William Velasco Perez, MD
NPI 1982723383 · Emergency Medicine Physician · Guaynabo, PR
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Velasco Perez, MD is a Emergency Medicine Physician provider in Guaynabo, PR (NPI 1982723383).
Provider details
- NPI number
- 1982723383
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 12892 (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
19 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
558 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 224 | $8 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 198 | $180 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 84 | $124 |
| Critical Care, First 30-74 Minutes99291 | 52 | $217 |
Typical Medicare-allowed amounts for these services range $8–$217 (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 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tramadol Hcl | 32 | 32 |
| Cephalexin | 31 | 31 |
| Prednisone | 31 | 29 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 27 | 26 |
| Ondansetronbrand: Ondansetron Odt | 19 | 19 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 18 | 18 |
| Diclofenac Sodium | 16 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-28
- Last updated
- 2011-01-27
Frequently asked questions
- What is William Velasco Perez's NPI number?
- William Velasco Perez's National Provider Identifier (NPI) is 1982723383, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Velasco Perez's specialty?
- William Velasco Perez is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Velasco Perez located?
- William Velasco Perez's practice location on file with NPPES is Pmb 206, Guaynabo, PR 00970-0206.
- What is William Velasco Perez's phone number?
- The practice phone number listed in the NPPES registry for William Velasco Perez is (787) 409-4175.
- Does William Velasco Perez accept Medicare?
- William Velasco Perez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Velasco Perez's NPI active?
- Yes — William Velasco Perez's NPI (1982723383) is active in the NPPES registry as of the last update on 2011-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.