Alyssa Zupon, MD
NPI 1184113110 · Emergency Medicine Physician · Boston, MA
Provider details
- NPI number
- 1184113110
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
494 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 High Level of Medical Decision Making99285 | 313 | $174 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 69 | $119 |
| Critical Care, First 30-74 Minutes99291 | 55 | $211 |
| Critical Care, Each Additional 30 Minutes99292 | 28 | $106 |
| Ultrasound of Heart, Follow-Up93308 | 15 | $25 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 14 | $70 |
Typical Medicare-allowed amounts for these services range $25–$211 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
Practice location
Mailing address
Additional practice locations (1)
- 55 Fruit StMassachusetts General Hospital Emergency DepartmentBoston, MA 02224Phone: (617) 724-4100
Registry dates
- Enumerated
- 2018-05-04
- Last updated
- 2022-06-29
- Certified
- 2022-06-28
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.