Medicare Enrolled
Dr. Puneet Chandak, M.D.
Nuclear Medicine · Fremont, CA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Chandak from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
Are you Dr. Chandak?
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What this data tells you about Dr. Chandak
Dr. Puneet Chandak is a nuclear medicine specialist in Fremont, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Chandak performed 61,294 Medicare services across 9,823 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chandak received a total of $793 from 13 pharmaceutical and/or device companies across 14 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in nuclear medicine. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Chandak is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 19 years in practice
▲ Top 1% volume in CA
$793 industry payments
Medicare Practice Summary
Medicare Utilization ↗61,294
Medicare services
Top 1% in CA for nuclear medicine
9,823
Unique beneficiaries
$51
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~3,226 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Contrast dye for imaging (iodine-based) A contrast agent containing 300-399 mg/ml of iodine used to enhance imaging studies. It is administered per milliliter to improve the visibility of internal structures. |
42,000 | $0 | $1 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
4,549 | $14 | $50 |
| Gadobenate dimeglumine injection Administration of gadobenate dimeglumine, a contrast agent used to enhance imaging results. |
3,495 | $1 | $20 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
1,477 | $34 | $100 |
| Regadenoson injection (Lexiscan) for heart stress test An injection of regadenoson, a medication used to stress the heart during diagnostic testing. |
1,433 | $43 | $95 |
| CT scan of heart for calcium evaluation A CT scan of the heart used to evaluate calcium levels in the blood vessels. |
699 | $90 | $250 |
| Rubidium rb-82, diagnostic, per study dose, up to 60 millicuries | 634 | $407 | $1,250 |
| CT scan of chest, without contrast A computed tomography scan of the chest area that uses X-rays to create detailed images without the use of contrast dye. |
395 | $118 | $592 |
| Aminophylline injection, up to 250 mg Administration of aminophylline medication via injection for a dose of up to 250 mg. |
370 | $7 | $15 |
| Exercise or drug-induced heart stress test with ECG A heart stress test performed using exercise or medication while monitoring the electrocardiogram under physician supervision and review. |
365 | $60 | $200 |
| Nuclear medicine scan from skull base to mid-thigh with CT A nuclear medicine imaging study covering the area from the base of the skull to the middle of the thighs, performed alongside a CT scan. |
329 | $1,525 | $2,500 |
| Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries | 329 | $281 | $802 |
| Nuclear stress test with CT scan A nuclear medicine imaging test that evaluates blood flow in the heart muscle at rest and during stress, performed alongside a concurrent CT scan. |
326 | $1,666 | $3,003 |
| PET scan of heart muscle blood flow A nuclear medicine imaging test that uses positron emission tomography (PET) to evaluate blood flow within the heart muscle. |
317 | $121 | $300 |
| 3D radiographic procedure with computerized image postprocessing A radiographic imaging procedure that creates three-dimensional images using computerized processing of the captured data. |
315 | $68 | $250 |
| Piflufolastat F-18 diagnostic injection A diagnostic injection of the radioactive tracer piflufolastat F-18 used for imaging. The dose specified is 1 millicurie. |
288 | $489 | $1,397 |
| CT scan of abdomen and pelvis with contrast A CT scan of the abdomen and pelvis using contrast dye before and after administration to visualize internal structures. |
267 | $318 | $800 |
| CT scan of chest with and without contrast A computed tomography scan of the chest performed using both intravenous contrast dye and without it to provide detailed images of internal structures. |
224 | $180 | $1,000 |
| Technetium Tc-99m tetrofosmin diagnostic injection A diagnostic injection of Technetium Tc-99m tetrofosmin used for imaging studies. |
212 | $76 | $200 |
| MRI scan of brain, without contrast A magnetic resonance imaging test of the brain that does not use contrast dye. This procedure creates detailed images of the brain's structure using magnetic fields and radio waves. |
201 | $167 | $700 |
| MRI of lower spine, without contrast A magnetic resonance imaging scan of the lower spinal canal that does not use contrast dye to create detailed images of the spine. |
152 | $161 | $1,000 |
| Chest X-ray, 2 views An X-ray imaging test of the chest that captures two different angles to visualize the lungs, heart, and chest wall. |
138 | $26 | $100 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in the arm or leg. The test uses sound waves to check blood flow and may include compression and other maneuvers. |
118 | $169 | $496 |
| MRI of leg joint, without contrast A magnetic resonance imaging scan of a joint in the leg performed without the use of contrast dye. |
114 | $179 | $800 |
| MRI of brain with and without contrast An MRI scan of the brain using contrast dye both before and after administration to provide detailed images of brain structures. |
109 | $287 | $1,200 |
| MRI of upper spine without contrast An MRI scan of the upper spinal canal that does not use contrast dye. This imaging test uses magnetic fields and radio waves to create detailed pictures of the spine. |
107 | $168 | $1,000 |
| Nuclear stress test of heart muscle A nuclear medicine imaging test that evaluates blood flow to the heart muscle at rest and during stress using a special camera. |
106 | $386 | $1,245 |
| MRI of abdomen with and without contrast An MRI scan of the abdomen using contrast dye before and after administration to create detailed images of internal structures. |
102 | $314 | $1,010 |
| Nuclear medicine study with CT scan A nuclear medicine imaging test performed on a specific body area combined with a CT scan. |
102 | $1,616 | $5,000 |
| MRI of head blood vessels without contrast An MRI scan that creates detailed images of the blood vessels in the head without using contrast dye. |
95 | $205 | $1,000 |
| MRI of pelvis with and without contrast A magnetic resonance imaging scan of the pelvic area performed both before and after the administration of a contrast dye to enhance image detail. |
94 | $308 | $1,100 |
| MRI of arm joint, without contrast An MRI scan uses magnetic fields and radio waves to create detailed images of the arm joint. This specific procedure is performed without the use of a contrast dye. |
72 | $171 | $1,000 |
| Ultrasound of head and neck blood flow, bilateral An ultrasound exam that uses sound waves to visualize and assess blood flow in the vessels of both the head and the neck. |
72 | $160 | $640 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
71 | $94 | $198 |
| SPECT nuclear medicine scan, 1 area A nuclear medicine imaging test using a single photon emission computed tomography (SPECT) scan to create detailed images of one specific area of the body. |
70 | $325 | $640 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
69 | $97 | $277 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
69 | $168 | $575 |
| CT scan of abdomen and pelvis, without contrast A computed tomography scan that creates detailed images of the abdominal and pelvic organs. The procedure is performed without the use of intravenous contrast dye. |
63 | $162 | $500 |
| CT scan of head/brain, without contrast A CT scan uses X-rays to create detailed images of the head or brain without the use of contrast dye. |
56 | $89 | $500 |
| MRI of middle spinal canal, without contrast This procedure uses magnetic resonance imaging to create detailed pictures of the middle section of the spinal canal. It is performed without the use of contrast dye. |
56 | $159 | $1,000 |
| Complete ultrasound of brain blood flow An ultrasound test that evaluates blood flow within the brain's blood vessels. It uses sound waves to create images of the vessels and assess circulation. |
55 | $192 | $500 |
| Ultrasound of brain blood flow following medication An ultrasound test used to assess blood flow within the brain after a medication has been administered. |
55 | $232 | $450 |
| Ultrasound of brain blood flow An ultrasound test used to examine blood flow within the brain to check for blood clots. |
55 | $147 | $500 |
| Ultrasound of arm and leg arteries A non-invasive imaging test that uses sound waves to examine the blood vessels in the arms and legs. It evaluates blood flow and checks for blockages or other vascular issues. |
55 | $110 | $358 |
| Ultrasound of leg arteries or grafts An imaging test that uses sound waves to create pictures of the blood vessels in the legs or any surgical grafts present. |
55 | $202 | $490 |
| Ultrasound of arm arteries or grafts An ultrasound exam of the arteries in one arm or any arterial grafts present. This imaging test uses sound waves to visualize blood flow and vessel structure. |
55 | $95 | $295 |
| Florbetapir F18 diagnostic injection A nuclear medicine imaging study using Florbetapir F18 to visualize amyloid plaques in the brain. The procedure involves administering a diagnostic dose of up to 10 millicuries. |
53 | $2,553 | $4,151 |
| Low dose CT scan of chest for lung cancer screening A specialized CT scan of the chest using a lower radiation dose to screen for lung cancer. |
50 | $163 | $350 |
| Florbetaben f18, diagnostic, per study dose, up to 8.1 millicuries | 47 | $2,634 | $4,309 |
| CT scan of abdomen and pelvis with contrast A CT scan that uses dye to create detailed images of the abdomen and pelvis. This imaging test helps doctors examine internal organs and structures in these areas. |
43 | $279 | $750 |
| Bone density scan (DEXA) A test that uses low-dose X-rays to measure bone mineral density in the hip, pelvis, and spine. It helps assess bone strength and risk of fractures. |
42 | $44 | $203 |
| MRI of neck blood vessels without contrast This procedure uses magnetic resonance imaging to create detailed pictures of the blood vessels in the neck without the use of contrast dye. |
38 | $204 | $1,000 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
38 | $82 | $150 |
| Technetium Tc-99m medronate diagnostic injection An injection of Technetium Tc-99m medronate used for diagnostic imaging studies. The dose administered is up to 30 millicuries per study. |
38 | $12 | $162 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
35 | $138 | $750 |
| Whole body bone and joint nuclear medicine scan A nuclear medicine imaging test that uses a radioactive tracer to create pictures of the entire skeleton and joints. This scan helps evaluate bone health and detect abnormalities throughout the body. |
35 | $219 | $458 |
| MRI of pelvis, without contrast A magnetic resonance imaging scan of the pelvic area performed without the use of contrast dye. |
34 | $219 | $750 |
| I-123 ioflupane diagnostic injection A diagnostic injection of I-123 ioflupane used for imaging studies, with a dose up to 5 millicuries. |
34 | $2,206 | $4,000 |
| MRI of lower spine with and without contrast An MRI scan of the lower spinal canal performed both before and after the administration of contrast dye to enhance image detail. |
28 | $293 | $1,500 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in one arm or leg using compression and other maneuvers to assess blood flow and check for blockages. |
27 | $108 | $218 |
| Ultrasound of head and neck soft tissue This procedure uses sound waves to create images of the soft tissues in the head and neck area. It allows for the visualization of structures beneath the skin without using radiation. |
26 | $101 | $210 |
| MRI of abdomen without contrast An MRI scan of the abdomen that uses magnetic fields and radio waves to create detailed images of internal organs and tissues without the use of contrast dye. |
25 | $163 | $700 |
| Brain nuclear medicine study with metabolic evaluation A nuclear medicine imaging test that uses radioactive tracers to evaluate brain metabolism. This procedure helps assess how brain tissues are functioning at a metabolic level. |
24 | $1,450 | $2,500 |
| CT scan of face, without contrast A computed tomography scan that creates detailed images of the facial structures. This procedure is performed without the use of intravenous contrast dye. |
22 | $89 | $600 |
| CT scan of lower spine, without contrast A computed tomography scan that creates detailed images of the lower spine using X-rays without the use of contrast dye. |
22 | $111 | $489 |
| MRI of leg, without contrast A magnetic resonance imaging scan of the leg performed without the use of contrast dye to visualize internal structures. |
22 | $201 | $845 |
| Psychological test administration, first 30 minutes A technician administers psychological or neuropsychological testing for the first 30 minutes. |
20 | $36 | $125 |
| MRI of spinal canal with and without contrast A magnetic resonance imaging scan of the central spinal canal performed both before and after the administration of contrast dye to enhance image detail. |
18 | $286 | $1,000 |
| CT scan of chest blood vessels with contrast A CT scan that uses contrast dye to create detailed images of the blood vessels in the chest. |
17 | $219 | $1,000 |
| X-ray of upper spine, 2-3 views An X-ray imaging test of the upper spine using two to three different angles to visualize the bones and structures. |
17 | $35 | $100 |
| Shoulder X-ray, 2+ views An X-ray imaging test of the shoulder joint using at least two different angles to visualize the bones and surrounding structures. |
17 | $33 | $75 |
| CT scan of upper spine, without contrast A CT scan uses X-rays to create detailed images of the upper spine. This procedure is performed without the use of contrast dye. |
16 | $109 | $523 |
| MRI of arm without contrast An MRI scan of the arm that uses magnetic fields and radio waves to create detailed images of internal structures without the use of contrast dye. |
15 | $263 | $1,000 |
| MRI of eye socket, face, and/or neck with and without contrast This procedure uses magnetic resonance imaging to create detailed pictures of the bones in the eye socket, face, and neck. It is performed both before and after the administration of a contrast dye to enhance the images. |
14 | $315 | $1,200 |
| X-ray of lower and sacral spine, 2-3 views An X-ray imaging test that captures 2 to 3 views of the lower back and sacral spine to visualize the bones and joints in this area. |
14 | $37 | $150 |
| Knee X-ray, 1-2 views An X-ray imaging test of the knee joint using one to two different angles to visualize the bones and surrounding structures. |
14 | $29 | $150 |
| CT scan of head/brain with and without contrast A CT scan of the head or brain performed using contrast dye both before and after its administration to capture detailed images. |
13 | $142 | $700 |
| Hip X-ray, 2-3 views An X-ray imaging test of the hip joint using two to three different angles to visualize the bones and surrounding structures. |
12 | $40 | $100 |
| MRI of leg joint with and without contrast An MRI scan of a leg joint performed both before and after the administration of contrast dye to enhance image detail. |
12 | $366 | $1,000 |
| CT scan of abdomen without contrast A computed tomography scan that creates detailed images of the abdominal organs and structures. This procedure is performed without the use of intravenous contrast dye. |
11 | $113 | $568 |
| Complete pelvic ultrasound An imaging test using sound waves to create pictures of the organs and structures within the pelvis. |
11 | $81 | $235 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
0.1% high complexity
96.7% medium
3.2% routine
Industry Payment Transparency
Open Payments through 2024 ↗$793
Total received (2018-2024)
Avg $113/year across 7 years
Top 31% in CA for nuclear medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
13
Companies
14
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$793 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$110
2023
$159
2022
$15
2021
$78
2020
$118
2019
$150
2018
$163
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
HEARTFLOW, INC.
$82
Telix Pharmaceuticals
$28
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
UIH Solutions LLC
$150
Amgen Inc.
$118
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$93
HEARTFLOW, INC.
$82
Siemens Medical Solutions USA, Inc.
$79
GE HEALTHCARE
$54
Medtronic Vascular, Inc.
$53
Avid Radiopharmaceuticals, Inc.
$49
Olympus Corporation of the Americas
$31
Telix Pharmaceuticals
$28
Biogen, Inc.
$24
Canon Medical Systems USA, Inc.
$17
Life Molecular Imaging Ltd
$15
Top 3 companies account for 45.6% of all-time payments
Associated products mentioned in payments ›
ADUHELM · Aimovig · Cerianna · ClosureFast · FFRct · ILLUCCIX · LifeVest · NEURACEQ · iTIND System · uCT · uDR · uMI · uMR
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Nuclear medicines within 10 mi
35
Per 100K population
2.1
County median income
$126,240
Nearest hospital
WASHINGTON HOSPITAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Chandak is a mixed practice specialist, with above-average Medicare volume (top 1% in CA), with low-engagement industry engagement, with 19 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Chandak experienced with contrast dye for imaging (iodine-based)?
Based on Medicare claims data, Dr. Chandak performed 42,000 contrast dye for imaging (iodine-based) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Chandak receive payments from pharmaceutical companies?
Yes. Dr. Chandak received a total of $793 from 13 companies across 14 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Chandak's costs compare to other nuclear medicines in Fremont?
Dr. Chandak's average Medicare payment per service is $51. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Chandak) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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