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DR. JANET C LARSON M.D.
NPI 1831159326
Internal Medicine in Boston, MA

Active since March 27, 2006PECOS EnrolledAccepts Medicare Assignment
801 MASSACHUSETTS AVE, CROSSTOWN 2, BOSTON, MA 02118(617) 414-7399(617) 414-4676 Get Directions Write a Review

NPPES record last updated: April 3, 2024. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Janet C Larson M.d. NPPES

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

DR. JANET C LARSON M.D. (NPI 1831159326) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (220603) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS and is a graduate of Boston University School Of Medicine (1998).

NPPES Registry Identity

NPI1831159326
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. JANET C LARSONCredential: M.D.
Location Address801 MASSACHUSETTS AVE, CROSSTOWN 2Boston, MA 02118
Mailing Address960 Massachusetts Ave, Fl 2Boston, MA 02118
Phone(617) 414-7399
Fax(617) 414-4676
Sole ProprietorNo
Medical School CMSBoston University School Of MedicineGraduated 1998
Enumeration DateMarch 27, 2006
Last NPPES UpdateApril 3, 2024
NPPES CertifiedApril 3, 2024
✔ NPI 1831159326 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 220603
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 ListedHospitalistTaxonomy 208M00000X · License 220603 (MA)
801 MASSACHUSETTS AVE, Boston, MA 02118
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Other Names 1

Former Name (1)Dr. Janet Carlisle Hanousek M.d.

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Janet C Larson M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2769462399
PECOS Enrollment IDI20260507000896
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 02118 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 20

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

DR. FELICIA ELIZABETH PATCH MD
Internal Medicine
801 MASSACHUSETTS AVE, CROSSTOWN 2
BOSTON, MA 02118
Suffolk County (617) 414-4376
CORINA ELENA BEINER MARTINEZ
Student in an Organized Health Care Education/Training Program
801 MASSACHUSETTS AVE
BOSTON, MA 02118
Suffolk County (617) 414-5951
MAYERLIN MORLA UBIERA
Counselor (Mental Health)
801 MASSACHUSETTS AVE
BOSTON, MA 02118
Suffolk County (617) 651-2538
XANTHIA ALIX TUCKER MD
Internal Medicine
801 MASSACHUSETTS AVE, SUITE 5A, CROSSTOWN BLDG
BOSTON, MA 02118
Suffolk County (617) 414-5951
DR. JENNIFER K HUGHES M.D.
Internal Medicine (Hospice and Palliative Medicine)
801 MASSACHUSETTS AVE, CROSSTOWN 2
BOSTON, MA 02118
Suffolk County (617) 414-4376
LUCY CURELL
Community Health Worker
801 MASSACHUSETTS AVE
BOSTON, MA 02118
Suffolk County (617) 991-8264
AMOS WU
Internal Medicine
801 MASSACHUSETTS AVE, CROSSTOWN 2
BOSTON, MA 02118
Suffolk County (617) 414-7399
MS. ARCHANA VASUDEVAN DO
Internal Medicine
801 MASSACHUSETTS AVE, CROSSTOWN 2
BOSTON, MA 02118
Suffolk County (617) 414-7399

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 Janet Larson's NPI number?

The NPI number for Janet Larson is 1831159326. It was assigned to this individual provider in the NPPES registry on March 27, 2006. The provider is also known as Dr. Janet Carlisle Hanousek M.D..

Where is Janet Larson located?

Janet Larson practices at 801 Massachusetts Ave Crosstown 2, Boston, MA 02118. The listed phone number is (617) 414-7399.

What is Janet Larson's specialty?

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

Is Janet Larson enrolled in Medicare?

Yes. Janet Larson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Janet Larson was last updated on April 3, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.