Physician Profile
Stefan Sien, D.O.
Unclaimed ProfileAbout Dr. Sien
Based in Murrieta, CA, Stefan Sien, D.O. is listed in the NPI registry under pulmonary disease. Stefan is also listed as specializing in critical care medicine. According to Medicare claims data, Stefan cared for 927 Medicare patients across 1,424 services. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes, and initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (951) 566-5646
- Email not available
Practice Locations
28078 BAXTER RD STE 324
Murrieta, CA 92563
Conditions Commonly Evaluated or Treated
Within Pulmonary Disease generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Asthma
- Chronic cough
- COPD
- Lung cancer
- Pulmonary fibrosis
- Shortness of breath
- Sleep apnea
Airway disorders
- Acute bronchitis
- Bronchiectasis
- Chronic Throat Clearing and Chronic Cough
Blood vessel disorders
- Blood Clot in Lung
- Pulmonary hypertension
Critical care
- Respiratory failure
Diagnostic findings
- Swollen Chest Lymph Nodes
Environmental lung diseases
- Chronic Beryllium Disease
Genetic conditions
- Alpha-1 antitrypsin deficiency
- Cystic fibrosis in adults
Infections
- Community-acquired pneumonia
- Fungal lung infection
- Legionnaires' Disease
- Lung abscess
- NTM lung infection
- Severe Pneumonia
- Tuberculosis
- Valley fever
- Walking Pneumonia in Children
- Whooping Cough
Inflammatory conditions
- Farmer's lung
- Interstitial lung disease
- Sarcoidosis
Lung growths
- Mesothelioma
- Suspicious Lung Spot
Occupational & environmental
- Asbestos lung damage
- Black lung disease
- Silicosis
- Vaping lung illness
Pleural disorders
- Collapsed lung
- Fluid around the lungs
- Pain when breathing
Post-infection conditions
- Long COVID lung problems
Sleep disorders
- Excessive daytime sleepiness
- Shallow Breathing In Sleep
- Snoring
- Upper Airway Resistance Syndrome
- Waking Up Gasping Or Choking
Structural lung conditions
- Lung Bullae
Symptoms
- Blue Baby Syndrome
- Chest congestion
- Coughing up blood
- Low oxygen levels
- Rapid Breathing
- Severe asthma attack
- Wheezing
Procedures & services
Most searched procedures
- Bronchoscopy
- Oxygen therapy management
- Pulmonary function test
- Spirometry
Airway care
- Trach Tube Care and Changing
Airway management
- Tracheostomy care
Biopsies
- Lung Cryobiopsy
Biopsies & diagnostics
- EBUS lung biopsy
- Needle biopsy of lung
- Robotic lung biopsy
Breathing tests
- 6-minute walk test
- Asthma challenge test
- Cardiopulmonary Exercise Testing (CPET)
- Exhaled nitric oxide test
Cancer diagnostic procedures
- Endobronchial Ultrasound Staging
Consultations
- Pre-op lung clearance
Counseling & prevention
- Inhaler technique instruction
- Smoking cessation counseling
Critical care
- Ventilator Weaning Evaluation
Diagnostic procedures
- Lung Wash Procedure
Drainage care
- Pleural Catheter Removal
Imaging
- Chest CT Scan
- Chest X-Ray
- Lung Perfusion Scan
Interventional procedures
- Bronchial thermoplasty
- Lung valve placement for emphysema
Lab tests
- Arterial blood gas test
- Sputum test
Lung tests
- Pre- And Post-Bronchodilator Test
Medications
- Severe Asthma Biologics
Monitoring
- Asthma Action Plan Consultation
- Continuous Pulse Oximetry
Pleural procedures
- Chest tube insertion
- Draining lung fluid
- Medical thoracoscopy
- Permanent chest drain insertion
- Pleural sealing procedure
Procedures
- Foreign Object Removal From Airway
- Windpipe stent placement
Rehabilitation
- Airway clearance therapy
- Pulmonary rehabilitation
Screening
- Low-dose CT lung cancer screening
Sleep equipment
- CPAP Mask Fitting
Sleep medicine
- At-home sleep test
- BiPAP therapy
- CPAP titration
- Overnight oxygen study
- Sleep study
Sleep treatments
- Sleep Apnea Dental Device Evaluation
Specialist evaluations
- Lung Transplant Evaluation
- Lung Volume Reduction Evaluation
Specialized testing
- High-Altitude Oxygen Test
Treatments
- Breathing Treatment
Procedures Most Often Billed to Medicare
1,424 services · 927 patients · 15 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Irrigation and suction of lung airways to obtain cells using an endoscope | Procedure | 31624 |
45 | More often than most peers in Pulmonary Disease |
| Aspiration of initial secretion of lung airway using an endoscope | Procedure | 31645 |
44 | More often than most peers in Pulmonary Disease |
| Aspiration of fluid from chest cavity using imaging guidance | Procedure | 32555 |
16 | Less often than most peers in Pulmonary Disease |
| Needle biopsy of windpipe cartilage, airway, and/or lung using an endoscope | Procedure | 31629 |
16 | Less often than most peers in Pulmonary Disease |
| Biopsy of lobe of lung using an endoscope, 1 lobe | Procedure | 31628 |
16 | Less often than most peers in Pulmonary Disease |
| Biopsy of lung airway using an endoscope | Procedure | 31625 |
12 | Less often than most peers in Pulmonary Disease |
| Test to determine lung volumes using sensors | Treatment | 94726 |
64 | As often as other peers in Pulmonary Disease |
| Test to examine how well the lungs exchange gases | Treatment | 94729 |
63 | As often as other peers in Pulmonary Disease |
| Evaluation of use of breathing device | Treatment | 94664 |
63 | More often than most peers in Pulmonary Disease |
| Test to measure expiratory airflow and volume changes before and after medication administration | Treatment | 94060 |
63 | As often as other peers in Pulmonary Disease |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other lung specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2005 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Irrigation and suction of lung airways to obtain cells using an endoscope 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Stefan Sien's specialty?
Stefan Sien is a lung specialist in Murrieta, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Pulmonary Disease”.
NPI registry
Where can I find Stefan Sien?
Stefan Sien is listed at 28078 Baxter Rd Ste 324, Murrieta, CA 92563. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Stefan Sien?
The number on file is (951) 566-5646. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Stefan Sien's NPI number?
Stefan Sien's National Provider Identifier is 1932319464. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Stefan Sien's education?
Stefan Sien attended Other, graduating in 2005. This comes from the CMS National Downloadable File.
CMS public data
How long has Stefan Sien been practicing?
Stefan Sien has 21 years experience. Calculated from a graduation year of 2005, reported in the CMS National Downloadable File.
CMS public data
What is Stefan Sien known for?
According to Medicare billing data, Stefan Sien performs procedures including irrigation and suction of lung airways to obtain cells using an endoscope, aspiration of initial secretion of lung airway using an endoscope and aspiration of fluid from chest cavity using imaging guidance; provides treatments such as test to determine lung volumes using sensors and test to examine how well the lungs exchange gases, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Stefan Sien confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Stefan Sien. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.