Dr. Ryan C. Chua, M.D.
Pulmonology (Pulmonary Disease Physician)
100 Hospital Rd, Suite 2a
Leominster, MA 01453
Who else practices at this address →
Worcester County includes primary care (3% of residents) and mental health (11% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Years since graduation
- 23
- In the NPI registry since
- 2008
- Medicare patients seen, 2024
- 1,111
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2008Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Pulmonary Disease Physician primary
MA license 307929 -
Critical Care Medicine (Internal Medicine) Physician
MA license 254196 -
Internal Medicine Physician
MA license 237513
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Umass Memorial Medical Center/university Campus Worcester, MA
- Umass Memorial Healthalliance Hospitals Leominster, MA
- Umass Memorial Health - Harrington Hospital Southbridge, MA
- Emerson Hospital - W Concord, MA
- Marlborough Hospital Marlborough, MA
Medical groups
- Mass Lung and Allergy PC (10 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 1,111
- Services billed
- 2,604
- Patients’ average age
- 72
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes | 748 | 591 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 700 | 203 |
| Critical care, first 30-74 minutes | 273 | 95 |
| Established patient office or other outpatient visit, 40-54 minutes | 171 | 154 |
| Critical care, each additional 30 minutes | 166 | 62 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 119 | 110 |
| New patient office or other outpatient visit, 60-74 minutes | 63 | 63 |
| Test to examine how well the lungs exchange gases | 42 | 42 |
| Test to determine lung volumes using sensors | 40 | 40 |
| Test to measure expiratory airflow and volume changes before and after medication administration | 35 | 35 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Albuterol Sulfate Hfa (albuterol sulfate) Other prescribers in Leominster, MA | 323 |
| Trelegy Ellipta (fluticasone/umeclidin/vilanter) Other prescribers in Leominster, MA | 188 |
| Montelukast Sodium Other prescribers in Leominster, MA | 150 |
| Prednisone Other prescribers in Leominster, MA | 108 |
| Breo Ellipta (fluticasone/vilanterol) Other prescribers in Leominster, MA | 94 |
| Breztri Aerosphere (budesonide/glycopyr/formoterol) Other prescribers in Leominster, MA | 92 |
| Symbicort (budesonide/formoterol fumarate) Other prescribers in Leominster, MA | 74 |
| Azithromycin Other prescribers in Leominster, MA | 73 |
| Budesonide-Formoterol Fumarate (budesonide/formoterol fumarate) Other prescribers in Leominster, MA | 58 |
| Ventolin Hfa (albuterol sulfate) Other prescribers in Leominster, MA | 50 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 21 companies reported 135 payments worth $2,831 in total to this clinician.
| AstraZeneca Pharmaceuticals LP | $603 |
|---|---|
| GlaxoSmithKline, LLC. | $592 |
| Regeneron Healthcare Solutions, Inc. | $206 |
| Genzyme Corporation | $191 |
| Actelion Pharmaceuticals US, Inc. | $190 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $146 |
| Electromed, Inc. | $124 |
| Takeda Pharmaceuticals U.S.A., Inc. | $93.11 |
| Food and Beverage | $2,741 |
|---|---|
| Education | $89.99 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Sanofi-aventis U.S. LLC Jul 7, 2025 | Education DUPIXENT · Immunology · in-kind | $89.99 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.