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DR. CASSIE A KOSAREK MD
NPI 1114504099
Psychiatry & Neurology - Psychiatry in Hanover, NH

Active since March 26, 2021Opted out of Medicare · through Jan 7, 2028
3 LEBANON ST STE 39, HANOVER, NH 03755(802) 526-4810 Get Directions Write a Review

NPPES record last updated: March 4, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 4, 2026, Jul 9, 2025, Mar 26, 2021 (3 updates tracked since 2021).

About Dr. Cassie A Kosarek Md NPPES

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

DR. CASSIE A KOSAREK MD (NPI 1114504099) is an individual psychiatry provider in Hanover, New Hampshire, licensed in New Hampshire (35234) and active in the NPI registry since March 2021. She has opted out of Medicare through January 7, 2028.

NPPES Registry Identity

NPI1114504099
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameDR. CASSIE A KOSAREKCredential: MD
Location Address3 LEBANON ST STE 39Hanover, NH 03755-2158
Mailing Address3 Lebanon St Ste 39Hanover, NH 03755-2196 · (802) 526-4810 · Fax (603) 448-0661
Phone(802) 526-4810
Sole ProprietorNo
Enumeration DateMarch 26, 2021
Last NPPES UpdateMarch 4, 20263 updates tracked since enumeration
NPPES CertifiedMarch 4, 2026
✔ NPI 1114504099 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 NH · 35234✔ Licensed in VT · 042.0018707
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.
3 LEBANON ST STE 39, Hanover, NH 03755
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Cassie A Kosarek Md has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from January 7, 2026 through January 7, 2028.

Opt-Out Effective DateJanuary 7, 2026
Opt-Out In Effect ThroughJanuary 7, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 03755 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
$174.26 typical visit price
range $57.75 – $174.26
Typical copayment $43.56 (range $14.43 – $43.56)
Most-billed visit code 99205
Established Patient
$71.85 typical visit price
range $18.70 – $142.15
Typical copayment $17.96 (range $4.67 – $35.53)
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

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

UPPER VALLEY PSYCHIATRY P.L.L.C.
Clinic/Center (Health Service)
3 LEBANON ST STE 39
HANOVER, NH 03755
Grafton County (802) 526-4810

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 Cassie Kosarek's NPI number?

The NPI number for Cassie Kosarek is 1114504099. It was assigned to this individual provider in the NPPES registry on March 26, 2021.

Where is Cassie Kosarek located?

Cassie Kosarek practices at 3 Lebanon St Ste 39, Hanover, NH 03755. The listed phone number is (802) 526-4810.

What is Cassie Kosarek's specialty?

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

Is Cassie Kosarek enrolled in Medicare?

No. Cassie Kosarek has opted out of Medicare through January 7, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

When was this NPI record last updated?

The NPPES record for Cassie Kosarek was last updated on March 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.