Marlee Diana Thomas, DO
Emergency Medicine Physician · Springfield, MA
Marlee Diana Thomas, DO is an emergency medicine physician with a practice address in Springfield, Massachusetts, and NPI 1437736014, issued on Mar 28, 2021. Check the license (Massachusetts 1022823, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Marlee Diana Thomas
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 1022823 MA
34.016548 OH
Self-reported in NPPES; status is on the state search - Practice location
- 759 Chestnut St # S6538, Springfield, MA 01107
- Phone
- (413) 794-3233
- Enumerated
- Mar 28, 2021
- Record last updated
- Nov 17, 2025
- Fax
- (413) 794-9060
- Medicare enrollment
- Enrolled (PECOS I20251209001158); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Also registered at 759 Chestnut St # S6538
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mackay Burgon, DOEmergency Medicine Physician1194427096
- Andrew Chambers, DOEmergency Medicine Physician1679065338
- Brittany Chew, DNPFamily Nurse Practitioner1194234963
- Emily Chute, NPPediatric Nurse Practitioner1154065365
- Michael Cooper, MDPediatric Emergency Medicine (Pediatrics) Physician1083859698
- Cassidy Cunningham, DOEmergency Medical Services (Emergency Medicine) Physician1861133134
Verify Marlee Diana Thomas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1022823Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average emergency medicine physician in 2024
147 Medicare Part D claims for 83 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Famotidine14 claims
- Ondansetron Odt14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 85.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Baystate Medical Practices IncSpringfield, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marlee Diana Thomas among 1,829 emergency medicine physician records in Massachusetts
Marlee Diana Thomas, DO is one of 1,829 emergency medicine physician records with a practice address in Massachusetts. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 92% of them.
- NPI issued2021 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2021 · median 2011 among the 1,200 with a school on file
- Record last updated2025 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
123 emergency medicine physician records list a practice address in Springfield
They are 123 of the 8,553 NPPES records with a practice address in Springfield, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Springfield → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Vanna Albert, MDSpringfield, MA 011071548680952
- Rebecca Barron, M.D.Springfield, MA 011071811280027
- Ryan Clark, D.O.Springfield, MA 011071699160374
- Seth Gemme, M.D.Springfield, MA 011071174883110
- Dersim Kaya, MDSpringfield, MA 011071780090654
- Agnieszka Nicora, MDSpringfield, MA 011071003080151
- Erica Ogle, D.O.Springfield, MA 011071962847459
- Matthew Opacic, MDSpringfield, MA 011071023285517
Common questions
What is Marlee Diana Thomas, DO's NPI number?
Marlee Diana Thomas, DO's National Provider Identifier (NPI) is 1437736014, issued on Mar 28, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Marlee Diana Thomas, DO located?
The NPPES record lists a practice address at 759 Chestnut St # S6538, Springfield, MA, 01107. Phone: (413) 794-3233. Providers update this record themselves, so call before visiting.
How can I verify Marlee Diana Thomas, DO's license?
NPPES lists Massachusetts license number 1022823, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marlee Diana Thomas, DO prescribe under Medicare Part D?
In 2024, Marlee Diana Thomas, DO had 147 Medicare Part D claims for 83 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Marlee Diana Thomas, DO's MIPS final score?
The 2023 MIPS final score is 85.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.