JUSTUS GUERRIERI M.D.
NPI 1386900975
Emergency Medicine in Northampton, MA
About Justus Guerrieri M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JUSTUS GUERRIERI M.D. (NPI 1386900975) is an individual emergency medicine provider in Northampton, Massachusetts, licensed in Massachusetts (263111) and active in the NPI registry since April 2012. He is enrolled in Medicare PECOS, is affiliated with Baystate Wing Hospital, and is a graduate of Temple University School Of Medicine (2012).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Justus Guerrieri M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Justus Guerrieri reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Springfield, MA 01199
- Reassigned Medicare billing, Massachusetts enrollment
- 1,537 clinicians in this Medicare group
Greenfield, MA 01301
- Reassigned Medicare billing, Massachusetts enrollment
- 78 clinicians in this Medicare group
Palmer, MA 01069
- Reassigned Medicare billing, Massachusetts enrollment
- 86 clinicians in this Medicare group
Hartford, CT 06105
- Reassigned Medicare billing, Connecticut enrollment
- 1,186 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Baystate Wing Hospital
Acute Care Hospitals · Palmer, MABaystate Noble Hospital
Acute Care Hospitals · Westfield, MABaystate Medical Center
Acute Care Hospitals · Springfield, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01060 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NORTHAMPTON, MA 01060
NORTHAMPTON, MA 01060
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Justus Guerrieri's NPI number?
The NPI number for Justus Guerrieri is 1386900975. It was assigned to this individual provider in the NPPES registry on April 8, 2012.
Where is Justus Guerrieri located?
Justus Guerrieri practices at 30 Locust St, Northampton, MA 01060. The listed phone number is (413) 582-2363.
What is Justus Guerrieri's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Justus Guerrieri enrolled in Medicare?
Yes. Justus Guerrieri is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Justus Guerrieri's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Justus Guerrieri reassigns Medicare benefits to 4 organizations: Baystate Medical Practices, Inc (Springfield, MA), Baystate Franklin Medical Center (Greenfield, MA), Baystate Wing Hospital Corporation (Palmer, MA) and Trinity Health Of New England Provider Network Organization Inc (Hartford, CT). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Justus Guerrieri's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Justus Guerrieri accept?
Health plans from Taro Health list Justus Guerrieri as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Justus Guerrieri affiliated with any hospitals?
According to CMS data, Justus Guerrieri is affiliated with Baystate Wing Hospital, Baystate Noble Hospital and Baystate Medical Center.
When was this NPI record last updated?
The NPPES record for Justus Guerrieri was last updated on June 16, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Justus Guerrieri, M.D. · NPI 1386900975
Emergency Medicine physician in Northampton, Massachusetts. Individual provider, active in the CMS NPPES registry since April 8, 2012.
## Identity
- **NPI:** 1386900975 (Entity type: Individual)
- **Enumerated:** April 8, 2012
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 263111 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 30 LOCUST ST, Northampton, MA 01060-2052
- **Phone:** (413) 582-2363 · **Fax:** (413) 582-2914
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Baystate Medical Practices, Inc (NPI 1548205909, Springfield, MA); Baystate Franklin Medical Center (NPI 1508867391, Greenfield, MA); Baystate Wing Hospital Corporation (NPI 1962410233, Palmer, MA); Trinity Health Of New England Provider Network Organization Inc (NPI 1003882812, Hartford, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Temple University School Of Medicine, class of 2012
## Record status
- **NPPES last updated:** June 16, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1386900975) · Data from the CMS NPPES public registry.