Donald Barry Boyd, M.D.
Hematology & Oncology Physician · Greenwich, CT
Donald Barry Boyd, M.D. is a hematology & oncology physician with a practice address in Greenwich, Connecticut, and NPI 1396826376, issued on Oct 18, 2006. Check the license (Connecticut 27275, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Donald Barry Boyd
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 27275 CT
Self-reported in NPPES; status is on the state search - Practice location
- 15 Valley Dr, Greenwich, CT 06831
- Phone
- (203) 869-2111
- Enumerated
- Oct 18, 2006
- Record last updated
- Feb 9, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (203) 869-2203
- Medicare enrollment
- Enrolled (PECOS I20040225000053); accepts Medicare assignment
- Medical or professional school
- Js Weill Medical College, Cornell University, 1979
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 198 in Connecticut → Look up another NPI →
Also registered at 15 Valley Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Esther Chen-Karsdon, L.AC.Acupuncturist1275607699
- Sandra Eagle, LCSWClinical Social Worker1538344031
- Sarah Gamble, DOInternal Medicine Physician1265649073
- Yanping Li, L.A.C.Acupuncturist1437341658
Verify Donald Barry Boyd in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 27275Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,340 Medicare Part D claims for 195 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 44 claims were for opioids.
Most prescribed
- Anastrozole193 claims
- Eliquis76 claims
- Letrozole45 claims
- Exemestane37 claims
- Ibrance37 claims
- Tamoxifen Citrate33 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 MIPS final score for 2023 (Medicare payment program): 75.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $169.89
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Yale UniversityGreenwich, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Donald Barry Boyd among 198 hematology & oncology physician records in Connecticut
Donald Barry Boyd, M.D. is one of 198 hematology & oncology physician records with a practice address in Connecticut. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 52% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1979 · median 2003 among the 139 with a school on file
- Record last updated2010 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Connecticut
There are 198 hematology & oncology physician records in Connecticut.
All 198 in Connecticut → Every provider in Greenwich → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Julie Gold, M.D.Greenwich, CT 068301992739742
- Hervey Weitzman, MDFairfield, CT 068251124026406
- Paul Berard, MDFairfield, CT 068241699773804
- Sandhya Dhanjal, MDFairfield, CT 068241093924417
- Edward Duda, MDFairfield, CT 068241669469292
- Daniel Reuben, MDFairfield, CT 068241619979416
- Glen Reznikoff, M.D.Fairfield, CT 068241457348088
- Nicole Carreau, M.D.Norwalk, CT 068501104168962
Common questions
What is Donald Barry Boyd, M.D.'s NPI number?
Donald Barry Boyd, M.D.'s National Provider Identifier (NPI) is 1396826376, issued on Oct 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Donald Barry Boyd, M.D. located?
The NPPES record lists a practice address at 15 Valley Dr, Greenwich, CT, 06831. Phone: (203) 869-2111. Providers update this record themselves, so call before visiting.
How can I verify Donald Barry Boyd, M.D.'s license?
NPPES lists Connecticut license number 27275, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Donald Barry Boyd, M.D. prescribe under Medicare Part D?
In 2024, Donald Barry Boyd, M.D. had 1,340 Medicare Part D claims for 195 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Donald Barry Boyd, M.D.'s MIPS final score?
The 2023 MIPS final score is 75.2 of 100. 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.