MARLEE DIANA THOMAS DO
NPI 1437736014
Emergency Medicine in Springfield, MA
About Marlee Diana Thomas Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARLEE DIANA THOMAS DO (NPI 1437736014) is an individual emergency medicine provider in Springfield, Massachusetts, licensed in Massachusetts (1022823) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2021).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Marlee Diana Thomas Do 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 Marlee Thomas 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
Mansfield, OH 44903
- Reassigned Medicare billing, Ohio enrollment
- 125 clinicians in this Medicare group
Springfield, OH 45503
- Reassigned Medicare billing, Ohio enrollment
- 151 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 2
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.
Physician 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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 Marlee Thomas's NPI number?
The NPI number for Marlee Thomas is 1437736014. It was assigned to this individual provider in the NPPES registry on March 28, 2021.
Where is Marlee Thomas located?
Marlee Thomas practices at 759 Chestnut St # S6538, Springfield, MA 01107. The listed phone number is (413) 794-3233.
What is Marlee Thomas's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Marlee Thomas enrolled in Medicare?
Yes. Marlee Thomas 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 Marlee Thomas's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marlee Thomas reassigns Medicare benefits to 3 organizations: Baystate Medical Practices, Inc (Springfield, MA), Mid-Ohio Emergency Group, LLC (Mansfield, OH) and Emergency Medicine Specialists, Inc (Springfield, OH). 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 Marlee Thomas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marlee Thomas accept?
Health plans from CareSource and Taro Health list Marlee Thomas 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.
When was this NPI record last updated?
The NPPES record for Marlee Thomas was last updated on November 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.
# Marlee Diana Thomas, DO · NPI 1437736014
Emergency Medicine physician in Springfield, Massachusetts. Individual provider, active in the CMS NPPES registry since March 28, 2021.
## Identity
- **NPI:** 1437736014 (Entity type: Individual)
- **Enumerated:** March 28, 2021
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 1022823 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 759 CHESTNUT ST # S6538, 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); Mid-Ohio Emergency Group, LLC (NPI 1881164010, Mansfield, OH); Emergency Medicine Specialists, Inc (NPI 1104572841, Springfield, OH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2021
## Record status
- **NPPES last updated:** November 17, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1437736014) · Data from the CMS NPPES public registry.