Alfred W. Heinser, MD
Internal Medicine Physician · Groton, MA
Alfred W. Heinser, MD is an internal medicine physician with a practice address in Groton, Massachusetts, and NPI 1871570218, issued on Dec 28, 2005. Check the license (Massachusetts 208727, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Alfred W. Heinser
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 208727 MA
Self-reported in NPPES; status is on the state search - Practice location
- 100 Boston RD, Groton, MA 01450
- Phone
- (978) 448-4300
- Enumerated
- Dec 28, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (978) 448-4040
- Medicaid ID
- 2012201 MA
- Medicare enrollment
- Enrolled (PECOS I20051128000620); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 1999
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 100 Boston RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alfred W. Heinser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 208727Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,387 Medicare Part D claims for 288 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium183 claims
- Amlodipine Besylate118 claims
- Lisinopril96 claims
- Rosuvastatin Calcium96 claims
- Losartan Potassium75 claims
- Metformin Hcl62 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: $2,850.17
118 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Emerson Practice Associates, IncGroton, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alfred W. Heinser among 6,825 internal medicine physician records in Massachusetts
Alfred W. Heinser, MD is one of 6,825 internal medicine 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1999 · median 2004 among the 4,103 with a school on file
- Record last updated2026 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 internal medicine physician records list a practice address in Groton
They are 4 of the 140 NPPES records with a practice address in Groton, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Groton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Vandana Sahay, MDGroton, MA 014501881683068
- Alla Sarkisyan, MDGroton, MA 014501326037508
- Hilde Westvik, MDGroton, MA 014501235368242
- Maria Del Carmen Al-Homsi, MDHarvard, MA 014511376521070
- Robert Coit, M.D.Harvard, MA 014511235250465
- Glenn Allison, M.D.Leominster, MA 014531497745848
- Kimberly Ebb, MDLeominster, MA 014531790777589
- Jyoti Nagarkar, MDLeominster, MA 014531013903210
Common questions
What is Alfred W. Heinser, MD's NPI number?
Alfred W. Heinser, MD's National Provider Identifier (NPI) is 1871570218, issued on Dec 28, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Alfred W. Heinser, MD located?
The NPPES record lists a practice address at 100 Boston RD, Groton, MA, 01450. Phone: (978) 448-4300. Providers update this record themselves, so call before visiting.
How can I verify Alfred W. Heinser, MD's license?
NPPES lists Massachusetts license number 208727, 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 Alfred W. Heinser, MD prescribe under Medicare Part D?
In 2024, Alfred W. Heinser, MD had 1,387 Medicare Part D claims for 288 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.