Mazen Khusayem, MD
NPI 1285604934 · Internal Medicine Physician · Clayton, NC
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mazen Khusayem, MD is a Internal Medicine Physician provider in Clayton, NC (NPI 1285604934).
Provider details
- NPI number
- 1285604934
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 9900898 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,873 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 840 | $124 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 630 | $16 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 268 | $127 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 226 | $88 |
| Automated Urinalysis Test81003 | 189 | $2 |
| Advance Care Planning, First 30 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 192 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 905 | 258 |
| Amlodipine Besylate | 665 | 186 |
| Levothyroxine Sodium | 626 | 160 |
| Gabapentin | 490 | 147 |
| Metformin Hcl | 489 | 145 |
| Pantoprazole Sodium | 407 | 119 |
| Carvedilol | 376 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,189 across 94 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-25
- Last updated
- 2007-08-06
Frequently asked questions
- What is Mazen Khusayem's NPI number?
- Mazen Khusayem's National Provider Identifier (NPI) is 1285604934, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mazen Khusayem's specialty?
- Mazen Khusayem is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mazen Khusayem located?
- Mazen Khusayem's practice location on file with NPPES is 301 Amos St, Clayton, NC 27520-2644.
- What is Mazen Khusayem's phone number?
- The practice phone number listed in the NPPES registry for Mazen Khusayem is (919) 550-6336.
- Does Mazen Khusayem accept Medicare?
- Mazen Khusayem is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mazen Khusayem's NPI active?
- Yes — Mazen Khusayem's NPI (1285604934) is active in the NPPES registry as of the last update on 2007-08-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.