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DR. ALFRED W. HEINSER MD
NPI 1871570218
Internal Medicine in Groton, MA

Active since December 28, 2005PECOS Enrolled
100 BOSTON RD, GROTON, MA 01450(978) 448-4300(978) 448-4040 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Alfred W. Heinser Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ALFRED W. HEINSER MD (NPI 1871570218) is an individual internal medicine provider in Groton, Massachusetts, licensed in Massachusetts (208727) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1871570218
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. ALFRED W. HEINSERCredential: MD
Location Address100 BOSTON RDGroton, MA 01450-1860
Mailing AddressPo Box 369Groton, MA 01450-0369 · (978) 448-4300 · Fax (978) 448-4040
Phone(978) 448-4300
Fax(978) 448-4040
Sole ProprietorNo
Enumeration DateDecember 28, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1871570218 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 208727
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
100 BOSTON RD, Groton, MA 01450
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Other Identifiers 1

Medicaid2012201MA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Alfred W. Heinser Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Alfred Heinser reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Emerson Practice Associates, Inc.
14 mi
Internal Medicine
133 OLD ROAD TO NINE ACRE CORNER
Concord, MA 01742
  • Reassigned Medicare billing, Massachusetts enrollment
  • 451 clinicians in this Medicare group
NPI 1508020199 (978) 287-3022

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
234 services234 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
227 services181 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
175 services136 patients
Injection of drug or substance under skin or into muscle 96372
This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
51 services14 patients
Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg J3420
This is a procedure where a small dose of Vitamin B-12, also known as Cyanocobalamin, is injected into your body. This vitamin is essential for nerve function and the production of red blood cells. It's often used to treat vitamin B-12 deficiency.
50 services15 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
32 services32 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01450 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$144.11 typical visit price
range $63.72 – $189.86
Typical copayment $36.02 (range $15.93 – $47.46)
Most-billed visit code 99204
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Atrial Fibrillation and Atrial Flutter: Chronic Anticoagulation Therapy
Percentage of patients aged 18 years and older with nonvalvular atrial fibrillation (AF) or atrial flutter who were prescribed warfarin OR another FDA- approved anticoagulant drug for the prevention of thromboembolism during the measurement period
77%48 patients3/55-star benchmark: 100%
Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
8%310 patients1/55-star benchmark: 100%
Coronary Artery Disease (CAD): Antiplatelet Therapy
Percentage of patients aged 18 years and older with a diagnosis of coronary artery disease (CAD) seen within a 12 month period who were prescribed aspirin or clopidogrel
95%121 patients4/55-star benchmark: 100%
Diabetes: Medical Attention for Nephropathy
The percentage of patients 18-75 years of age with diabetes who had a nephropathy screening test or evidence of nephropathy during the measurement period
74%125 patients3/55-star benchmark: 100%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
95%1,546 patients4/55-star benchmark: 100%
e-Prescribing
At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.
69%4,357 patients3/55-star benchmark: 100%
Ischemic Vascular Disease (IVD): Use of Aspirin or Another Antiplatelet
Percentage of patients 18 years of age and older who were diagnosed with acute myocardial infarction (AMI), coronary artery bypass graft (CABG) or percutaneous coronary interventions (PCI) in the 12 months prior to the measurement period, or who had an active…
91%117 patients4/55-star benchmark: 100%
Medication Reconciliation
The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.
97%175 patients4/55-star benchmark: 100%
Patient-Specific Education
The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.
1%2,001 patients1/55-star benchmark: 100%
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
95%966 patients4/55-star benchmark: 100%
Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention
Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user
61%33 patients3/55-star benchmark: 100%
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
71%2,001 patients3/55-star benchmark: 100%
Secure Messaging
For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…
12%2,001 patients1/55-star benchmark: 79%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 5

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
6 suppliers12 claims31 services$5.76 avg. paid by Medicare
Tubing with integrated heating element for use with positive airway pressure device A4604
DME-Other DME · category DE001N
3 suppliers15 claims15 services$33.76 avg. paid by Medicare
Full face mask used with positive airway pressure device, each A7030
DME-Other DME · category DE001N
2 suppliers16 claims16 services$75.40 avg. paid by Medicare
Face mask interface, replacement for full face mask, each A7031
DME-Other DME · category DE001N
3 suppliers16 claims30 services$28.29 avg. paid by Medicare
Filter, disposable, used with positive airway pressure device A7038
DME-Other DME · category DE001N
4 suppliers19 claims105 services$1.92 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 12

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SUSAN JENSEN NP
Nurse Practitioner (Pediatrics)
100 BOSTON RD, SUITE F
GROTON, MA 01450
Middlesex County (978) 577-0437
ASHLEY AREN SMITH-BOUTIN NP, R.N.
Nurse Practitioner (Primary Care)
100 BOSTON RD
GROTON, MA 01450
Middlesex County (978) 448-4300
GROTON MEDICAL ASSOCIATES
Nurse Practitioner
100 BOSTON RD, SUITE E
GROTON, MA 01450
Middlesex County (978) 448-4300
DANA KATTER OLIVER N.P.
Nurse Practitioner (Pediatrics)
100 BOSTON RD, SUITE F
GROTON, MA 01450
Middlesex County (978) 577-0437
MARK FRANCIS MD
Pediatrics
100 BOSTON RD, SUITE F
GROTON, MA 01450
Middlesex County (978) 577-0437
GROTON MEDICAL ASSOCIATES, LLC
Internal Medicine
100 BOSTON RD
GROTON, MA 01450
Middlesex County (978) 448-4300
DR. THOMAS A GOODMAN MD
Internal Medicine (Rheumatology)
100 BOSTON RD
GROTON, MA 01450
Middlesex County (978) 448-4300
BEVERLY HARRIS NP
Nurse Practitioner (Adult Health)
100 BOSTON RD, SUITE E
GROTON, MA 01450
Middlesex County (978) 448-4300

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Alfred Heinser's NPI number?

The NPI number for Alfred Heinser is 1871570218. It was assigned to this individual provider in the NPPES registry on December 28, 2005.

Where is Alfred Heinser located?

Alfred Heinser practices at 100 Boston Rd, Groton, MA 01450. The listed phone number is (978) 448-4300.

What is Alfred Heinser's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Alfred Heinser enrolled in Medicare?

Yes. Alfred Heinser is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alfred Heinser's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alfred Heinser reassigns Medicare benefits to Emerson Practice Associates, Inc. (Concord, MA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alfred Heinser's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Alfred Heinser was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.