Roy Marie Margallo, M.D.
NPI 1538314950 · Internal Medicine Physician · Las Vegas, NV
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Roy Marie Margallo, M.D. is a Internal Medicine Physician provider in Las Vegas, NV (NPI 1538314950).
Provider details
- NPI number
- 1538314950
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 14033 (NV)
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
17 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
2,606 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 Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 757 | $72 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 619 | $104 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 | 240 | $176 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 142 | $125 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 139 | $123 |
| Removal of Skin and Tissue, 20.0 Sq Cm Or Less |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 54 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 139 | 46 |
| Levothyroxine Sodium | 93 | 30 |
| Atorvastatin Calcium | 89 | 36 |
| Tamsulosin Hcl | 81 | 27 |
| Furosemide | 80 | 29 |
| Losartan Potassium | 77 | 29 |
| Metformin Hcl | 63 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$299 across 15 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
- 2008-11-26
- Last updated
- 2026-04-23
- Certified
- 2026-04-23
Frequently asked questions
- What is Roy Marie Margallo's NPI number?
- Roy Marie Margallo's National Provider Identifier (NPI) is 1538314950, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Roy Marie Margallo's specialty?
- Roy Marie Margallo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Roy Marie Margallo located?
- Roy Marie Margallo's practice location on file with NPPES is 2255 Renaissance Dr Ste B, Las Vegas, NV 89119-6795.
- What is Roy Marie Margallo's phone number?
- The practice phone number listed in the NPPES registry for Roy Marie Margallo is (702) 500-1728.
- Does Roy Marie Margallo accept Medicare?
- Roy Marie Margallo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Roy Marie Margallo's NPI active?
- Yes — Roy Marie Margallo's NPI (1538314950) is active in the NPPES registry as of the last update on 2026-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.