Doctor profile · Federal record
Dr. Justin Mazzillo, M.D.
Emergency Medicine Physician (CMS: Emergency Medicine) · Emergency Medicine Physician · Keene, NH
- NPI 1487924304
- Accepts Medicare
- 16 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
590 Court St
Keene, NH 034311719
(603) 354-5454
Credentials & registration
- NPI registered
- January 2012 — 14 yrs on file
- Profile last updated
- August 28, 2013
- Year of graduation
- 2010 — 16 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State licenses (2)
- New Hampshire #16046 · Texas #P1670
- Medicaid
- NH #3085790
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1487924304. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
57
Distinct HCPCS
2
Medicare allowed
$8,737
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 39 | 39 | $170 | |
99284 |
Emergency department visit with moderate level of medical decision making | 18 | 18 | $117 |
In context: peer comparison
Among 10 peers in Keene Emergency Medicine Physician, average services per provider: 75. This provider delivers 0.8× the peer median.Frequently asked questions
What is Dr. Justin Mazzillo's medical specialty?
Dr. Justin Mazzillo practices Emergency Medicine Physician in Keene, NH.
Where does Dr. Justin Mazzillo practice?
Dr. Justin Mazzillo practices at 590 Court St, Keene, NH 034311719. Office phone: 6033545454.
What is Dr. Justin Mazzillo's NPI?
Dr. Justin Mazzillo's National Provider Identifier (NPI) is 1487924304, issued by NPPES.
Does Dr. Justin Mazzillo accept Medicare assignment?
Yes. Dr. Justin Mazzillo accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Justin Mazzillo commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.