Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JOEL STEPHEN FINKELSTEIN MD
NPI 1366426009
Internal Medicine - Endocrinology, Diabetes & Metabolism in Boston, MA

Q: What is Joel Finkelstein's NPI number?

The NPI number for Joel Finkelstein is 1366426009. It was assigned to this individual provider in the NPPES registry on December 6, 2005.

Q: What is Joel Finkelstein's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Q: When was this NPI record last updated?

The NPPES record for Joel Finkelstein was last updated on September 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 49 days 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.

Active since December 06, 2005

15 PARKMAN ST, WAC 730S, BOSTON, MA 02114(617) 726-8720(617) 724-2718 Get Directions Write a Review

NPPES record last updated: September 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 13, 2026, Jul 13, 2026, Sep 11, 2025 (3 updates tracked since 2025).

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About Dr. Joel Stephen Finkelstein Md NPPES

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

DR. JOEL STEPHEN FINKELSTEIN MD (NPI 1366426009) is an individual endocrinology, diabetes & metabolism provider in Boston, Massachusetts, licensed in Massachusetts (52162) and active in the NPI registry since December 2005.

NPPES Registry Identity

NPI1366426009

Entity TypeIndividualMale

Primary Taxonomy207RE0101X

Provider Legal NameDR. JOEL STEPHEN FINKELSTEINCredential: MD

Location Address15 PARKMAN ST, WAC 730SBoston, MA 02114-3117

Mailing AddressPo Box 9142, Mass General Physician OrganizationCharlestown, MA 02129-9142 · (617) 724-0287 · Fax (617) 726-2894

Phone(617) 726-8720

Fax(617) 724-2718

Sole ProprietorNo

Enumeration DateDecember 6, 2005

Last NPPES UpdateSeptember 13, 20263 updates tracked since enumeration

✔ NPI 1366426009 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians

Taxonomy Code207RE0101X

License✔ Licensed in MA · 52162

Definition

An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.

Also ListedInternal MedicineTaxonomy 207R00000X · License 52162 (MA)

15 PARKMAN ST, Boston, MA 02114

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Other Identifiers 3

Other724167MA · Tufts Health Plan

OtherJ03295MA · Bcbs Ma

Medicaid6174671MA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Joel Stephen Finkelstein Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignments

Medicare enrollment records show Joel Finkelstein reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The General Hospital Corporation

Same address

General Acute Care Hospital

55 FRUIT ST, BULFINCH 360
Boston, MA 02114

Reassigned Medicare billing, Massachusetts enrollment
6,234 clinicians in this Medicare group

NPI 1023049236 (617) 726-2000

Massachusetts General Physicians Organization Inc

Same address

Dermatology

55 FRUIT ST, BUL 2
Boston, MA 02114

Reassigned Medicare billing, Massachusetts enrollment
6,360 clinicians in this Medicare group

NPI 1801874573 (617) 724-0287

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 2

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.

Dxa bone density measurement of hip, pelvis, spine 77080

A DXA bone density measurement is a simple, quick, and non-invasive procedure that assesses the strength of your bones. This test uses X-rays to measure the amount of minerals, mainly calcium, in the hip, pelvis, and spine. It helps in early detection of osteoporosis or other bone diseases.

374 services371 patients

Dxa bone density measurement of forearm, finger, hand, or foot 77081

A DXA bone density measurement of the forearm, finger, hand, or foot is a non-invasive procedure that uses X-rays to measure the amount of calcium and other minerals in your bones. This test helps to assess the strength of your bones and your risk of fractures.

36 services36 patients

Other Providers at the Same Location NPPES 20

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

MRS. PATRICIA NOREEN FINNERAN NP-C

Nurse Practitioner (Adult Health)

15 PARKMAN ST, WAC 440
BOSTON, MA 02114

Suffolk County (617) 643-4709

MISS BRYANA CAREY PT, DPT

Physical Therapist

15 PARKMAN ST
BOSTON, MA 02114

Suffolk County (617) 643-4373

DR. WILLIAM ELLIS FALK MD

Psychiatry & Neurology (Geriatric Psychiatry)

15 PARKMAN ST, PSYCHIATRY OUTPATIENT DEPARTMENT WAC 812
BOSTON, MA 02114

Suffolk County (617) 726-5600

MRS. LILIAN DAYAN-CIMADORO PT,DPT,MS,NCS,CLT-LA

Physical Therapist (Neurology)

15 PARKMAN ST, ROOM 134
BOSTON, MA 02114

Suffolk County (617) 724-7484

MS. ANGELA MARY HAUBER DPT

Physical Therapist

15 PARKMAN ST
BOSTON, MA 02114

Suffolk County (617) 726-2962

JACKIE A MULGREW PT

Physical Therapist

15 PARKMAN ST, WACC 134
BOSTON, MA 02114

Suffolk County (617) 726-7487

MS. MARY S KNAB P.T.

Physical Therapist

15 PARKMAN ST
BOSTON, MA 02114

Suffolk County (617) 724-6398

DR. JAMES ELTON GROVES MD

Psychiatry & Neurology (Psychiatry)

15 PARKMAN ST, WAC 8 PSYCHIATRY OUTPATIENT DEPARTMENT
BOSTON, MA 02114

Suffolk County (617) 726-2714

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 Joel Finkelstein's NPI number?

The NPI number for Joel Finkelstein is 1366426009. It was assigned to this individual provider in the NPPES registry on December 6, 2005.

Where is Joel Finkelstein located?

Joel Finkelstein practices at 15 Parkman St Wac 730S, Boston, MA 02114. The listed phone number is (617) 726-8720.

What is Joel Finkelstein's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Joel Finkelstein enrolled in Medicare?

Yes. Joel Finkelstein is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Joel Finkelstein's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joel Finkelstein reassigns Medicare benefits to 2 organizations: The General Hospital Corporation (Boston, MA) and Massachusetts General Physicians Organization Inc (Boston, MA). Each 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 Joel Finkelstein'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 Joel Finkelstein was last updated on September 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 49 days 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.