ZACHARY M TESTO M.D.
NPI 1326458944
Emergency Medicine in Springfield, MA
About Zachary M Testo M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ZACHARY M TESTO M.D. (NPI 1326458944) is an individual emergency medicine provider in Springfield, Massachusetts, licensed in Massachusetts (270320) and active in the NPI registry since May 2014. He is enrolled in Medicare PECOS, is affiliated with Baystate Medical Center, and is a graduate of Albany Medical College Of Union University (2014).
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
Zachary M Testo 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
3Medicare enrollment records show Zachary Testo reassigns Medicare billing to 3 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
Palmer, MA 01069
- Reassigned Medicare billing, Massachusetts enrollment
- 86 clinicians in this Medicare group
Greenfield, MA 01301
- Reassigned Medicare billing, Massachusetts enrollment
- 78 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 3
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Baystate Medical Center
Acute Care Hospitals · Springfield, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01107 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.
SPRINGFIELD, MA 01107
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 Zachary Testo's NPI number?
The NPI number for Zachary Testo is 1326458944. It was assigned to this individual provider in the NPPES registry on May 5, 2014.
Where is Zachary Testo located?
Zachary Testo practices at 759 Chestnut St, Springfield, MA 01107. The listed phone number is (413) 794-3233.
What is Zachary Testo's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Zachary Testo enrolled in Medicare?
Yes. Zachary Testo 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 Zachary Testo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Zachary Testo reassigns Medicare benefits to 3 organizations: Baystate Medical Practices, Inc (Springfield, MA), Baystate Wing Hospital Corporation (Palmer, MA) and Baystate Franklin Medical Center (Greenfield, MA). 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 Zachary Testo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Zachary Testo accept?
Health plans from Taro Health list Zachary Testo 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 Zachary Testo affiliated with any hospitals?
According to CMS data, Zachary Testo is affiliated with Baystate Medical Center.
When was this NPI record last updated?
The NPPES record for Zachary Testo was last updated on February 15, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Zachary M Testo, M.D. · NPI 1326458944
Emergency Medicine physician in Springfield, Massachusetts. Individual provider, active in the CMS NPPES registry since May 5, 2014.
## Identity
- **NPI:** 1326458944 (Entity type: Individual)
- **Enumerated:** May 5, 2014
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 270320 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 759 CHESTNUT ST, Springfield, MA 01107-1619
- **Phone:** (413) 794-3233 · **Fax:** (413) 794-9060
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Baystate Medical Practices, Inc (NPI 1548205909, Springfield, MA); Baystate Wing Hospital Corporation (NPI 1962410233, Palmer, MA); Baystate Franklin Medical Center (NPI 1508867391, Greenfield, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Albany Medical College Of Union University, class of 2014
## Record status
- **NPPES last updated:** February 15, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1326458944) · Data from the CMS NPPES public registry.