Doctor profile · Federal record
Dr. Benjamin Diffenderfer, PA-C
Physician Assistant · Bel Air, MD
- NPI 1679857239
- Accepts Medicare
- 15 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
510 Upper Chesapeake Dr., Suite 417, Physicians Pavillion II
Bel Air, MD 21014
(443) 643-3130
fax (443) 643-3155
Credentials & registration
- NPI registered
- September 2011 — 15 yrs on file
- Year of graduation
- 2011 — 15 yrs since
- Specialty taxonomy
- 363A00000X — NUCC code
- State license (1)
- Maryland #C0004567
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1679857239. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
40,529
Distinct HCPCS
10
Medicare allowed
$605,870
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J3111 |
Injection, romosozumab-aqqg, 1 mg | 28,980 | 26 | $10 | |
J0897 |
Injection, denosumab, 1 mg | 10,380 | 111 | $23 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 467 | 273 | $81 | |
96372 |
Injection of drug or substance under skin or into muscle | 312 | 131 | $13 | |
J0702 |
Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg | 74 | 14 | $7 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 58 | 58 | $150 | |
20610 |
Aspiration and/or injection of fluid from large joint | 47 | 27 | $70 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 41 | 41 | $101 | |
27447 |
Replacement of knee joint, both sides of knee | 35 | 35 | $188 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 28 | 27 | $115 |
In context: peer comparison
Among 15 peers in this city , average services per provider: 316. This provider delivers 128× the peer median.Open Payments
Industry payments received
All-time total
$2,858
Transactions
11
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Radius Health, Inc. | 6 | $2,606.28 | |
| Amgen Inc. | 4 | $209.99 | |
| Supreme Orthopedic Systems, LLC | 1 | $41.44 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
379
Patients
156
Total drug cost
$344,923
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Alendronate Sodium | Generic | 137 | 44 | $1,613 |
| Tymlos (Abaloparatide) | Brand | 79 | 11 | $247,763 |
| Oxycodone Hcl | Generic | 35 | 34 | $226 |
| Ibandronate Sodium | Generic | 27 | 0 | $1,003 |
| Forteo (Teriparatide) | Brand | 22 | 0 | $93,814 |
| Cefadroxil | Generic | 19 | 19 | $197 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 18 | 18 | $89 |
| Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) | Brand | 16 | 16 | $98 |
| Gabapentin | Generic | 15 | 14 | $70 |
| Cyclobenzaprine Hcl | Generic | 11 | 0 | $50 |
Hospital affiliations
Frequently asked questions
What is Dr. Benjamin Diffenderfer's medical specialty?
Dr. Benjamin Diffenderfer practices Physician Assistant in Bel Air, MD.
Where does Dr. Benjamin Diffenderfer practice?
Dr. Benjamin Diffenderfer practices at 510 Upper Chesapeake Dr., Suite 417, Bel Air, MD 21014. Office phone: 4436433130.
What is Dr. Benjamin Diffenderfer's NPI?
Dr. Benjamin Diffenderfer's National Provider Identifier (NPI) is 1679857239, issued by NPPES.
Does Dr. Benjamin Diffenderfer accept Medicare assignment?
Yes. Dr. Benjamin Diffenderfer accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Benjamin Diffenderfer commonly perform?
Top Medicare-reported procedures in 2023: Injection, romosozumab-aqqg, 1 mg (HCPCS J3111); Injection, denosumab, 1 mg (HCPCS J0897); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.