Tomas Gerald Neilan, MD
Cardiovascular Disease Physician · Boston, MA
Tomas Gerald Neilan, MD is a cardiovascular disease physician with a practice address in Boston, Massachusetts, and NPI 1437285145, issued on Feb 26, 2007. Check the license (Massachusetts 234637, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Tomas Gerald Neilan
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 234637 MA
Self-reported in NPPES; status is on the state search - Practice location
- Massachusetts General Hospital, Boston, MA 02114
- Phone
- (617) 724-2700
- Enumerated
- Feb 26, 2007
- Record last updated
- Jan 3, 2026
- Medicaid ID
- 110088962A MA
- Medicare enrollment
- Enrolled (PECOS I20081031000323); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,080 in Massachusetts → Look up another NPI →
Also registered at Massachusetts General Hospital
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Tomas Gerald Neilan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 234637Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
1,892 Medicare Part D claims for 274 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Atorvastatin Calcium301 claims
- Metoprolol Succinate248 claims
- Rosuvastatin Calcium162 claims
- Eliquis121 claims
- Ezetimibe104 claims
- Lisinopril100 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.
Industry payments in 2024: $15,499.75
9 payments; by number, the most common kind was consulting fee; the largest payer was E.R. Squibb & Sons, L.L.C. The 16,686 providers of this specialty with any payment received $3,819.56 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 2 group practices
- Massachusetts General Physicians Organization IncDanvers, MA
- The General Hospital CorporationBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tomas Gerald Neilan among 1,080 cardiovascular disease physician records in Massachusetts
Tomas Gerald Neilan, MD is one of 1,080 cardiovascular disease physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 55% of them.
- NPI issued2007 · 55% of these records are older, 36% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1996 · median 2001 among the 698 with a school on file
- Record last updated2026 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
476 cardiovascular disease physician records list a practice address in Boston
They are 476 of the 41,865 NPPES records with a practice address in Boston, and 1,080 cardiovascular disease physician records in Massachusetts.
All 1,080 in Massachusetts → Every provider in Boston → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Anjum Butte, MDBoston, MA 021141104807379
- William Carlson, MD PHDBoston, MA 021141669462180
- Michael Fifer, MDBoston, MA 021141730170630
- Edwin Heist, MD PHDBoston, MA 021141255313334
- Judy Hung, MDBoston, MA 021141003898461
- Calum Macrae, MDBoston, MA 021141467442665
- James McFarland, MDBoston, MA 021141497745798
- Theofanie Mela, MDBoston, MA 021141366423832
Common questions
What is Tomas Gerald Neilan, MD's NPI number?
Tomas Gerald Neilan, MD's National Provider Identifier (NPI) is 1437285145, issued on Feb 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Tomas Gerald Neilan, MD located?
The NPPES record lists a practice address at Massachusetts General Hospital, Boston, MA, 02114. Phone: (617) 724-2700. Providers update this record themselves, so call before visiting.
How can I verify Tomas Gerald Neilan, MD's license?
NPPES lists Massachusetts license number 234637, 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 Tomas Gerald Neilan, MD prescribe under Medicare Part D?
In 2024, Tomas Gerald Neilan, MD had 1,892 Medicare Part D claims for 274 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
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.