Oscar Perozo Alfonzo, MD
NPI 1831619238 · Anesthesiology Physician · Lawrence, MA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Oscar Perozo Alfonzo, MD is a Anesthesiology Physician provider in Lawrence, MA (NPI 1831619238).
Provider details
- NPI number
- 1831619238
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 290666 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
8 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
135 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) |
|---|---|---|
| Injection of Anesthetic Agent And/Or Steroid Into Thigh Nerve (femoral Nerve)64447 | 44 | $59 |
| Injection of Anesthetic Agent And/Or Steroid Into Arm Nerve Bundle (brachial Plexus)64415 | 24 | $69 |
| Injection of Anesthetic Agent And/Or Steroid Into Lower Back and Leg Nerve (sciatic Nerve)64445 | 21 | $73 |
| Anesthesia for Other Procedure on Skin of Arms, Legs, and Front Body00400 | 12 | $90 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 12 | $82 |
| Anesthesia for Other Procedure on Urinary System Through Urethra00910 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$17 across 1 record (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)
- 800 Washington StBoston, MA 02111Phone: (617) 636-5000
Registry dates
- Enumerated
- 2017-06-27
- Last updated
- 2024-02-08
- Certified
- 2024-02-08
Frequently asked questions
- What is Oscar Perozo Alfonzo's NPI number?
- Oscar Perozo Alfonzo's National Provider Identifier (NPI) is 1831619238, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Oscar Perozo Alfonzo's specialty?
- Oscar Perozo Alfonzo is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Oscar Perozo Alfonzo located?
- Oscar Perozo Alfonzo's practice location on file with NPPES is 1 General St, Lawrence, MA 01841-2961.
- What is Oscar Perozo Alfonzo's phone number?
- The practice phone number listed in the NPPES registry for Oscar Perozo Alfonzo is (978) 683-4000.
- Does Oscar Perozo Alfonzo accept Medicare?
- Oscar Perozo Alfonzo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Oscar Perozo Alfonzo's NPI active?
- Yes — Oscar Perozo Alfonzo's NPI (1831619238) is active in the NPPES registry as of the last update on 2024-02-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.