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Short Term Acute Care HospitalVoluntary Non-Profit - Private

Northern Westchester Hospital

Northwell Health · Mount Kisco, NY

400 East Main Street, Mount Kisco, NY 10549(914) 666-1200

5 of 5

CMS star rating

177

Beds

9,833

Inpatient discharges a year

$520.8M

Net patient revenue a year

39

In-network payers

Photo 1: Northern Westchester Hospital, CC BY-SA 4.0, via Wikimedia Commons · Photo 2: Public domain (USGS NAIP, CONUS), via USGS National Map / USDA NAIP

About this hospital

Northern Westchester Hospital is a 177-bed voluntary non-profit - private hospital in Mount Kisco, NY, affiliated with Northwell Health. Below you'll find publicly disclosed negotiated rates and facility details, including 39 in-network payers and 336 disclosed rate categories.

  • ACO participant
CCN
330162
NPI
1912992215
Health system
Northwell Health
Teaching
Teaching hospital
County
Westchester County
Metro area
New York-Newark-Jersey City, NY-NJ MSA
Medicare contractor
Jurisdiction K, National Government Services (13001)
In Medicare since
2014
Last CMS survey
2025

Prices for common services

The 24 services Northern Westchester Hospital most likely performs, ranked by likely volume and what it is paid. Each service names one insurer. * marks hidden insurer names; A, B and C rank the remaining rates from low to high and reset for each service.

Book a demo to see hidden insurer names, more payer rates, and hospital data, or start a free trial.

Childbirth · Inpatient

Vaginal delivery, hospital stay

MS-DRG 807

$12,925 - $24,233

from 4 insurers · median $20,917

Cigna$24,233
Insurer A*$12,925
Insurer B*$19,416
Insurer C*$22,418

CMS lists this service as CPT 59400, the obstetrician's global fee. The hospital bills the delivery stay as MS-DRG 807, so these are facility case rates.

Hospital reports neonatal nursery services to CMS

Childbirth · Inpatient

Cesarean delivery, hospital stay

MS-DRG 788

$18,891 - $34,462

from 4 insurers · median $26,913

Cigna$34,462
Insurer A*$18,891
Insurer B*$23,596
Insurer C*$30,229

CMS lists this service as CPT 59510, the obstetrician's global fee. The hospital bills the delivery stay as MS-DRG 788, so these are facility case rates.

Hospital reports neonatal nursery services to CMS

Gynecology

Hysteroscopy with sampling of the uterine lining

CPT 58558

$9,440 - $21,018

from 3 insurers · median $9,689

UnitedHealthcare$9,689
Insurer A*$9,440
Insurer B*$21,018
Medicare $3,655Nearby hospitals $3,990143% above nearby hospitals

53 Medicare claims in Level 4 Gynecologic Procedures (CMS 2024)

Medicine & Surgery · Inpatient

Spinal fusion except cervical without MCC

MS-DRG 460

$94,885 - $138,890

from 3 insurers · median $106,577

Aetna$106,577
Insurer A*$94,885
Insurer B*$138,890
Medicare $25,807Nearby hospitals $74,51143% above nearby hospitals

17 Medicare discharges for this DRG in CMS hospital data

How the insurers pay at Northern Westchester Hospital

Median rate as a percent of Medicare across the outpatient services above, and how many services sit above or below the same insurer's median at nearby hospitals. * marks hidden insurer names. These table labels track the same insurers across services; the labels on each service card reset.

InsurerServicesMedian % of MedicareAbove nearbyBelow nearby
Insurer A*24
600%
210
Insurer B*19
367%
79
Insurer C*23
273%
108
Insurer D*10
256%
24

How we chose these services: 8 appear in this hospital's own Medicare claims, 11 are common here based on CMS Medicare volume, and 5 are typical for the service lines it reports to CMS. Rates come from insurer and hospital price transparency files as of October 2026. Rates under a quarter of Medicare or over 20 times Medicare are left out as likely physician-fee rows or file errors. Book a demo to see all 300 CMS shoppable services for Northern Westchester Hospital, or start a free trial.

Insurance Accepted

Acceptance varies by plan and service. Confirm coverage with your insurer or the hospital's billing department.

Medicare
Aetna
BCBS
Cigna
United Healthcare (incl Optum, Rocky Mountain, Health Plan of Nevada, Sierra Health)
Ameri HealthAspirus Health PlanAvera Health PlansBanner HealthCenteneEMI Health

More about this hospital

  • Quality

    5 of 5 stars

    • 196 min in the ER before going home (US median 148)
    • Medicare readmissions penalty (-0.35%)
    See quality ratings
  • Doctors and services

    Accredited by The Joint Commission

    • Teaching hospital
    • 36 services
    • 721 affiliated clinicians
    See doctors and services
  • Finances

    $520.8M net patient revenue

    • Operating margin on patient care -8.7%
    • $23M unreimbursed and uncompensated care
    • $43.2M net income
    See finances
  • Ownership and leadership

    Owned by Northwell Health Inc

    • Private (not for profit)
    • Michele L Cusack, chief executive
    See ownership and leadership

Tax IDs and NPIs insurers list

The employer identification numbers (EINs) health plans and networks list for Northern Westchester Hospital in the in-network rate files they publish, with the organization NPIs billed under each.

Tax ID (EIN)Plans and networks listing itOrganization NPIs
13-1740118Northern Westchester Hospital54Aetna, Cigna, United Healthcare (incl Optum, Rocky Mountain, Health Plan of Nevada, Sierra Health), Allied Benefit Systems, Ameri Health and 49 more1912992215 Northern Westchester Hospital Association1194982223 Northern Westchester Hospital Association1598923633 Northern Westchester Hospital Assocand 12 more

Source: PayerPrice analysis of insurers' Transparency in Coverage in-network files. An EIN can cover several hospitals and clinics in a health system, and insurers sometimes list other organizations' NPIs under it.

Location

400 East Main Street, Mount Kisco, NY 10549

(914) 666-1200

Get directions

Frequently asked questions

About Northern Westchester Hospital's rates and hospital price transparency.

How much does a CT scan cost at Northern Westchester Hospital?

For CT abdomen and pelvis with contrast (CPT 74177), published negotiated rates at Northern Westchester Hospital range from $649 to $4,836 across 3 insurers. Aetna's rate is $4,836. The median at nearby comparable hospitals is $865. What a patient pays depends on their plan's deductible, coinsurance and network status.

How much does a colonoscopy cost at Northern Westchester Hospital?

For Colonoscopy with biopsy (CPT 45380), published negotiated rates at Northern Westchester Hospital range from $3,343 to $9,633 across 3 insurers. Blue Cross Blue Shield's rate is $3,343. The median at nearby comparable hospitals is $3,969. What a patient pays depends on their plan's deductible, coinsurance and network status.

How much does giving birth cost at Northern Westchester Hospital?

For Vaginal delivery, hospital stay (MS-DRG 807), published negotiated rates at Northern Westchester Hospital range from $12,925 to $24,233 across 4 insurers. Cigna's rate is $24,233. What a patient pays depends on their plan's deductible, coinsurance and network status.

How much does a mammogram cost at Northern Westchester Hospital?

For Screening mammography, bilateral (CPT 77067), published negotiated rates at Northern Westchester Hospital range from $228 to $758 across 3 insurers. Cigna's rate is $301. The median at nearby comparable hospitals is $393. What a patient pays depends on their plan's deductible, coinsurance and network status.

How much does hip or knee replacement cost at Northern Westchester Hospital?

For Major lower-extremity joint replacement without MCC (MS-DRG 470), published negotiated rates at Northern Westchester Hospital range from $56,784 to $69,330 across 4 insurers. Aetna's rate is $67,093. The median at nearby comparable hospitals is $44,176. What a patient pays depends on their plan's deductible, coinsurance and network status.

What is Northern Westchester Hospital's CMS star rating?

Northern Westchester Hospital has a CMS overall hospital star rating of 5 out of 5 on Medicare Care Compare (CMS data released 2026-08-13). That is the top rating, shared by 12% of US hospitals.

Is Northern Westchester Hospital a teaching hospital?

Yes. CMS counts 0.17 Medicare-funded residents per bed at Northern Westchester Hospital for fiscal year 2027, so it is a teaching hospital.

Does Medicare penalize Northern Westchester Hospital for readmissions?

Yes. Under the Hospital Readmissions Reduction Program, Medicare cuts Northern Westchester Hospital's base inpatient payments by an estimated 0.35% in fiscal year 2027 for more readmissions than expected.

What are the most common Medicare inpatient stays at Northern Westchester Hospital?

In 2024, the most common were septicemia or severe sepsis without mv >96 hours with mcc (254 discharges), heart failure and shock with mcc (118 discharges), septicemia or severe sepsis without mv >96 hours without mcc (81 discharges).

What is Northern Westchester Hospital's case mix index?

Northern Westchester Hospital's Medicare case mix index is 1.80 for fiscal year 2027, higher than 62% of hospitals paid under the inpatient prospective payment system.

For hospital finance and compliance teams

Running price transparency at a hospital like this one?

The data on this page comes from the files hospitals and payers publish. We help hospitals publish theirs correctly, and take a fresh look at their chargemaster.

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Publish a CMS-compliant machine-readable file

We turn your chargemaster and payer contracts into the CMS template file, then keep it current as rates change.

CMS v3 example: standard_charge_information[0]
{
  "description": "MRI of brain (no contrast)",
  "code_information": [
    { "code": "611", "type": "RC" },
    { "code": "70551", "type": "CPT" }
  ],
  "standard_charges": [{
    "setting": "outpatient",
    "minimum": 250,
    "maximum": 400,
    "gross_charge": 1200,
    "discounted_cash": 1080,
    "payers_information": [
      {
        "payer_name": "Platform Health Insurance",
        "plan_name": "PPO",
        "methodology": "fee schedule",
        "standard_charge_dollar": 400
      },
      {
        "payer_name": "Region Health Insurance",
        "plan_name": "HMO",
        "methodology": "fee schedule",
        "standard_charge_dollar": 250
      }
    ]
  }]
}
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  • cms-hpt.txt file and homepage footer link
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Your chargemaster sets the gross charge on every claim, and many payer contracts base payment on it through percent-of-charge, lesser-of and stop-loss terms. We audit it line by line and show how your charges and negotiated rates compare with peer hospitals before your next negotiation.

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  • Missing, duplicate and outdated charge lines identified
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