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Edit this profileWhere to find Gerard J. Diefes, M.D.
- Wynnewood location main office
1001 City Line Ave, Wb 113, Wynnewood, PA 19096 - Exton location
736 W Lincoln Hwy, Exton, PA 19341
About Dr. Diefes
Based in Wynnewood, PA, Gerard J. Diefes, M.D. is listed in the NPI registry under pulmonary disease. Gerard graduated from Hahnemann University College of Medicine in 1992. Gerard is also listed as specializing in critical care medicine and sleep medicine. Medicare claims data shows Gerard provided 1,631 services to 657 patients. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, critical care, first 30-74 minutes, and subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes. NPI 1417948951 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
- (610) 896-0280
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
1001 CITY LINE AVE WB 113
Wynnewood, PA 19096
736 W Lincoln Hwy
Exton, PA 19341
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
1,631 services · 657 patients · 11 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Test to examine how well the lungs exchange gases | Treatment | 94729 |
30 | Less often than most peers in Pulmonary Disease |
| Test to determine lung volumes using gas dilution or washout | Treatment | 94727 |
30 | As often as other peers in Pulmonary Disease |
| Test to measure expiratory airflow and volume | Treatment | 94010 |
27 | Less often than most peers in Pulmonary Disease |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
822 | More than most peers in Pulmonary Disease |
| Critical care, first 30-74 minutes | Office visit | 99291 |
212 | More often than most peers in Pulmonary Disease |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
175 | More often 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 |
142 | As often as other peers in Pulmonary Disease |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
68 | More often than most peers in Pulmonary Disease |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
63 | More often than most peers in Pulmonary Disease |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
48 | More often 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.
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.
Other lung specialists in Wynnewood 6
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Hahnemann University College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1992 at Hahnemann University College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Test to examine how well the lungs exchange gases 8
Providers in PA who bill this service to Medicare most often.
Common questions
What does Gerard J. Diefes specialize in?
Gerard J. Diefes is a lung specialist in Wynnewood, PA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Pulmonary Disease”.
NPI registry
Where is Gerard J. Diefes located?
Gerard J. Diefes is listed at 1001 City Line Ave Wb 113, Wynnewood, PA 19096. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Gerard J. Diefes's phone number?
The number on file is (610) 896-0280. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Gerard J. Diefes?
Gerard J. Diefes's National Provider Identifier is 1417948951. 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
Where did Gerard J. Diefes train?
Gerard J. Diefes attended Hahnemann University College of Medicine, graduating in 1992. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Gerard J. Diefes have?
Gerard J. Diefes has 34 years experience. Calculated from a graduation year of 1992, reported in the CMS National Downloadable File.
CMS public data
What does Gerard J. Diefes do most often?
According to Medicare billing data, Gerard J. Diefes provides treatments such as test to examine how well the lungs exchange gases and test to determine lung volumes using gas dilution or washout, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Gerard J. Diefes's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Gerard J. Diefes. If this is you, claiming it is free.
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