Doctor profile · Federal record
Dr. GERARD DIEFES, M.D.
Pulmonary Disease Physician (CMS: PULMONARY DISEASE) · Critical Care Medicine (Internal Medicine) Physician · Sleep Medicine (Internal Medicine) Physician · WYNNEWOOD, PA
- NPI 1417948951
- Accepts Medicare
- MIPS 92.1 / 100 · 2023
- 34 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
1001 CITY LINE AVE, WB 113
WYNNEWOOD, PA 190963902
(610) 896-0280
fax (610) 896-0286 - Additional location
-
736 W Lincoln Hwy
Exton, PA 193412547
(610) 359-5858
Credentials & registration
- NPI registered
- November 2005 — 21 yrs on file
- Profile last updated
- May 20, 2025
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207RP1001X — NUCC code
- State license (1)
- Pennsylvania #MD056949L
- Medicaid
- PA #001781333
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1417948951. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,745
Distinct HCPCS
10
Medicare allowed
$191,476
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 973 | 163 | $83 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 204 | 93 | $125 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 128 | 80 | $134 | |
99291 |
Critical care, first 30-74 minutes | 127 | 49 | $224 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 84 | 77 | $182 | |
99239 |
Hospital discharge day management, more than 30 minutes | 84 | 73 | $120 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 58 | 56 | $137 | |
94727 |
Test to determine lung volumes using gas dilution or washout | 22 | 21 | $47 | |
94729 |
Test to examine how well the lungs exchange gases | 22 | 21 | $61 | |
94010 |
Test to measure expiratory airflow and volume | 18 | 17 | $29 |
In context: peer comparison
Among 10 peers in this city , average services per provider: 121. This provider delivers 14× the peer median.Open Payments
Industry payments received
All-time total
$1,228
Transactions
53
Manufacturers
12
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| GlaxoSmithKline, LLC. | 18 | $347.62 | |
| GENZYME CORPORATION | 7 | $149.83 | |
| AstraZeneca Pharmaceuticals LP | 7 | $132.97 | |
| Regeneron Healthcare Solutions, Inc. | 5 | $127.35 | |
| Mallinckrodt Hospital Products Inc. | 5 | $107.48 | |
| SANOFI-AVENTIS U.S. LLC | 1 | $99.95 | |
| HARMONY BIOSCIENCES LLC | 3 | $95.79 | |
| Insmed, Inc. | 3 | $81.80 | |
| United Therapeutics Corporation | 1 | $24.60 | |
| Paratek Pharmaceuticals, Inc. | 1 | $22.27 | |
| Mylan Specialty L.P. | 1 | $20.34 | |
| JAZZ PHARMACEUTICALS INC. | 1 | $17.58 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
916
Patients
240
Total drug cost
$321,059
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 233 | 56 | $8,658 |
| Trelegy Ellipta (Fluticasone/Umeclidin/Vilanter) | Brand | 203 | 39 | $184,799 |
| Prednisone | Generic | 110 | 53 | $411 |
| Montelukast Sodium | Generic | 55 | 13 | $1,042 |
| Breztri Aerosphere (Budesonide/Glycopyr/Formoterol) | Brand | 42 | 0 | $27,267 |
| Anoro Ellipta (Umeclidinium Brm/Vilanterol Tr) | Brand | 41 | 0 | $22,583 |
| Symbicort (Budesonide/Formoterol Fumarate) | Brand | 34 | 11 | $16,935 |
| Stiolto Respimat (Tiotropium Br/Olodaterol Hcl) | Brand | 29 | 0 | $16,068 |
| Atorvastatin Calcium | Generic | 28 | 27 | $254 |
| Eliquis (Apixaban) | Brand | 27 | 16 | $14,532 |