Physician Profile
Unclaimed ProfileAbout DIFFENDERFER
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Education & Training
Areas of Expertise
Common questions
What is Dr. Diffenderfer's specialty?
Dr. Diffenderfer is a physician assistant in Bel Air, MD. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “PHYSICIAN ASSISTANT”.
NPI registry
Where can I find Dr. Diffenderfer?
Dr. Diffenderfer is listed at 510 UPPER CHESAPEAKE DR., SUITE 417 PHYSICIANS PAVILLION II, Bel Air, MD 21014. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Diffenderfer?
The number on file is (443) 643-3130. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Diffenderfer?
Dr. Diffenderfer's National Provider Identifier is 1679857239. 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 Dr. Diffenderfer's medical education?
Dr. Diffenderfer attended Other, graduating in 2011. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Diffenderfer have?
Dr. Diffenderfer has 15 years experience. Calculated from a graduation year of 2011, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Diffenderfer known for?
According to Medicare billing data, Dr. Diffenderfer performs procedures including replacement of knee joint, both sides of knee, aspiration and/or injection of fluid from large joint and replacement of thigh bone and hip joint with prosthesis; provides treatments such as injection of drug or substance under skin or into muscle, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Diffenderfer's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Diffenderfer. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (443) 643-3130
- Email not available
Practice Locations
510 UPPER CHESAPEAKE DR., SUITE 417 PHYSICIANS PAVILLION II
Bel Air, MD 21014
Procedures Most Often Billed to Medicare
24,520 services · 875 patients · 14 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Replacement of knee joint, both sides of knee | Procedure | 27447 |
38 |
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
22 |
| Replacement of thigh bone and hip joint with prosthesis | Procedure | 27130 |
16 |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
260 |
| Injection, denosumab, 1 mg | Drug given | J0897 |
12,180 |
| Injection, romosozumab-aqqg, 1 mg | Drug given | J3111 |
11,340 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
405 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
67 |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
57 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
51 |
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 physician assistants at this location 3
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 5
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 — 31 related providers in 4 groups
Other physician assistants in Bel Air 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2011 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Replacement of knee joint, both sides of knee 8
Providers in MD who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.