removing fluid from the space between the lungs and chest wall, called the pleural space. It's performed under imaging guidance to ensure precision. It can help diagnose conditions or relieve symptoms like shortness of breath.

31 services28 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.

29 services26 patients

Ultrasonic guidance for blood vessel access 76937

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.

28 services26 patients

Mri scan of brain before and after contrast 70553

27 services27 patients

X-ray of knee, 3 views 73562

An X-ray of the knee, 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the knee from three different angles. This helps medical professionals to diagnose and monitor conditions like arthritis, fractures, or infections. The process is quick and painless.

25 services22 patients

Drainage of fluid from abdominal cavity using imaging guidance 49083

This procedure involves removing excess fluid from your abdominal cavity, which can relieve discomfort. A specialist uses imaging technology to guide a thin needle into the right spot. The fluid is then drained out safely.

24 services15 patients

X-ray of knee, 3 views 73562

22 services18 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

22 services22 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.

21 services21 patients

X-ray of hip, 2-3 views 73502

20 services19 patients

X-ray of abdomen, 1 view 74018

An X-ray of the abdomen, 1 view, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the structures in your abdomen, such as the stomach, liver, and intestines. This can help identify issues like blockages, infections, or injuries.

20 services19 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

18 services17 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.

18 services17 patients

Fine needle aspiration biopsy using ultrasound guidance, first growth 10005

Fine needle aspiration biopsy with ultrasound guidance is a procedure where a thin needle is inserted into a growth to extract a small sample. Ultrasound helps accurately locate the growth. This sample is then analyzed to determine the nature of the growth.

17 services17 patients

Insertion of central venous tube with port (5 years or older) 36561

A central venous tube with port is a small, flexible tube inserted into a large vein, usually in the chest. It allows for easy administration of medication, fluids, or blood products over a long period. A port is attached under the skin for easy access. It's safe for individuals aged 5 and above.

17 services16 patients

Removal of spinal fluid with lower back spinal tap for diagnostic test using imaging guidance 62328

A lower back spinal tap, guided by imaging, is a procedure to collect spinal fluid for testing. A needle is carefully inserted into the lower back to draw out fluid. This can help diagnose various conditions. It's performed under local anesthesia to minimize discomfort.

17 services17 patients

Ct scan of blood vessels of head with contrast 70496

A CT scan of the head's blood vessels with contrast is a diagnostic procedure. A special dye (contrast) is injected into your body to make the blood vessels visible on the scan. This helps identify issues like blockages or abnormalities in your head's blood vessels.

17 services17 patients

Ct scan of blood vessels of neck with contrast 70498

A CT scan of the neck's blood vessels with contrast is a diagnostic procedure. It uses X-rays and a special dye to create detailed images of your neck's blood vessels. This helps doctors detect issues such as blockages or abnormalities.

17 services17 patients

Ct scan of blood vessels of chest with contrast 71275

A CT scan of the chest with contrast is a non-invasive imaging test. It uses X-rays and a special dye to get detailed images of your blood vessels in the chest. This helps in diagnosing conditions related to heart and lungs.

17 services17 patients

Complete ultrasound scan behind abdominal cavity 76770

A complete ultrasound scan behind the abdominal cavity is a non-invasive imaging procedure. It uses sound waves to create pictures of the structures and organs located at the back of your abdomen. It helps in diagnosing health conditions and monitoring ongoing treatments.

17 services17 patients

Mri scan of blood vessels of head without contrast 70544

An MRI scan of the head's blood vessels without contrast is a non-invasive imaging procedure. It uses a magnetic field and radio waves to create detailed images of the blood vessels in your head. This helps doctors diagnose conditions such as stroke, aneurysm, or other vascular disorders.

16 services16 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

16 services16 patients

X-ray of shoulder, minimum of 2 views 73030

16 services15 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.

14 services14 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.

13 services13 patients

X-ray of hand, minimum of 3 views 73130

An X-ray of the hand, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones in your hand from different angles. This helps in diagnosing fractures, infections, arthritis, or other abnormalities. It's quick and painless.

13 services12 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.

12 services12 patients

Imaging for evaluation of swallowing function 74230

This process, known as a swallowing study, uses imaging technology to view how food and liquid move from your mouth to your stomach. It helps identify any issues you may have swallowing, which can be crucial for determining the best treatment plan.

12 services12 patients

Complete ultrasound scan behind abdominal cavity 76770

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94598 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$104.51 typical visit price

range $69.00 – $202.35

Typical copayment $26.12 (range $17.25 – $50.58)

Most-billed visit code 99203

Established Patient

$84.91 typical visit price

range $23.44 – $166.46

Typical copayment $21.22 (range $5.86 – $41.61)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

90.81/100

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

Scored as part of a group practice

Quality

85.12

Improvement Activities

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.

DR. PHILIP J. RICH MD

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, #200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

DR. JONATHAN FISH M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

DR. JOSEPH CHAN M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

DR. ASEEM OM RAWAL M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

CHRISTOPHER C LEE MD

Radiology (Vascular & Interventional Radiology)

2125 OAK GROVE RD, #200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

SUNIL GANDHI M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

DR. RALPH WESLEY MUTCHLER M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, #200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

DR. SANGEETA GAMBHIR M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, #200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

MARK KUANG-MIAN TU M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

DR. RONALD CHAN M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

DR. RUBY CHANG M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

DR. KEYVAN NOURI M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

JOAN REYNOLDS M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

KEITH EDWIN-MOSUN TAO M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-1756

ANGELO CRUDALE MD

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

DR. NORMAN MOSCOW

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

STEPHEN HESSELTINE M.D.

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

SIVA P RAMAN

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, STE 200
WALNUT CREEK, CA 94598

Contra Costa County (410) 955-5173

DR. DANIEL KIM M.D.

Radiology (Vascular & Interventional Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

DR. KIMBERLY M. BLUMBERG M.D

Radiology (Diagnostic Radiology)

2125 OAK GROVE RD, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 296-7150

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 Erik Gaensler's NPI number?

The NPI number for Erik Gaensler is 1376598474. It was assigned to this individual provider in the NPPES registry on May 24, 2006.

Where is Erik Gaensler located?

Erik Gaensler practices at 2125 Oak Grove Rd Suite 200, Walnut Creek, CA 94598. The listed phone number is (925) 296-7150.

What is Erik Gaensler's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Vascular & Interventional Radiology, with taxonomy code 2085R0204X.

Is Erik Gaensler enrolled in Medicare?

Yes. Erik Gaensler 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.

Which organizations bill Medicare for Erik Gaensler's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Erik Gaensler reassigns Medicare benefits to 4 organizations: Bay Imaging Consultants Medical Group Inc (Walnut Creek, CA), John Muir Magnetic Imaging Center (Walnut Creek, CA), John Muir Trauma Physicians Billing Service (Walnut Creek, CA) and Magnetic Imaging Affiliates, LLC (Oakland, 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 Erik Gaensler'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 Erik Gaensler was last updated on December 12, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.