JOHN M GUNDZIK M.D.
NPI 1659390995
Radiology - Diagnostic Radiology in Bakersfield, CA

Q: What is John Gundzik's NPI number?

The NPI number for John Gundzik is 1659390995. It was assigned to this individual provider in the NPPES registry on July 18, 2006.

Q: What is John Gundzik's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Q: When was this NPI record last updated?

The NPPES record for John Gundzik was last updated on August 16, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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 July 18, 2006PECOS EnrolledAccepts Medicare Assignment

92.58/100

CMS Quality Rating

2301 BAHAMAS DR, BAKERSFIELD, CA 93309(661) 326-9600(661) 334-3065 Get Directions Write a Review

NPPES record last updated: August 16, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About John M Gundzik M.d. NPPES

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

JOHN M GUNDZIK M.D. (NPI 1659390995) is an individual diagnostic radiology provider in Bakersfield, California, licensed in California (A51755) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Cincinnati College Of Medicine (1986).

NPPES Registry Identity

NPI1659390995

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameJOHN M GUNDZIKCredential: M.D.

Location Address2301 BAHAMAS DRBakersfield, CA 93309-0663

Mailing Address2301 Bahamas DrBakersfield, CA 93309-0663 · (661) 326-9600 · Fax (661) 334-3065

Phone(661) 326-9600

Fax(661) 334-3065

Sole ProprietorNo

Medical School CMSUniversity Of Cincinnati College Of MedicineGraduated 1986

Enumeration DateJuly 18, 2006

Last NPPES UpdateAugust 16, 2011

✔ NPI 1659390995 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

License✔ Licensed in CA · A51755

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

2301 BAHAMAS DR, Bakersfield, CA 93309

Open in Google Maps ↗

Other Identifiers 1

Medicare UPINE28651

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

John M Gundzik M.d. 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 ID7517904832

PECOS Enrollment IDI20081209000459

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 John Gundzik reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Kern Radiology Medical Group, Inc

Same address

Diagnostic Radiology

2301 BAHAMAS DR
Bakersfield, CA 93309

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

NPI 1720023997 (661) 322-9958

San Fernando Valley Interventional Radiology And Imaging Center

90 mi

Vascular-Interventional Technology

16311 VENTURA BLVD STE 120
Encino, CA 91436

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

NPI 1942350889 (310) 445-2951

Pronet Imaging Medical Group, Inc.

97 mi

Diagnostic Radiology

1516 COTNER AVE
Los Angeles, CA 90025

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

NPI 1528099488 (310) 445-2800

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 49

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, gadoterate meglumine, 0.1 ml A9575

Gadoterate meglumine is a contrast agent used in MRI scans to help visualize certain areas of your body more clearly. It's injected into your bloodstream, typically through a vein in your arm, and helps doctors get more detailed images.

32,270 services195 patients

Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml Q9967

Low osmolar contrast material with 300-399 mg/ml iodine concentration is a diagnostic tool used in imaging procedures. It helps to enhance the visibility of specific areas in the body, aiding in accurate diagnosis. It's safe and generally well-tolerated by patients.

8,761 services97 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.

374 services350 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.

224 services221 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.

199 services196 patients

Nuclear medicine study limited area with ct scan 78814

A nuclear medicine study with a limited area CT scan is a diagnostic procedure. A small amount of radioactive substance is injected into your body, which helps create detailed images of a specific area. The CT scan further enhances these images, providing clearer, more precise results.

156 services156 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.

153 services147 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.

146 services142 patients

Ct scan head or brain without contrast 70450

114 services108 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.

107 services102 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.

98 services11 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.

82 services81 patients

Florbetapir f18, diagnostic, per study dose, up to 10 millicuries A9586

Florbetapir F18 is a radioactive diagnostic agent used in PET scans to detect beta-amyloid plaques in the brain, which are associated with Alzheimer's disease. This specific service refers to a single study dose of up to 10 millicuries.

78 services78 patients

Florbetaben f18, diagnostic, per study dose, up to 8.1 millicuries Q9983

Florbetaben F18 is a radioactive diagnostic agent used in PET scans to detect amyloid plaques, often found in Alzheimer's patients. A dose of up to 8.1 millicuries is administered for each study.

72 services72 patients

Injection, regadenoson, 0.1 mg J2785

Regadenoson injection, 0.1 mg, is a medication used to help visualize the heart during a stress test. It works by increasing blood flow in the arteries of the heart. It's injected into a vein and is generally well-tolerated.

57 services15 patients

Nuclear medicine study, spect imaging, 1 area or single acquisition, single day imaging 78803

A nuclear medicine study with SPECT involves a safe, small amount of radioactive substance to help visualize body organs. SPECT, or Single Photon Emission Computed Tomography, creates detailed 3D images. This helps doctors diagnose and monitor conditions in a specific body area.

55 services55 patients

Iodine 1-123 ioflupane, diagnostic, per study dose, up to 5 millicuries A9584

Iodine 1-123 Ioflupane is a diagnostic procedure where a small radioactive substance is introduced into your body. It helps to create clear images of your brain, specifically to study the functioning of your brain's nerve cells.

54 services54 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.

50 services49 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.

49 services48 patients

Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries A9552

Fluorodeoxyglucose F-18 FDG is a radioactive drug used in PET scans. It helps doctors see how your tissues and organs are functioning. The drug is given in a specific dose, up to 45 millicuries, depending on your body size and the type of scan.

48 services48 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.

46 services46 patients

Ct scan of upper spine without contrast 72125

A CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.

44 services43 patients

Nuclear medicine study of brain with metabolic evaluation 78608

A nuclear medicine study of the brain with metabolic evaluation involves using a safe radioactive substance and special imaging to assess brain function. It helps identify changes in brain metabolism that can indicate certain disorders.

44 services44 patients

Mri scan of blood vessels of neck without contrast 70547

An MRI scan of the neck's blood vessels without contrast is a non-invasive procedure that uses magnetic fields to create detailed images of your neck's blood vessels. It helps identify any abnormalities or blockages, aiding in accurate diagnosis and treatment planning.

39 services39 patients

Ct scan of lower spine without contrast 72131

A CT scan of the lower spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed images of your lower back area, helping to detect conditions like fractures, infections, or tumors. It's painless and generally quick.

37 services37 patients

Mri scan of brain without contrast 70551

35 services33 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.

32 services32 patients

Single contrast x-ray of esophagus 74220

A single contrast x-ray of the esophagus is a non-invasive procedure where a radiopaque substance is swallowed to highlight the esophagus. This allows doctors to capture clear images of the area, aiding in the diagnosis of any abnormalities or issues.

30 services30 patients

Technetium tc-99m sestamibi, diagnostic, per study dose A9500

Technetium Tc-99m Sestamibi is a diagnostic test used to create images of your heart or breast tissues. It involves a safe radioactive substance injection that helps doctors to detect any abnormalities or changes in these tissues.

30 services29 patients

Ct scan of upper spine without contrast 72125

27 services27 patients

Single contrast x-ray of upper digestive tract 74240

A single contrast x-ray of the upper digestive tract is a diagnostic procedure that uses a special dye and x-rays to see how your digestive system is functioning. It helps in detecting abnormalities or diseases in your esophagus, stomach, and the first part of your small intestine.

27 services26 patients

Mri scan of upper spinal canal before and after contrast 72156

An MRI scan of the upper spinal canal before and after contrast is a non-invasive imaging test. It uses magnetic fields and radio waves to create detailed images of your spine. Contrast dye is injected to enhance these images, providing clearer visuals for accurate diagnosis.

24 services24 patients

Mri scan of lower spinal canal before and after contrast 72158

An MRI scan of the lower spinal canal with contrast is a non-invasive imaging procedure. It uses magnetic fields to generate detailed images of your lower spine. A contrast agent is injected to enhance these images, helping doctors see issues more clearly.

21 services21 patients

Ct scan of abdomen and pelvis without contrast 74176

A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.

21 services21 patients

Ct scan of face without contrast 70486

A CT scan of the face without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your face, including bones, soft tissues, and blood vessels. It's often used to diagnose diseases, injuries, or abnormalities. No contrast dye is used in this procedure.

20 services20 patients

Technetium tc-99m medronate, diagnostic, per study dose, up to 30 millicuries A9503

Technetium Tc-99m Medronate is a diagnostic procedure that uses a small amount of radioactive material to examine the health of your bones. It helps to detect bone diseases or abnormalities. The procedure is safe, with the radioactive substance naturally leaving your body after the test.

17 services16 patients

Mri scan of middle spinal canal before and after contrast 72157

An MRI scan of the middle spinal canal with contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your spine, both before and after a contrast dye is injected. The dye helps to highlight certain structures, providing a clearer picture for diagnosis.

16 services16 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.

15 services14 patients

Nuclear medicine study of parathyroid 78070

A nuclear medicine study of the parathyroid involves injecting a small amount of radioactive substance into the body. This substance helps create images of the parathyroid glands, which regulate calcium levels in the body, to detect any abnormalities or diseases.

15 services15 patients

Nuclear medicine studies of heart muscle at rest and with stress and spect 78452

Nuclear medicine studies of the heart involve two parts: rest and stress. During rest, images are taken of your heart at ease. During stress, images are taken after exercise or medication-induced stress. SPECT is a special imaging technique providing 3D pictures of your heart, helping identify any issues.

15 services15 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.

14 services12 patients

Ct scan of middle spine without contrast 72128

A CT scan of the middle spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed pictures of your mid-spine area. This scan helps doctors identify issues like fractures, tumors, or infections. No dye is used in this procedure.

14 services14 patients

Ct scan of abdomen and pelvis with contrast 74177

A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.

14 services14 patients

Fluoroscopic guidance for needle placement 77002

Fluoroscopic guidance for needle placement is a medical procedure that uses a special X-ray technology to help accurately place a needle in the body. It's often used in biopsies, injections or other treatments to ensure precision and safety.

14 services13 patients

Technetium tc-99m mebrofenin, diagnostic, per study dose, up to 15 millicuries A9537

Technetium Tc-99m Mebrofenin is a diagnostic test used to assess your liver function. A small amount of a radioactive substance is injected into your body, which helps create images of your liver for detailed examination. It's safe and essential for accurate diagnosis.

14 services14 patients

Ct scan of blood vessels of head with contrast 70496

12 services12 patients

Ct scan of blood vessels of neck with contrast 70498

12 services12 patients

Mri scan of blood vessels of head before and after contrast 70546

An MRI scan of the head's blood vessels before and after contrast involves capturing detailed images of these vessels. A harmless dye (contrast) is used to enhance these images, helping doctors identify any abnormalities more clearly. No radiation is involved.

12 services12 patients

Ct scan of head or brain before and after contrast 70470

A CT scan of the head or brain uses special X-ray equipment to create detailed images of your brain's structure. Before and after contrast means two scans are done. Initially, images are taken without a contrast dye. Then, a dye is given to highlight certain areas, providing a clearer picture.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93309 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

$91.09 typical visit price

range $59.26 – $178.09

Typical copayment $22.77 (range $14.81 – $44.52)

Most-billed visit code 99203

Established Patient

$73.67 typical visit price

range $19.34 – $145.64

Typical copayment $18.41 (range $4.83 – $36.41)

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.

92.58/100

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

Scored as part of a group practice

Quality

Promoting Interoperability

100

Improvement Activities

Other Providers at the Same Location NPPES 16

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

DR. ALAN MORTEZAIE M.D.

Radiology (Diagnostic Radiology)