Medicare Enrolled
Dr. Thomas Diamant, MD
Pulmonary Disease · Costa Mesa, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
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. Diamant 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. Diamant
Dr. Thomas Diamant is a pulmonary disease specialist in Costa Mesa, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Diamant performed 2,679 Medicare services across 1,549 unique beneficiaries.
Between the years covered by Open Payments, Dr. Diamant received a total of $13,636 from 45 pharmaceutical and/or device companies across 549 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in pulmonary disease. 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. Diamant 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 14% volume in CA
$13,636 industry payments
Medicare Practice Summary
Medicare Utilization ↗2,679
Medicare services
Top 14% in CA for pulmonary disease
1,549
Unique beneficiaries
$58
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~141 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 |
|---|---|---|---|
| Airflow rate measurement test A test that measures the rate of airflow. This procedure assesses how quickly air moves. |
606 | $32 | $95 |
| 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. |
599 | $100 | $170 |
| Betamethasone steroid injection An injection containing a combination of betamethasone acetate and betamethasone sodium phosphate. |
329 | $5 | $12 |
| 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. |
186 | $152 | $237 |
| Pulmonary gas exchange test A test to examine how well the lungs exchange gases. |
124 | $52 | $103 |
| Inhalation treatment for airway obstruction or sputum production A treatment involving the inhalation of medication to help clear airway obstructions or reduce sputum production. |
122 | $8 | $60 |
| Lung volume test using sensors A test that measures the amount of air in the lungs using sensors. |
119 | $49 | $100 |
| Nitric oxide gas level test A test that measures the level of nitric oxide gas in the body. |
117 | $17 | $40 |
| 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. |
99 | $12 | $31 |
| Spirometry test before and after medication A test that measures the amount of air you can exhale and the speed of your breathing before and after taking a medication. |
94 | $34 | $124 |
| New patient office visit, complex (60-74 min) | 83 | $181 | $399 |
| Telephone medical discussion, 21-30 minutes A telephone conversation with a physician lasting between 21 and 30 minutes. This code covers the time spent discussing medical matters over the phone. |
55 | $102 | $187 |
| Breathing device use evaluation An assessment of how a patient uses a breathing device. The provider reviews the patient's technique and device handling. |
34 | $16 | $24 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
32 | $66 | $99 |
| Expiratory airflow and volume test A test that measures the amount of air you can exhale and the speed at which you can breathe it out. It evaluates lung function by assessing expiratory airflow and volume. |
25 | $23 | $91 |
| Spirometry test A test that measures the amount of air you can exhale and how fast you can blow it out. The provider evaluates the results to check lung function. |
16 | $20 | $50 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
16 | $78 | $126 |
| Sedation by physician, initial 15 minutes Administration of a drug to induce depression of consciousness by the physician performing a procedure. This code covers the initial 15 minutes of sedation for patients aged 5 years or older. |
12 | $10 | $78 |
| Exercise-induced lung stress test A test performed to evaluate how the lungs function during physical exertion. It helps identify breathing difficulties or lung conditions that occur specifically when exercising. |
11 | $27 | $77 |
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 ↗$13,636
Total received (2018-2024)
Avg $1,948/year across 7 years
Top 13% in CA for pulmonary disease
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
45
Companies
549
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
$13,500 (99.0%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$136 (1.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$3,012
2023
$2,256
2022
$2,115
2021
$1,684
2020
$1,176
2019
$1,950
2018
$1,443
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
GlaxoSmithKline, LLC.
$430
Regeneron Healthcare Solutions, Inc.
$421
Mylan Specialty L.P.
$417
AstraZeneca Pharmaceuticals LP
$240
Boehringer Ingelheim Pharmaceuticals, Inc.
$202
Amgen Inc.
$191
ABBVIE INC.
$166
Vifor Pharma, Inc.
$157
Baxter Healthcare
$95
Takeda Pharmaceuticals U.S.A., Inc.
$94
GENZYME CORPORATION
$88
Janssen Pharmaceuticals, Inc
$87
ViiV Healthcare Company
$71
Electromed, Inc.
$50
Actelion Pharmaceuticals US, Inc.
$47
Paratek Pharmaceuticals, Inc.
$47
Grifols USA, LLC
$36
ANI Pharmaceuticals, Inc.
$29
United Therapeutics Corporation
$25
Seqirus USA Inc
$25
Gilead Sciences, Inc.
$23
Pulmonx Corporation
$20
Inari Medical, Inc.
$19
Merck Sharp & Dohme LLC
$18
ZOLL Respicardia, Inc.
$15
Top 3 companies account for 42.1% of 2024 payments
All-time payments by company (2018-2024) ›
Boehringer Ingelheim Pharmaceuticals, Inc.
$2,501
AstraZeneca Pharmaceuticals LP
$1,944
GlaxoSmithKline, LLC.
$1,913
Mylan Specialty L.P.
$1,180
Regeneron Healthcare Solutions, Inc.
$904
Grifols USA, LLC
$656
Takeda Pharmaceuticals U.S.A., Inc.
$655
Amgen Inc.
$427
Philips Electronics North America Corporation
$346
Sunovion Pharmaceuticals Inc.
$270
Genentech USA, Inc.
$222
Baxter Healthcare
$216
Janssen Pharmaceuticals, Inc
$183
ABBVIE INC.
$166
GENZYME CORPORATION
$164
Insmed, Inc.
$157
Vifor Pharma, Inc.
$157
ViiV Healthcare Company
$145
United Therapeutics Corporation
$127
Electromed, Inc.
$122
Teva Pharmaceuticals USA, Inc.
$114
Advanced Respiratory, Inc
$112
PFIZER INC.
$112
Actelion Pharmaceuticals US, Inc.
$101
Paratek Pharmaceuticals, Inc.
$92
Covis Pharma GmBH
$66
Merck Sharp & Dohme Corporation
$56
Pulmonx Corporation
$50
Octapharma USA, Inc.
$49
Allergan Inc.
$47
Circassia Pharmaceuticals Inc
$42
E.R. Squibb & Sons, L.L.C.
$37
CSL Behring
$35
Merck Sharp & Dohme LLC
$33
Harmony Biosciences LLC
$29
ANI Pharmaceuticals, Inc.
$29
Seqirus USA Inc
$25
Gilead Sciences, Inc.
$23
SANOFI PASTEUR INC.
$22
Endogastric Solutions, Inc
$20
Shionogi Inc
$20
Inari Medical, Inc.
$19
Shire North American Group Inc
$18
ZOLL Respicardia, Inc.
$15
Sanofi Pasteur Inc.
$14
Top 3 companies account for 46.6% of all-time payments
Associated products mentioned in payments ›
(8874) inCourage · AIRSUPRA · ALVESCO · ANORO · ASMANEX · AVYCAZ · AirDuo Digihaler · Arikayce · BEVESPI AEROSPHERE · BREO · BREO ELLIPTA · BREZTRI · BREZTRI AEROSPHERE · BROVANA · CAPVAXIVE · CHARTIS CATHETER · CUTAQUIG · CUVITRU · DOVATO · DUPIXENT · Dymista · ELIQUIS · ESOPHYX · Esbriet · FARXIGA · FASENRA · FLOWTRIEVER CATHETER · FLUZONE HIGH-DOSE · FLUZONE QUADRIVALENT NORTHERN HEMISPHERE · Fetroja · Fluad · GLASSIA · HYQVIA · Hillrom - Life 2000 Ventilation System · Hillrom - Vest System Model 105 Home Care · Hillrom - Volara System · Hizentra · LONHALA MAGNAIR · Life 2000 Ventilation System · NUCALA · NUZYRA · OFEV · OPSUMIT · OPSUMIT MACITENTAN · PREVNAR 13 · PREVNAR 20 · PROAIR · PURIFIED CORTROPHIN GEL · ProAir Digihaler · Prolastin-C Liquid · Pulmonx Endobronchial Valve EBV · QVAR · Respiratoriy Care Undiv · S · S&RC Und · SMARTVEST · SPIRIVA · SPIRIVA RESPIMAT · STIOLTO RESPIMAT · SYMBICORT · TEFLARO · TEZSPIRE · TRELEGY ELLIPTA · TUDORZA PRESSAIR · TYVASO · The MetaNeb System · The Vest System Model 105 Home Care · The VitalCough System · Trilogy 100 · UPTRAVI · Utibron · Wakix · XARELTO · Xembify · Xolair · YUPELRI · Yupelri · Zemaira · inCourage · remede System
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 (99%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Pulmonary diseases within 10 mi
128
Per 100K population
4.0
County median income
$113,702
Nearest hospital
COLLEGE HOSPITAL COSTA MESA
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. Diamant is a clinical cardiology specialist, with above-average Medicare volume (top 14% in CA), with low-engagement industry engagement in the top 13% of CA peers, 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. Diamant experienced with airflow rate measurement test?
Based on Medicare claims data, Dr. Diamant performed 606 airflow rate measurement test 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. Diamant receive payments from pharmaceutical companies?
Yes. Dr. Diamant received a total of $13,636 from 45 companies across 549 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. Diamant's costs compare to other pulmonary diseases in Costa Mesa?
Dr. Diamant's average Medicare payment per service is $58. 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. Diamant) 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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