Medicare Enrolled
Dr. Alexander Guo, M.D.
Body Imaging Physician · Placerville, 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. Guo 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. Guo?
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What this data tells you about Dr. Guo
Dr. Alexander Guo is a body imaging physician in Placerville, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Guo performed 3,244 Medicare services across 3,078 unique beneficiaries.
Between the years covered by Open Payments, Dr. Guo received a total of $106 from 2 pharmaceutical and/or device companies across 2 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in body imaging physician. 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. Guo 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 35% volume in CA
$106 industry payments
Medicare Practice Summary
Medicare Utilization ↗3,244
Medicare services
Top 35% in CA for body imaging physician
3,078
Unique beneficiaries
$28
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~171 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 |
|---|---|---|---|
| Chest X-ray, 1 view An X-ray image of the chest taken from a single angle. This imaging test is used to visualize the structures within the chest cavity. |
385 | $7 | $35 |
| 3D screening mammography (tomosynthesis) A screening imaging test of the breast using 3D technology to detect potential abnormalities. |
312 | $29 | $114 |
| Screening mammography An X-ray of the breast used to detect breast cancer in women who have no signs or symptoms of the disease. |
312 | $37 | $129 |
| 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. |
290 | $30 | $223 |
| 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. |
247 | $10 | $51 |
| 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. |
79 | $16 | $92 |
| 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. |
78 | $34 | $262 |
| 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. |
74 | $65 | $384 |
| CT scan of neck blood vessels with contrast A computed tomography scan that uses dye to visualize the blood vessels in the neck. This imaging test helps examine the structure and flow within the neck's vascular system. |
63 | $62 | $368 |
| 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. |
63 | $89 | $542 |
| 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. |
61 | $58 | $450 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
61 | $25 | $155 |
| CT scan of head blood vessels with contrast A CT scan that uses contrast dye to create detailed images of the blood vessels in the head. |
60 | $65 | $368 |
| 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. |
41 | $6 | $41 |
| 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. |
41 | $29 | $229 |
| Complete breast ultrasound, 1 breast A complete ultrasound examination of one breast to visualize internal structures. |
40 | $34 | $330 |
| Limited ultrasound of 1 breast A focused ultrasound examination of a single breast to evaluate specific areas of concern. |
39 | $22 | $159 |
| 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. |
38 | $50 | $344 |
| Foot X-ray, 3+ views An X-ray imaging test of the foot that captures at least three different views to evaluate the bones and joints. |
38 | $6 | $37 |
| 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. |
38 | $20 | $117 |
| Digital breast tomosynthesis (3D mammogram) A specialized imaging test that creates three-dimensional pictures of the breast tissue to help detect abnormalities. |
35 | $20 | $58 |
| 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. |
34 | $61 | $515 |
| Limited abdominal ultrasound A focused ultrasound examination of the abdomen to evaluate specific organs or areas. This procedure uses sound waves to create images of internal structures. |
33 | $21 | $150 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
32 | $32 | $282 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
32 | $29 | $172 |
| Diagnostic mammography of 1 breast An X-ray examination of one breast to evaluate specific breast symptoms or abnormalities. |
31 | $26 | $120 |
| Ankle X-ray, minimum 3 views An X-ray imaging test of the ankle that captures at least three different angles to evaluate the bones and joints. |
30 | $5 | $38 |
| 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. |
27 | $35 | $260 |
| Knee X-ray, 4 or more views An imaging test using X-rays to create multiple pictures of the knee joint from different angles. |
27 | $8 | $48 |
| Wrist X-ray, minimum 3 views An imaging test using X-rays to capture at least three different angles of the wrist bones and joints. |
25 | $6 | $35 |
| Abdominal X-ray, 2 views An X-ray imaging test of the abdomen using two different angles to visualize internal structures. |
24 | $9 | $54 |
| Ultrasound of arm and leg arteries This procedure uses sound waves to create images of the blood vessels in the arms and legs. It allows healthcare providers to examine the structure and blood flow within these arteries. |
24 | $9 | $42 |
| Ultrasound of abdomen and pelvis blood flow An ultrasound exam that uses sound waves to visualize and assess blood flow through the arteries and veins in the abdomen and pelvis. |
23 | $30 | $211 |
| Rib X-ray, minimum 3 views An X-ray imaging test of the ribs on one side of the body. The procedure includes a minimum of three different views to capture detailed images. |
21 | $10 | $60 |
| X-ray of hand, minimum of 3 views An X-ray imaging test of the hand that captures at least three different angles to visualize the bones and joints. |
21 | $6 | $38 |
| 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. |
20 | $6 | $44 |
| 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. |
20 | $25 | $146 |
| Abdominal X-ray, 1 view An X-ray image of the abdomen taken from a single angle to visualize internal structures. |
19 | $7 | $47 |
| 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. |
17 | $59 | $347 |
| 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. |
16 | $78 | $457 |
| X-ray of upper spine, 4-5 views An X-ray imaging test of the upper spine using 4 to 5 different views to visualize the bones and structures in that area. |
16 | $8 | $74 |
| 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. |
16 | $15 | $72 |
| CT scan of neck soft tissue with contrast A computed tomography scan that uses contrast dye to create detailed images of the soft tissues in the neck. |
15 | $54 | $316 |
| 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. |
15 | $39 | $268 |
| 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. |
15 | $52 | $380 |
| 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. |
15 | $7 | $57 |
| Knee X-ray, 3 views An X-ray imaging test of the knee joint that captures three different angles to evaluate the bones and surrounding structures. |
15 | $4 | $39 |
| Limited ultrasound of pelvis A focused ultrasound exam of the pelvic area to evaluate specific structures. This procedure provides images of the pelvis to assist in medical assessment. |
15 | $17 | $75 |
| 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. |
15 | $28 | $206 |
| 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. |
14 | $31 | $275 |
| X-ray of lower and sacral spine, minimum of 4 views An X-ray imaging test of the lower back and sacrum using at least four different angles to visualize the bones and joints. |
14 | $7 | $76 |
| 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 | $7 | $37 |
| MRI of leg joint, without contrast A magnetic resonance imaging scan of a joint in the leg performed without the use of contrast dye. |
14 | $49 | $284 |
| Transvaginal pelvic ultrasound An ultrasound exam using a probe inserted into the vagina to image the uterus, ovaries, fallopian tubes, cervix, and surrounding pelvic structures. |
14 | $23 | $149 |
| 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. |
13 | $8 | $49 |
| Elbow X-ray, minimum 3 views An X-ray imaging test of the elbow joint that captures at least three different angles to visualize the bones and surrounding structures. |
13 | $7 | $38 |
| 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. |
13 | $49 | $288 |
| CT scan of leg, without contrast A computed tomography scan of the leg performed without the use of contrast dye. This imaging test uses X-rays to create detailed cross-sectional images of the leg's internal structures. |
13 | $39 | $234 |
| Limited ultrasound of joint or extremity A focused ultrasound exam of a specific joint or other structure in the arm or leg, excluding blood vessels. |
13 | $27 | $99 |
| X-ray of middle spine, 3 views An X-ray imaging test that captures three different views of the middle section of the spine to evaluate its structure. |
12 | $8 | $48 |
| Limited retroperitoneal ultrasound A focused ultrasound exam of the area behind the abdominal cavity to evaluate specific structures. |
12 | $22 | $122 |
| 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. |
11 | $58 | $427 |
| 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. |
11 | $53 | $155 |
| Pelvis X-ray, 1-2 views An X-ray imaging test of the pelvic area using one to two different angles to visualize the bones and joints. |
11 | $6 | $46 |
| CT scan of abdominal and pelvic blood vessels with contrast A computed tomography scan that uses contrast dye to visualize the blood vessels in the abdomen and pelvis. |
11 | $85 | $556 |
| 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. |
11 | $64 | $530 |
| Double contrast esophagram An X-ray of the esophagus using two types of contrast material to create detailed images of the upper digestive tract. |
11 | $27 | $132 |
| Diagnostic mammography of both breasts | 11 | $35 | $150 |
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.
Industry Payment Transparency
Open Payments through 2023 ↗$106
Total received (2018-2023)
Avg $53/year across 2 years
Bottom 44% in CA for body imaging physician
2
Companies
2
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
$106 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2023
$87
2018
$20
Payments by company (2023)
Consulting
Speaking
Meals & Travel
Research
Cook Medical LLC
$87
Top 3 companies account for 100.0% of 2023 payments
All-time payments by company (2018-2023) ›
Cook Medical LLC
$87
Cardinal Health 414, LLC
$20
Top 3 companies account for 100.0% of all-time payments
Associated products mentioned in payments ›
COOK · Lymphoseek
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
Body imaging physicians within 10 mi
15
Per 100K population
7.8
County median income
$106,190
Nearest hospital
MARSHALL MEDICAL CENTER
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 2023 |
| 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. Guo is a mixed practice specialist, with moderate Medicare volume, 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. Guo experienced with chest x-ray, 1 view?
Based on Medicare claims data, Dr. Guo performed 385 chest x-ray, 1 view 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. Guo receive payments from pharmaceutical companies?
Yes. Dr. Guo received a total of $106 from 2 companies across 2 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. Guo's costs compare to other body imaging physicians in Placerville?
Dr. Guo's average Medicare payment per service is $28. 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. Guo) 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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