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Edit this profileAt a glance
- 2141 N Harbor Blvd, Suite 25000, Fullerton, CA 92835
About Dr. Weissig
Based in Fullerton, CA, Mark D. Weissig, M.D. is listed in the NPI registry under pulmonary disease. Mark graduated from Duke University School of Medicine in 1980. Mark is also listed as specializing in internal medicine. According to Medicare claims data, Mark cared for 1,054 Medicare patients across 1,555 services. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and test to measure expiratory airflow and volume changes before and after medication administration. NPI 1649266032 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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
- (714) 626-8610
- Email not available
Practice Locations
2141 N HARBOR BLVD SUITE 25000
Fullerton, CA 92835
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
Chronic conditions
Most searched conditions
Airway disorders
Blood vessel disorders
Critical care
Diagnostic findings
Environmental lung diseases
Genetic conditions
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
Lung growths
Occupational & environmental
Pleural disorders
Post-infection conditions
Sleep disorders
- Excessive daytime sleepiness
- Shallow Breathing In Sleep
- Snoring
- Upper Airway Resistance Syndrome
- Waking Up Gasping Or Choking
Structural lung conditions
Symptoms
- Blue Baby Syndrome
- Chest congestion
- Coughing up blood
- Low oxygen levels
- Rapid Breathing
- Severe asthma attack
- Wheezing
Procedures & services
Biopsies
Breathing
- CPAP Setup and Mask Troubleshooting
- Home Oxygen Therapy Training
- Nebulizer Breathing Treatment Training
Pleural procedures
- Draining lung fluid
- Chest tube insertion
- Medical thoracoscopy
- Permanent chest drain insertion
- Pleural sealing procedure
Sleep medicine
- At-home sleep test
- BiPAP therapy
- CPAP titration
- Overnight oxygen study
- Sleep study
Treatments
Most searched procedures
Airway care
Airway management
Biopsies & diagnostics
Breathing tests
- 6-minute walk test
- Asthma challenge test
- Cardiopulmonary Exercise Testing (CPET)
- Exhaled nitric oxide test
Cancer diagnostic procedures
Consultations
Counseling & prevention
Critical care
Diagnostic procedures
Drainage care
Imaging
Interventional procedures
Lab tests
Lung tests
Medications
Monitoring
Procedures
Rehabilitation
Screening
Sleep equipment
Sleep treatments
Specialist evaluations
Specialized testing
Procedures Most Often Billed to Medicare
1,555 services · 1,054 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Test to measure expiratory airflow and volume changes before and after medication administration | Treatment | 94060 |
136 | More often than most peers in Pulmonary Disease |
| Test to examine how well the lungs exchange gases | Treatment | 94729 |
102 | More often than most peers in Pulmonary Disease |
| Test to determine lung volumes using sensors | Treatment | 94726 |
101 | More often than most peers in Pulmonary Disease |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
775 | More than most peers in Pulmonary Disease |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
352 | More often than most peers in Pulmonary Disease |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
89 | More than most 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 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 30 related providers in 4 groups
Other lung specialists in Fullerton 6
Same specialty, same city.
Trained at Duke University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1980 at Duke University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Test to measure expiratory airflow and volume changes before and after medication administration 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Mark D. Weissig's specialty?
Mark D. Weissig is a lung specialist in Fullerton, 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 Mark D. Weissig?
Mark D. Weissig is listed at 2141 N Harbor Blvd Suite 25000, Fullerton, CA 92835. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Mark D. Weissig?
The number on file is (714) 626-8610. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Mark D. Weissig's NPI number?
Mark D. Weissig's National Provider Identifier is 1649266032. 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 Mark D. Weissig's education?
Mark D. Weissig attended Duke University School of Medicine, graduating in 1980. This comes from the CMS National Downloadable File.
CMS public data
How long has Mark D. Weissig been practicing?
Mark D. Weissig has 46 years experience. Calculated from a graduation year of 1980, reported in the CMS National Downloadable File.
CMS public data
What is Mark D. Weissig known for?
According to Medicare billing data, Mark D. Weissig provides treatments such as test to measure expiratory airflow and volume changes before and after medication administration 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 Mark D. Weissig confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Mark D. Weissig. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.