Dr. Thomas Britton Percy, MD
- Medicare services, 2024
- 181
- Medicare patients, 2024
- 120
- Part D claims, 2024
- 985
- Hospital affiliations
- 2
- Industry payments
- $48
- Practice address
- 759 Chestnut St, Springfield, MA 01107
- Practice phone
- Call (413) 794-0000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Baystate Medical Center
Springfield, Massachusetts
Find Dr. Percy's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Thomas Britton Percy is an internist in Springfield, Massachusetts
Dr. Percy practices at Baystate Medical Center in Springfield, Massachusetts.
Dr. Percy's NPI, 1699709352, was assigned on July 10, 2006. Dr. Percy graduated from University of Cincinnati College of Medicine in 1993. Dr. Percy holds Massachusetts license 151347.
- NPI
- 1699709352NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2062436959
- NPI enumeration date
- July 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (413) 794-0000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas Britton Percy practices at Baystate Medical Center in Springfield, Massachusetts
Dr. Percy's primary practice is Baystate Medical Center, at 759 Chestnut St, Springfield, MA 01107 in Hampden County. The practice phone is (413) 794-0000.
- Baystate Medical Center759 Chestnut St, Springfield, MA 01107 · Hampden CountyPhone(413) 794-0000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Thomas Britton Percy is affiliated with 4 sites of care and 4 medical groups
Dr. Percy's primary practice is Baystate Medical Center in Springfield, Massachusetts. Dr. Percy is also affiliated with Cooley Dickinson Hospital. The medical group on file is Baystate Medical Practices. Dmand AI also links Dr. Percy to 1 more hospital, 3 medical groups and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thomas Britton Percy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Percy practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Baystate Medical Center | Available with a free account |
| +3 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas Britton Percy is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Percy's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Percy is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Percy
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Thomas Britton Percy billed Medicare for 181 services in 2024
CMS data shows 181 Medicare services from Dr. Percy across 5 procedure codes in 2024, for 120 Medicare patients. Medicare paid $16,466 for them.
Dr. Percy's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5952024: 15674%
- Tests and treatments
- 2023: 02024: 25
Where Dr. Percy's Medicare services took place, 2024
- In an office8346%
- In a facility9854%
Dr. Percy compared with the Massachusetts median for internists, 2024
- Dr. Percy
- Massachusetts median
- Medicare services
- 181vs 43158% below
- Medicare patients
- 120vs 19438% below
- Part D claims
- 829vs 4022.1 times
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Percy's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Percy and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas Britton Percy treated 120 Medicare patients in 2024, average age 78
CMS counts 120 Medicare patients who saw Dr. Percy in 2024. The largest group is 75 to 84, with 54 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 1.61, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Percy's median patient age at 77, with 59% women.
Dr. Percy's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Percy's Medicare patients by sex, 2024
- Women7260%
- Men4840%
Chronic conditions among Dr. Percy's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis56%
- Alzheimer's and dementia54%
- Mood disorders43%
- Anxiety39%
- Depression38%
- Diabetes34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Percy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women59%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Britton Percy wrote 985 Medicare Part D claims in 2024
In 2024, Dr. Percy wrote 985 Medicare Part D claims for 236 patients. 96% of them were for generic drugs. CMS names the drug for 829 of them, across 11 drugs with 11 or more claims each, at $27,749 in total drug cost. In 2023, CMS named 175 claims across 7 drugs.
Dr. Percy's Part D claims by kind of drug, 2024
- Generic950 claims96%
- Brand-name35 claims4%
Dr. Percy's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Percy's Part D claims, 2024
- Antibiotics2%19 of 985 claims
- Antipsychotics, patients 65 and over5%47 of 985 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1752024: 829374%
Drugs named by CMS: 11 in 2024, 7 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Thomas Britton Percy offers telehealth to Medicare patients
Dr. Percy accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Percy as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Thomas Britton Percy received $48 in industry payments in 2016
CMS Open Payments shows 3 general payments to Dr. Percy from 2 drug and device companies in 2016. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $28.
Companies that paid Dr. Percy the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas Britton Percy graduated from University of Cincinnati College of Medicine
Dr. Percy graduated from University of Cincinnati College of Medicine in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas Britton Percy's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Thomas Britton Percy
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Thomas Britton Percy's NPI number?
Dr. Thomas Britton Percy's NPI number is 1699709352. It was assigned on July 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Britton Percy?
Dr. Thomas Britton Percy is an internist in Springfield, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Thomas Britton Percy practice?
Dr. Percy practices at 759 Chestnut St, Springfield, MA 01107. Dr. Percy's primary practice is Baystate Medical Center in Springfield, Massachusetts. Dmand AI also links Dr. Percy to 1 hospital, 3 medical groups and 1 group practice or clinic.
What is Dr. Thomas Britton Percy's office phone number?
The practice phone on file for Dr. Percy is (413) 794-0000.
What is Dr. Thomas Britton Percy's medical license number?
Dr. Percy holds Massachusetts license 151347.
Which hospitals is Dr. Thomas Britton Percy affiliated with?
Dr. Percy is affiliated with Cooley Dickinson Hospital. Dmand AI links Dr. Percy to 1 more hospital.
What medical group is Dr. Thomas Britton Percy part of?
Dr. Percy is linked to Baystate Medical Practices. Dmand AI links Dr. Percy to 3 more medical groups.
Does Dr. Thomas Britton Percy accept Medicare?
Yes. CMS data shows Dr. Percy billed Medicare for 181 services in 2024, and Dr. Percy accepts Medicare assignment.
Does Dr. Thomas Britton Percy offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Percy as offering telehealth services.
How many Medicare patients does Dr. Thomas Britton Percy see?
CMS counts 120 Medicare patients who saw Dr. Percy in 2024, with an average age of 78.
Show 5 more questionsShow fewer questions
What services does Dr. Thomas Britton Percy bill to Medicare?
In 2024, Dr. Percy's most billed Medicare services were hospital inpatient care (99233), care management and other visits (99442) and office visit, established patient (99215).
Where did Dr. Thomas Britton Percy go to medical school?
Dr. Percy graduated from University of Cincinnati College of Medicine in 1993.
What drugs does Dr. Thomas Britton Percy prescribe most?
In 2024 Medicare Part D data, Dr. Percy's most prescribed drugs by claims were Donepezil HCl, Rivastigmine and Sertraline HCl.
Has Dr. Thomas Britton Percy received payments from drug or device companies?
CMS Open Payments shows $48 in general payments to Dr. Percy from 2 companies from 2016 to 2016. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Thomas Britton Percy been practicing?
Dr. Percy graduated from medical school in 1993, 33 years ago.
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