Margarita Martino Villanueva, M.D.
NPI 1801852868 · Emergency Medicine Physician · San Juan, PR
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margarita Martino Villanueva, M.D. is a Emergency Medicine Physician provider in San Juan, PR (NPI 1801852868).
Provider details
- NPI number
- 1801852868
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 15955 (PR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
454 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 185 | $121 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 169 | $175 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 69 | $8 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 31 | $71 |
Typical Medicare-allowed amounts for these services range $8–$175 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 92 | 91 |
| Cephalexin | 49 | 48 |
| Naproxen | 37 | 37 |
| Tramadol Hcl | 29 | 29 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 23 | 22 |
| Ondansetronbrand: Ondansetron Odt | 21 | 21 |
| Cyclobenzaprine Hcl | 18 | 18 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-26
- Last updated
- 2026-02-16
- Certified
- 2026-02-16
Frequently asked questions
- What is Margarita Martino Villanueva's NPI number?
- Margarita Martino Villanueva's National Provider Identifier (NPI) is 1801852868, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margarita Martino Villanueva's specialty?
- Margarita Martino Villanueva is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margarita Martino Villanueva located?
- Margarita Martino Villanueva's practice location on file with NPPES is 400 Cordoba Park/Bo Tortugo St., San Juan, PR 00926-9769.
- What is Margarita Martino Villanueva's phone number?
- The practice phone number listed in the NPPES registry for Margarita Martino Villanueva is (787) 708-3802.
- Does Margarita Martino Villanueva accept Medicare?
- Margarita Martino Villanueva is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margarita Martino Villanueva's NPI active?
- Yes — Margarita Martino Villanueva's NPI (1801852868) is active in the NPPES registry as of the last update on 2026-02-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.