Mosab Frefer, MD
NPI 1659800977 · Internal Medicine Physician · Tucson, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mosab Frefer, MD is a Internal Medicine Physician provider in Tucson, AZ (NPI 1659800977).
Provider details
- NPI number
- 1659800977
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 60805 (AZ)
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
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
3,288 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 916 | $104 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 845 | $75 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 367 | $113 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 293 | $71 |
| Subsequent Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, at Least 45 Minutes99310 | 192 | $148 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 154 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 422 | 134 |
| Gabapentin | 365 | 102 |
| Levothyroxine Sodium | 355 | 94 |
| Amlodipine Besylate | 307 | 98 |
| Furosemide | 263 | 69 |
| Apixabanbrand: Eliquis | 246 | 50 |
| Trazodone Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$205 across 10 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
Additional practice locations (1)
- 450 Clarkson Ave # 1262Brooklyn, NY 11203-2012Phone: (718) 270-8867
Registry dates
- Enumerated
- 2017-06-09
- Last updated
- 2026-03-26
- Certified
- 2026-03-26
Frequently asked questions
- What is Mosab Frefer's NPI number?
- Mosab Frefer's National Provider Identifier (NPI) is 1659800977, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mosab Frefer's specialty?
- Mosab Frefer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mosab Frefer located?
- Mosab Frefer's practice location on file with NPPES is 1100 N El Dorado Pl, Tucson, AZ 85715-4606.
- What is Mosab Frefer's phone number?
- The practice phone number listed in the NPPES registry for Mosab Frefer is (520) 526-2068.
- Does Mosab Frefer accept Medicare?
- Mosab Frefer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mosab Frefer's NPI active?
- Yes — Mosab Frefer's NPI (1659800977) is active in the NPPES registry as of the last update on 2026-03-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.