Merrit Gadallah, MD
NPI 1871531319 · Nephrology Physician · Naples, FL
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Merrit Gadallah, MD is a Nephrology Physician provider in Naples, FL (NPI 1871531319).
Provider details
- NPI number
- 1871531319
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- ME72275 (FL)
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
1,060 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 | 340 | $129 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 226 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 226 | $182 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 121 | $358 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 77 | $128 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 58 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 217 | 70 |
| Calcitriol | 180 | 54 |
| Rosuvastatin Calcium | 166 | 48 |
| Allopurinol | 103 | 35 |
| Hydrochlorothiazide | 100 | 35 |
| Atorvastatin Calcium | 99 | 32 |
| Carvedilol | 87 | 29 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$181 across 9 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
- 2006-06-04
- Last updated
- 2008-05-06
Frequently asked questions
- What is Merrit Gadallah's NPI number?
- Merrit Gadallah's National Provider Identifier (NPI) is 1871531319, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Merrit Gadallah's specialty?
- Merrit Gadallah is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Merrit Gadallah located?
- Merrit Gadallah's practice location on file with NPPES is 1213 Piper Blvd, Naples, FL 34110-1393.
- What is Merrit Gadallah's phone number?
- The practice phone number listed in the NPPES registry for Merrit Gadallah is (239) 254-0099.
- Does Merrit Gadallah accept Medicare?
- Merrit Gadallah is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Merrit Gadallah's NPI active?
- Yes — Merrit Gadallah's NPI (1871531319) is active in the NPPES registry as of the last update on 2008-05-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.