Medicare Enrolled
Dr. Amy Bui, M.D.
Endocrinology · Mission Viejo, 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. Bui 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 →
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What this data tells you about Dr. Bui
Dr. Amy Bui is an endocrinology specialist in Mission Viejo, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Bui performed 3,311 Medicare services across 864 unique beneficiaries.
Between the years covered by Open Payments, Dr. Bui received a total of $8,413 from 51 pharmaceutical and/or device companies across 423 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in endocrinology. 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. Bui 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 21% volume in CA
$8,413 industry payments
Medicare Practice Summary
Medicare Utilization ↗3,311
Medicare services
Top 21% in CA for endocrinology
864
Unique beneficiaries
$31
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~174 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 |
|---|---|---|---|
| Denosumab injection (Prolia/Xgeva) | 2,040 | $18 | $33 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
410 | $98 | $345 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
149 | $8 | $13 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
118 | $9 | $32 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
108 | $16 | $48 |
| 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. |
96 | $92 | $325 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
73 | $10 | $32 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
49 | $13 | $43 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
47 | $145 | $485 |
| 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. |
44 | $43 | $109 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
38 | $12 | $39 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
34 | $29 | $85 |
| Continuous glucose monitoring with interpretation This procedure involves monitoring blood sugar levels in tissue fluid using a sensor placed under the skin, along with the interpretation and reporting of the results. |
34 | $29 | $92 |
| Basic metabolic blood panel A blood test that measures a group of basic chemicals, including total calcium levels. |
25 | $8 | $24 |
| Urine microalbumin test (kidney screening) A laboratory test that measures the amount of microalbumin, a small protein, in a urine sample. This test is used to detect early signs of kidney damage. |
23 | $6 | $39 |
| Creatinine test (kidney function) A blood test that measures the amount of creatinine to assess kidney function or detect muscle injury. |
23 | $5 | $18 |
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 2024 ↗$8,413
Total received (2018-2024)
Avg $1,202/year across 7 years
Top 21% in CA for endocrinology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
51
Companies
423
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
$8,413 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,300
2023
$1,012
2022
$655
2021
$249
2020
$609
2019
$2,820
2018
$1,768
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Abbott Laboratories
$335
Lilly USA, LLC
$134
ABBVIE INC.
$116
SANOFI-AVENTIS U.S. LLC
$80
Novo Nordisk Inc
$74
RECORDATI_RARE_DISEASES_INC.
$67
Amgen Inc.
$65
Corcept Therapeutics
$61
Radius Health, Inc.
$60
Kyowa Kirin, Inc.
$53
Novartis Pharmaceuticals Corporation
$44
Tandem Diabetes Care, Inc.
$43
Alexion Pharmaceuticals, Inc.
$29
Verity Pharmaceuticals Inc.
$24
Medtronic, Inc.
$23
CeQur Corporation
$22
Xeris Pharmaceuticals, Inc.
$19
Mannkind Corporation
$18
Dexcom, Inc.
$17
Currax Pharmaceuticals LLC
$13
Top 3 companies account for 45.0% of 2024 payments
All-time payments by company (2018-2024) ›
Novo Nordisk Inc
$967
Amgen Inc.
$827
Lilly USA, LLC
$792
Abbott Laboratories
$788
SANOFI-AVENTIS U.S. LLC
$525
AbbVie, Inc.
$484
Insulet Corporation
$401
Dexcom, Inc.
$375
AstraZeneca Pharmaceuticals LP
$375
Janssen Pharmaceuticals, Inc
$353
Radius Health, Inc.
$248
Novartis Pharmaceuticals Corporation
$170
Corcept Therapeutics
$152
AbbVie Inc.
$127
Merck Sharp & Dohme Corporation
$120
Boehringer Ingelheim Pharmaceuticals, Inc.
$117
ABBVIE INC.
$116
Kowa Pharmaceuticals America, Inc.
$112
Horizon Therapeutics plc
$103
Alexion Pharmaceuticals, Inc.
$95
RECORDATI_RARE_DISEASES_INC.
$90
IBSA Pharma Inc.
$85
Kyowa Kirin, Inc.
$79
Regeneron Healthcare Solutions, Inc.
$73
Medtronic MiniMed, Inc.
$66
Tandem Diabetes Care, Inc.
$60
Amarin Pharma Inc.
$57
Currax Pharmaceuticals LLC
$54
CeQur Corporation
$52
Bayer HealthCare Pharmaceuticals Inc.
$42
Mannkind Corporation
$38
Xeris Pharmaceuticals, Inc.
$38
Nalpropion Pharmaceuticals LLC
$38
Ascendis Pharma Inc
$35
ASCEND Therapeutics US, LLC
$34
BOSTON SCIENTIFIC CORPORATION
$33
Shire North American Group Inc
$26
Ipsen Biopharmaceuticals, Inc
$24
Verity Pharmaceuticals Inc.
$24
LifeScan, Inc.
$23
GlaxoSmithKline, LLC.
$23
Medtronic, Inc.
$23
Zealand Pharma US, Inc.
$23
Supernus Pharmaceuticals, Inc.
$22
Bayer Healthcare Pharmaceuticals Inc.
$22
DEXCOM, INC.
$19
PFIZER INC.
$14
Strongbridge US INC.
$14
Alvogen Inc
$13
Orexigen Therapeutics, Inc.
$11
Gemini Laboratories, LLC
$11
Top 3 companies account for 30.7% of all-time payments
Associated products mentioned in payments ›
AFREZZA · ANORO · APIDRA · Androgel · BAQSIMI · BASAGLAR · BINOSTO · CONTRAVE · CeQur Simplicity · DEXCOM CGM · DEXCOM G6 CGM SYSTEM · DEXCOM G6 TRANSMITTER · Dexcom G6 Transmitter · EVENITY · FARXIGA · FORTEO · FREESTYLE LIBRE · FREESTYLE LIBRE 3 · FreeStyle Libre · FreeStyle Libre blood glucose Flash Monitoring System · GVOKE HYPOPEN · GVOKE PFS · HUMALOG · HUMULIN · INVOKANA · ISTURISA · JANUVIA · JARDIANCE · Kerendia · Korlym · LEQVIO · Livalo · MACRILEN · MINIMED 780G · MOUNJARO · Minimed 670G System · NATPARA · NATPARA (PARATHYROID HORMONE) · OT Verio Flex Starter Kit · Omnipod · Ozempic · PRALUENT · PRALUENT ALIROCUMAB INJECTION · Prolia · RYBELSUS · Repatha · SIGNIFOR LAR · SKYTROFA · SOLIQUA · SOLIQUA 100/33 · SOMATULINE DEPOT · SOMAVERT · SPECTRA WAVEWRITER · STRENSIQ · SYNTHROID · Saxenda · Strensiq · Synthroid · TEPEZZA · TERIPARATIDE · TLANDO · TOUJEO · TRADJENTA · TRULICITY · TZIELD · Tirosint · Tlando · Tymlos · UBRELVY · UNITHROID · Vascepa · Victoza · WATCHMAN · Wegovy · XARELTO · ZEGALOGUE · t-slim insulin pump · t:slim X2 Insulin Pump with Control-IQ
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
Endocrinologists within 10 mi
91
Per 100K population
2.9
County median income
$113,702
Nearest hospital
PROVIDENCE MISSION 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. Bui is a mixed practice specialist, with above-average Medicare volume (top 21% 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. Bui experienced with denosumab injection (prolia/xgeva)?
Based on Medicare claims data, Dr. Bui performed 2,040 denosumab injection (prolia/xgeva) 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. Bui receive payments from pharmaceutical companies?
Yes. Dr. Bui received a total of $8,413 from 51 companies across 423 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. Bui's costs compare to other endocrinologists in Mission Viejo?
Dr. Bui's average Medicare payment per service is $31. 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. Bui) 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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