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MR. SIMON FORBES DESJARDINS M.D.
NPI 1821387580
Psychiatry & Neurology - Psychiatry in Belmont, MA

Active since April 04, 2011PECOS Enrolled
115 MILL ST, BELMONT, MA 02478(617) 855-3141 Get Directions Write a Review

NPPES record last updated: October 22, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 28, 2021, Apr 23, 2021, Feb 6, 2020 and 3 more (6 updates tracked since 2015).

About Mr. Simon Forbes Desjardins M.d. NPPES

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

MR. SIMON FORBES DESJARDINS M.D. (NPI 1821387580) is an individual psychiatry provider in Belmont, Massachusetts, licensed in Massachusetts (281954) and active in the NPI registry since April 2011. He is enrolled in Medicare PECOS and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1821387580
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameMR. SIMON FORBES DESJARDINSCredential: M.D.
Location Address115 MILL STBelmont, MA 02478-1064
Mailing Address131 Coolidge Ave Apt 521Watertown, MA 02472-2800 · (401) 400-0636
Phone(617) 855-3141
Sole ProprietorNo
Enumeration DateApril 4, 2011
Last NPPES UpdateOctober 22, 20256 updates tracked since enumeration
NPPES CertifiedOctober 22, 2025
✔ NPI 1821387580 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
Licenses✔ Licensed in MA · 281954✔ Licensed in CA · A143651✔ Licensed in NY · 268564✔ Licensed in RI · 16019
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
115 MILL ST, Belmont, MA 02478
Open in Google Maps ↗

Secondary Practice Locations 3

Location 1211 Park StAttleboro, MA 02703-3143 · Phone (508) 236-7032 · Fax (508) 236-8903
Location 229 Elbow StProvidence, RI 02903-4620 · Phone (401) 424-5200
Location 3131 Coolidge Ave Apt 521Watertown, MA 02472-2800 · Phone (401) 400-0636

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mr. Simon Forbes Desjardins 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02478 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
$189.86 typical visit price
range $63.72 – $189.86
Typical copayment $47.46 (range $15.93 – $47.46)
Most-billed visit code 99205
Established Patient
$78.84 typical visit price
range $21.07 – $155.29
Typical copayment $19.71 (range $5.26 – $38.82)
Most-billed visit code 99213
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 20

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

KATY TARELLA LICSW
Social Worker (Clinical)
115 MILL ST, MAILSTOP 137
BELMONT, MA 02478
Middlesex County (617) 855-4178
EVAN D MURRAY MD
Psychiatry & Neurology (Neurology)
115 MILL ST, MCLEAN HOSPITAL
BELMONT, MA 02478
Middlesex County (617) 855-2354
MIQVEH STEINHART
Social Worker (Clinical)
115 MILL ST
BELMONT, MA 02478
Middlesex County (617) 855-3118
DANIELLE PACE PSYD
Psychologist (Clinical)
115 MILL ST
BELMONT, MA 02478
Middlesex County (617) 855-2000
DR. MARNI JOY CHANOFF MD
Psychiatry & Neurology (Psychiatry)
115 MILL ST
BELMONT, MA 02478
Middlesex County (617) 855-3937
DR. NANCY ANN HUXLEY PH.D.
Psychologist (Clinical)
115 MILL ST
BELMONT, MA 02478
Middlesex County (617) 855-3645
JOAN MARTHA COTTLER LICSW
Social Worker (Clinical)
115 MILL ST
BELMONT, MA 02478
Middlesex County (617) 855-3623
PROF. BRUCE MICHAEL COHEN M.D., PH.D.
Psychiatry & Neurology (Psychiatry)
115 MILL ST
BELMONT, MA 02478
Middlesex County (617) 855-3227

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 Simon Desjardins's NPI number?

The NPI number for Simon Desjardins is 1821387580. It was assigned to this individual provider in the NPPES registry on April 4, 2011.

Where is Simon Desjardins located?

Simon Desjardins practices at 115 Mill St, Belmont, MA 02478. The listed phone number is (617) 855-3141.

What is Simon Desjardins's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Simon Desjardins enrolled in Medicare?

Yes. Simon Desjardins is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Simon Desjardins was last updated on October 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.