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Short Term Acute Care HospitalVoluntary Non-Profit - Private

John T Mather Memorial Hospital

Northwell Health · Port Jefferson, NY

75 North Country Road, Port Jefferson, NY 11777(631) 473-1320

5 of 5

CMS star rating

249

Beds

9,805

Inpatient discharges a year

$462.1M

Net patient revenue a year

38

In-network payers

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

About this hospital

John T Mather Memorial Hospital is a 249-bed voluntary non-profit - private hospital in Port Jefferson, NY, affiliated with Northwell Health. Below you'll find publicly disclosed negotiated rates and facility details, including 38 in-network payers and 364 disclosed rate categories.

  • Helipad
CCN
330185
NPI
1093718728
Health system
Northwell Health
Teaching
Major teaching hospital
County
Suffolk County
Metro area
New York-Newark-Jersey City, NY-NJ MSA
Medicare contractor
Jurisdiction K, National Government Services (13001)
In Medicare since
1966
Last CMS survey
2024

Prices for common services

The 24 services John T Mather Memorial 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.

Medicine & Surgery · Inpatient

Spinal fusion except cervical without MCC

MS-DRG 460

$66,375 - $119,533

from 4 insurers · median $84,704

Aetna$119,533
Insurer A*$66,375
Insurer B*$74,523
Insurer C*$94,885
Medicare $35,129Nearby hospitals $73,31316% above nearby hospitals

53 Medicare discharges for this DRG in CMS hospital data

Medicine & Surgery

Laparoscopic cholecystectomy

CPT 47562

$7,220 - $24,922

from 3 insurers · median $16,953

Aetna$16,953
Insurer A*$7,220
Insurer B*$24,922
Medicare $6,248Nearby hospitals $5,335218% above nearby hospitals

168 Medicare claims in Level 1 Laparoscopy and Related Services (CMS 2024)

Medicine & Surgery · Inpatient

Major lower-extremity joint replacement without MCC

MS-DRG 470

$36,404 - $68,975

from 4 insurers · median $50,539

Aetna$68,975
Insurer A*$36,404
Insurer B*$37,834
Insurer C*$63,244
Medicare $16,485Nearby hospitals $40,64924% above nearby hospitals

22 Medicare discharges for this DRG in CMS hospital data

Gynecology

Hysteroscopy with sampling of the uterine lining

CPT 58558

$6,183 - $25,033

from 3 insurers · median $8,542

Blue Cross$25,033
Insurer A*$6,183
Insurer B*$8,542
Medicare $3,345Nearby hospitals $3,723129% above nearby hospitals

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

How the insurers pay at John T Mather Memorial 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
248%
126
Insurer B*10
215%
23
Insurer C*24
207%
195
Insurer D*24
187%
109

How we chose these services: 12 appear in this hospital's own Medicare claims, 10 are common here based on CMS Medicare volume, and 2 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 John T Mather Memorial 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 HealthCenteneComPsych

More about this hospital

  • Quality

    5 of 5 stars

    • 235 min in the ER before going home (US median 148)
    • Medicare readmissions penalty (-0.01%)
    See quality ratings
  • Doctors and services

    Accredited by The Joint Commission

    • Major teaching hospital
    • 37 services
    • 868 affiliated clinicians
    See doctors and services
  • Finances

    $462.1M net patient revenue

    • Operating margin on patient care -6.6%
    • $20.2M unreimbursed and uncompensated care
    • $17.1M net income
    See finances
  • Ownership and leadership

    Owned by Northwell Healthcare 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 John T Mather Memorial 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
11-1639818John T Mather Memorial Hospital55Aetna, Cigna, United Healthcare (incl Optum, Rocky Mountain, Health Plan of Nevada, Sierra Health), Allied Benefit Systems, AmeriBen and 50 more1093718728 John T. Mather Memorial Hospital1376642371 John T. Mather Memorial Hospital1932296316 John T. Mather Memorial Hospitaland 20 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

75 North Country Road, Port Jefferson, NY 11777

(631) 473-1320

Get directions

Frequently asked questions

About John T Mather Memorial Hospital's rates and hospital price transparency.

How much does an MRI cost at John T Mather Memorial Hospital?

For MRI brain before and after contrast (CPT 70553), published negotiated rates at John T Mather Memorial Hospital range from $437 to $854 across 4 insurers. Blue Cross Blue Shield's rate is $854. The median at nearby comparable hospitals is $806. What a patient pays depends on their plan's deductible, coinsurance and network status.

How much does a CT scan cost at John T Mather Memorial Hospital?

For CT abdomen and pelvis with contrast (CPT 74177), published negotiated rates at John T Mather Memorial Hospital range from $506 to $778 across 4 insurers. Cigna's rate is $704. The median at nearby comparable hospitals is $681. What a patient pays depends on their plan's deductible, coinsurance and network status.

How much does a colonoscopy cost at John T Mather Memorial Hospital?

For Colonoscopy with biopsy (CPT 45380), published negotiated rates at John T Mather Memorial Hospital range from $2,623 to $6,797 across 3 insurers. UnitedHealthcare's rate is $2,623. The median at nearby comparable hospitals is $3,797. What a patient pays depends on their plan's deductible, coinsurance and network status.

How much does a mammogram cost at John T Mather Memorial Hospital?

For Screening mammography, bilateral (CPT 77067), published negotiated rates at John T Mather Memorial Hospital range from $197 to $273 across 4 insurers. Cigna's rate is $273. The median at nearby comparable hospitals is $236. What a patient pays depends on their plan's deductible, coinsurance and network status.

How much does hip or knee replacement cost at John T Mather Memorial Hospital?

For Major lower-extremity joint replacement without MCC (MS-DRG 470), published negotiated rates at John T Mather Memorial Hospital range from $36,404 to $68,975 across 4 insurers. Aetna's rate is $68,975. The median at nearby comparable hospitals is $40,649. What a patient pays depends on their plan's deductible, coinsurance and network status.

What is John T Mather Memorial Hospital's CMS star rating?

John T Mather Memorial 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 John T Mather Memorial Hospital a teaching hospital?

Yes. CMS counts 0.54 Medicare-funded residents per bed at John T Mather Memorial Hospital for fiscal year 2027, so it is a major teaching hospital.

Does Medicare penalize John T Mather Memorial Hospital for readmissions?

Yes. Under the Hospital Readmissions Reduction Program, Medicare cuts John T Mather Memorial Hospital's base inpatient payments by an estimated 0.01% in fiscal year 2027 for more readmissions than expected.

What are the most common Medicare inpatient stays at John T Mather Memorial Hospital?

In 2024, the most common were septicemia or severe sepsis without mv >96 hours with mcc (472 discharges), heart failure and shock with mcc (193 discharges), respiratory infections and inflammations with mcc (163 discharges).

What is John T Mather Memorial Hospital's case mix index?

John T Mather Memorial Hospital's Medicare case mix index is 1.67 for fiscal year 2027, higher than 49% of hospitals paid under the inpatient prospective payment system.

For hospital finance and compliance teams

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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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