Medicare Enrolled
Dr. Ming-Tyh Maa, M.D.
Critical Care Medicine · Walnut Creek, 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. Maa 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. Maa
Dr. Ming-Tyh Maa is a critical care medicine specialist in Walnut Creek, CA, with 18 years of NPI registration. Based on federal Medicare data, Dr. Maa performed 2,777 Medicare services across 1,804 unique beneficiaries.
Between the years covered by Open Payments, Dr. Maa received a total of $17,725 from 39 pharmaceutical and/or device companies across 189 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in critical care 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. Maa 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.
✓ 18 years in practice
▲ Top 10% volume in CA
$17,725 industry payments
Medicare Practice Summary
Medicare Utilization ↗2,777
Medicare services
Top 10% in CA for critical care medicine
1,804
Unique beneficiaries
$105
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~154 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 |
|---|---|---|---|
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
684 | $103 | $130 |
| Critical care, first 30-74 min Emergency medical care for a critically ill or injured patient lasting between 30 and 74 minutes. This service involves direct patient care and medical decision making to stabilize the patient. |
544 | $186 | $263 |
| 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. |
289 | $96 | $140 |
| Additional 30 minutes of critical care This code represents an additional 30 minutes of critical care services provided beyond the initial critical care time period. |
116 | $95 | $135 |
| 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. |
106 | $54 | $70 |
| Lung volume test using sensors A test that measures the amount of air in the lungs using sensors. |
89 | $54 | $124 |
| Pulmonary gas exchange test A test to examine how well the lungs exchange gases. |
89 | $58 | $124 |
| 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. |
88 | $32 | $124 |
| 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. |
87 | $38 | $125 |
| Bronchial irrigation and suction for cell collection This procedure uses an endoscope to flush and suction the lung airways in order to collect cells for testing. |
76 | $96 | $329 |
| 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. |
69 | $11 | $50 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
68 | $151 | $235 |
| Thoracentesis, removal of fluid from between lung and chest cavity This procedure involves removing fluid that has accumulated in the space between the lung and the chest wall. |
67 | $134 | $193 |
| 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. |
55 | $54 | $100 |
| Insertion of non-tunneled central venous catheter A procedure to place a central venous catheter for infusion in patients aged 5 years or older. The catheter is inserted directly into a large vein without being tunneled under the skin. |
45 | $73 | $140 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
41 | $143 | $245 |
| 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. |
39 | $72 | $95 |
| Arterial line insertion A tube is inserted into an artery through the skin to allow for blood sampling or infusion. |
34 | $38 | $60 |
| Emergent tracheostomy An emergency procedure to create an opening in the windpipe to insert a breathing tube, guided by an endoscope. |
29 | $118 | $165 |
| 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. |
24 | $142 | $190 |
| Computer-assisted navigation of lung airways This procedure uses computer technology to guide an endoscope through the airways of the lungs for precise navigation. |
17 | $84 | $210 |
| Lung biopsy via endoscope, 1 lobe A procedure to remove a small sample of lung tissue from one lobe using an endoscope for examination. |
17 | $65 | $210 |
| Ultrasound scan of chest An imaging test that uses sound waves to create pictures of the structures inside the chest. |
17 | $54 | $100 |
| Endoscopic needle biopsy of windpipe, airway, or lung A procedure where a needle is inserted through an endoscope to collect tissue samples from the windpipe, airway, or lung. |
16 | $144 | $292 |
| Follow-up heart ultrasound An ultrasound of the heart performed to monitor or reassess a previously identified condition or treatment progress. |
15 | $21 | $159 |
| Same-day hospital admission and discharge, low complexity Initial hospital care for a patient admitted and discharged on the same day, involving straightforward or low-level medical decision making. The visit requires at least 45 minutes of time if time is used to determine the level of service. |
15 | $86 | $155 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
15 | $34 | $50 |
| Vein-to-vein shunt insertion for hemodialysis A surgical procedure to create a connection between two veins. This shunt allows blood to flow directly from one vein to another to support hemodialysis treatment. |
13 | $86 | $249 |
| 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. |
13 | $6 | $19 |
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.
4.0% high complexity
6.0% medium
90.0% routine
Industry Payment Transparency
Open Payments through 2024 ↗$17,725
Total received (2018-2024)
Avg $2,532/year across 7 years
Top 8% in CA for critical care medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
39
Companies
189
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
$12,766 (72.0%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$4,960 (28.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$9,129
2023
$3,532
2022
$3,829
2021
$183
2020
$288
2019
$316
2018
$448
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
INTUITIVE SURGICAL, INC.
$4,863
Medical Device Business Services, Inc.
$1,594
Inspire Medical Systems, Inc.
$857
Olympus Corporation of the Americas
$648
Pulmonx Corporation
$373
AstraZeneca Pharmaceuticals LP
$154
Siemens Medical Solutions USA, Inc.
$143
ATRICURE, INC.
$131
ERBE USA Inc
$118
Ethicon Inc.
$98
Boehringer Ingelheim Pharmaceuticals, Inc.
$49
United Therapeutics Corporation
$26
GlaxoSmithKline, LLC.
$26
Insmed, Inc.
$26
Mallinckrodt Hospital Products Inc.
$24
Top 3 companies account for 80.1% of 2024 payments
All-time payments by company (2018-2024) ›
INTUITIVE SURGICAL, INC.
$4,863
Pulmonx Corporation
$2,203
Olympus Corporation of the Americas
$2,092
Medical Device Business Services, Inc.
$1,647
Intuitive Surgical, Inc.
$1,371
Ethicon Inc.
$986
Inspire Medical Systems, Inc.
$857
AstraZeneca Pharmaceuticals LP
$856
Body Vision Medical Inc.
$297
GlaxoSmithKline, LLC.
$294
Boehringer Ingelheim Pharmaceuticals, Inc.
$286
Inari Medical, Inc.
$185
ERBE USA Inc
$156
Siemens Medical Solutions USA, Inc.
$143
PFIZER INC.
$139
GENZYME CORPORATION
$134
ATRICURE, INC.
$131
Merck Sharp & Dohme Corporation
$127
Galvanize Therapeutics, Inc
$104
Olympus America Inc.
$99
Gilead Sciences, Inc.
$97
SANOFI-AVENTIS U.S. LLC
$96
Actelion Pharmaceuticals US, Inc.
$73
Takeda Pharmaceuticals U.S.A., Inc.
$59
Mylan Specialty L.P.
$56
Genentech USA, Inc.
$48
Merck Sharp & Dohme LLC
$46
Teva Pharmaceuticals USA, Inc.
$40
Bayer HealthCare Pharmaceuticals Inc.
$39
United Therapeutics Corporation
$26
Insmed, Inc.
$26
Mallinckrodt Hospital Products Inc.
$24
Bayer Healthcare Pharmaceuticals Inc.
$21
E.R. Squibb & Sons, L.L.C.
$20
Paratek Pharmaceuticals, Inc.
$20
Grifols USA, LLC
$19
Circassia Pharmaceuticals Inc
$19
bioMerieux
$17
Allergan Inc.
$11
Top 3 companies account for 51.7% of all-time payments
Associated products mentioned in payments ›
AIRSUPRA · ALIYA SYSTEM · ANORO ELLIPTA · ATRICURE CRYOICE CRYOSPHERE CRYOABLATION SYSTEM · AVYCAZ · AXERT · Adempas · AirDuo Digihaler · Arikayce · BREO · BREZTRI · CHANTIX · CHARTIS CATHETER · CINQAIR · CRYO2 · Cios Spin · DUAKLIR PRESSAIR · DUPIXENT · Da Vinci Surgical System · ELIQUIS · Erbe CYO2 · Esbriet · FASENRA · FLOWTRIEVER CATHETER · GLASSIA · HYQVIA · INSPIRE · Monarch · Monarch Platform · N/A · NUCALA · NUZYRA · OFEV · OPSUMIT · Perforomist · Prolastin-C Liquid · S · SINGLE USE SUCTION VALVE (Sterile) · SPIRIVA RESPIMAT · STIOLTO RESPIMAT · SYMBICORT · Spiration Valve System · TERLIVAZ · TEZSPIRE · TRELEGY ELLIPTA · TYVASO · UPTRAVI · VIDAS BRAHMS PCT · Yupelri · ZEPHYR ENDOBRONCHIAL VALVE · ZERBAXA
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 (72%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 8% for critical care medicine in CA.
Geographic Context
Critical care medicines within 10 mi
96
Per 100K population
8.3
County median income
$125,727
Nearest hospital
JOHN MUIR MEDICAL CENTER - WALNUT CREEK CAMPUS
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. Maa is a mixed practice specialist, with above-average Medicare volume (top 10% in CA), with low-engagement industry engagement in the top 8% of CA peers, with 18 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. Maa experienced with hospital follow-up visit, high complexity?
Based on Medicare claims data, Dr. Maa performed 684 hospital follow-up visit, high complexity 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. Maa receive payments from pharmaceutical companies?
Yes. Dr. Maa received a total of $17,725 from 39 companies across 189 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. Maa's costs compare to other critical care medicines in Walnut Creek?
Dr. Maa's average Medicare payment per service is $105. 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. Maa) 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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