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DR. JOSEPH MARCEL-SAINT-LOUIS DEMERTINE M.D.
NPI 1427007822
Internal Medicine in Boston, MA

Active since May 10, 2006PECOS Enrolled
581 BOYLSTON ST, 800, BOSTON, MA 02116(617) 247-1400(617) 247-1411 Get Directions Write a Review

NPPES record last updated: February 22, 2017. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Joseph Marcel-saint-louis Demertine M.d. NPPES

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

DR. JOSEPH MARCEL-SAINT-LOUIS DEMERTINE M.D. (NPI 1427007822) is an individual internal medicine provider in Boston, Massachusetts, licensed in New York (233842) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1427007822
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. JOSEPH MARCEL-SAINT-LOUIS DEMERTINECredential: M.D.
Location Address581 BOYLSTON ST, 800Boston, MA 02116-3608
Mailing Address3 Arlington StBoston, MA 02116-3415 · (617) 247-1400 · Fax (617) 247-1411
Phone(617) 247-1400
Fax(617) 247-1411
Sole ProprietorYes
Enumeration DateMay 10, 2006
Last NPPES UpdateFebruary 22, 2017
✔ NPI 1427007822 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 7

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in NY · 233842
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.
Also ListedEmergency Medicine · Emergency Medical ServicesTaxonomy 207PE0004X · License 76898 (MA)
Also ListedFamily MedicineTaxonomy 207Q00000X · License 76898 (MA)
Also ListedFamily Medicine · Geriatric MedicineTaxonomy 207QG0300X · License 76898 (MA)
Also ListedPreventive Medicine · Public Health & General Preventive MedicineTaxonomy 2083P0901X · License 76898 (MA)
Also ListedGeneral PracticeTaxonomy 208D00000X · License 76898 (MA)
Also ListedHospitalistTaxonomy 208M00000X · License 76898 (MA)
581 BOYLSTON ST, Boston, MA 02116
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Other Names 1

Other Name (5)Dr. Joseph Herold Marcel-st-louis Demertine M.d.

Other Identifiers 3

Medicare ID-Type UnspecifiedA30300MA
Medicaid3203808MA
Medicare UPINE76305MA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Joseph Marcel-saint-louis Demertine M.d. 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 Joseph Marcel-saint-louis Demertine reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Hri Hospital, Inc
2.3 mi
Psychiatric Hospital
227 BABCOCK ST
Brookline, MA 02446
  • Reassigned Medicare billing, Massachusetts enrollment
  • 23 clinicians in this Medicare group
NPI 1518938174 (617) 731-3200

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02116 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.

Other Providers at the Same Location NPPES 16

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

ANN P LOVETT LICSW
Social Worker (Clinical)
581 BOYLSTON ST, SUITE 202D
BOSTON, MA 02116
Suffolk County (781) 979-2365
DONALD CRAIG SCHIERMER MD
Family Medicine
581 BOYLSTON ST, SUITE 800
BOSTON, MA 02116
Suffolk County (617) 921-9770
MS. KERRY SHEILA HENNESSY LICSW
Social Worker (Clinical)
581 BOYLSTON ST
BOSTON, MA 02116
Suffolk County (617) 645-8175
ANASTASIA HALL M.S., L.AC.
Acupuncturist
581 BOYLSTON ST, SUITE 302
BOSTON, MA 02116
Suffolk County (347) 675-8182
HEALTHY SOLES
Clinic/Center (Physical Therapy)
581 BOYLSTON ST, SUITE 504A
BOSTON, MA 02116
Suffolk County (617) 869-9986
KAREN GRIMES LMHC
Counselor (Mental Health)
581 BOYLSTON ST, SUITE 802C
BOSTON, MA 02116
Suffolk County (617) 840-3904
G & D SMILES
Dentist (General Practice)
581 BOYLSTON ST, SUITE 401
BOSTON, MA 02116
Suffolk County (617) 353-1500
COURTNEY SHANAHAN SCHARNECK LMT
Massage Therapist
581 BOYLSTON ST, SUITE 302
BOSTON, MA 02116
Suffolk County (617) 869-2781

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 Joseph Marcel-saint-louis Demertine's NPI number?

The NPI number for Joseph Marcel-saint-louis Demertine is 1427007822. It was assigned to this individual provider in the NPPES registry on May 10, 2006. The provider is also known as Dr. Joseph Herold Marcel-St-Louis Demertine M.D..

Where is Joseph Marcel-saint-louis Demertine located?

Joseph Marcel-saint-louis Demertine practices at 581 Boylston St 800, Boston, MA 02116. The listed phone number is (617) 247-1400.

What is Joseph Marcel-saint-louis Demertine's specialty?

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

Is Joseph Marcel-saint-louis Demertine enrolled in Medicare?

Yes. Joseph Marcel-saint-louis Demertine is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Joseph Marcel-saint-louis Demertine's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joseph Marcel-saint-louis Demertine reassigns Medicare benefits to Hri Hospital, Inc (Brookline, 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 Joseph Marcel-saint-louis Demertine'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 Joseph Marcel-saint-louis Demertine was last updated on February 22, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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.