John T Mather Memorial Hospital of Port Jefferson: charges and Medicare payments

John T Mather Memorial Hospital of Port Jefferson reported 3,485 Medicare inpatient stays across 97 DRGs in 2024. Across them it charged 5.21 times what it was paid — among the higher ratios in New York, number 30 of 123 hospitals with at least 100 stays (state median 2.74×, national 4.15×). Its most frequent stay was DRG 871, Septicemia or Severe Sepsis without MV >96 Hours with MCC: 472 stays at an average charge of $120,309, 33% above the national average. It also billed 2,782 outpatient services, charging 7.96 times what Medicare paid.

1Medicare inpatient stays 3,485
2Charge ÷ paid, inpatient 5.21×
3Rank in NY (highest ratio = 1) 30 of 123
4CMS price-transparency actions 0

Average charge per stay at John T Mather Memorial Hospital of Port Jefferson, its 10 most frequent DRGs, bars to scale. Source: CMS DY2024.

Inpatient stays

For the 97 DRGs that can be compared with the national average, John T Mather Memorial Hospital of Port Jefferson charged more than the national average in 84 (87%). Payments follow Medicare's rates, so they usually vary far less than charges.

DRG	Stays	Avg charge	vs US	Avg paid
871 Septicemia or Severe Sepsis without MV >96 Hours with MCC	472	$120,309	+33%	$23,627
291 Heart Failure and Shock with MCC	193	$90,549	+61%	$15,066
177 Respiratory Infections and Inflammations with MCC	163	$82,977	+18%	$19,137
872 Septicemia or Severe Sepsis without MV >96 Hours without MCC	124	$76,010	+55%	$12,677
690 Kidney and Urinary Tract Infections without MCC	93	$59,665	+58%	$10,166
689 Kidney and Urinary Tract Infections with MCC	91	$81,577	+59%	$14,666
193 Simple Pneumonia and Pleurisy with MCC	88	$76,523	+28%	$14,073
378 Gastrointestinal Hemorrhage with CC	87	$73,341	+51%	$11,765
603 Cellulitis without MCC	80	$69,450	+86%	$12,629
698 Other Kidney and Urinary Tract Diagnoses with MCC	72	$91,358	+24%	$20,034
853 Infectious and Parasitic Diseases with O.R. Procedures with...	69	$297,933	+30%	$60,423
392 Esophagitis, Gastroenteritis and Miscellaneous Digestive...	62	$62,888	+57%	$9,453
683 Renal Failure with CC	61	$55,845	+37%	$10,525
552 Medical Back Problems without MCC	52	$56,855	+16%	$9,734
178 Respiratory Infections and Inflammations with CC	51	$68,777	+52%	$12,087
377 Gastrointestinal Hemorrhage with MCC	51	$124,395	+46%	$18,850
189 Pulmonary Edema and Respiratory Failure	47	$65,373	+14%	$14,482
682 Renal Failure with MCC	47	$84,040	+27%	$16,879
092 Other Disorders of Nervous System with CC	44	$60,699	+18%	$11,522
190 Chronic Obstructive Pulmonary Disease with MCC	42	$76,874	+52%	$13,181
470 Major Hip and Knee Joint Replacement or Reattachment of...	41	$79,797	-14%	$18,958
312 Syncope and Collapse	38	$60,486	+33%	$10,513
064 Intracranial Hemorrhage or Cerebral Infarction with MCC	36	$102,901	+3%	$21,414
322 Percutaneous Cardiovascular Procedures with Intraluminal...	36	$88,532	-23%	$18,925
287 Circulatory Disorders except AMI, with Cardiac...	35	$49,979	-22%	$10,344
309 Cardiac Arrhythmia and Conduction Disorders with CC	35	$57,837	+60%	$9,177
065 Intracranial Hemorrhage or Cerebral Infarction with CC or...	34	$78,349	+41%	$12,016
391 Esophagitis, Gastroenteritis and Miscellaneous Digestive...	33	$105,240	+72%	$17,710
640 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and...	33	$95,087	+58%	$18,481
948 Signs and Symptoms without MCC	33	$58,648	+54%	$10,277
280 Acute Myocardial Infarction, Discharged Alive with MCC	30	$103,773	+37%	$15,280
481 Hip and Femur Procedures except Major Joint with CC	30	$92,738	-8%	$20,366
641 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and...	30	$46,281	+25%	$8,667
329 Major Small and Large Bowel Procedures with MCC	28	$213,997	0%	$57,190
460 Spinal Fusion except Cervical without MCC	28	$156,251	-8%	$41,587
308 Cardiac Arrhythmia and Conduction Disorders with MCC	25	$80,805	+43%	$14,387
638 Diabetes with CC	25	$59,951	+44%	$15,898
194 Simple Pneumonia and Pleurisy with CC	24	$48,235	+26%	$11,613
389 Gastrointestinal Obstruction with CC	24	$66,666	+71%	$10,357
418 Laparoscopic Cholecystectomy without C.D.E. with CC	24	$113,573	+22%	$18,461
101 Seizures without MCC	23	$69,446	+42%	$10,529
563 Fracture, Sprain, Strain and Dislocation except Femur, Hip,...	23	$52,144	+22%	$9,492
644 Endocrine Disorders with CC	22	$60,959	+27%	$11,280
281 Acute Myocardial Infarction, Discharged Alive with CC	21	$61,902	+23%	$11,677
637 Diabetes with MCC	21	$86,442	+30%	$17,269
091 Other Disorders of Nervous System with MCC	20	$83,371	+1%	$17,988
208 Respiratory System Diagnosis with Ventilator Support <=96...	20	$157,509	+16%	$28,211
314 Other Circulatory System Diagnoses with MCC	20	$103,864	+10%	$21,369
330 Major Small and Large Bowel Procedures with CC	20	$136,541	+15%	$26,659
472 Cervical Spinal Fusion with CC	20	$150,929	+6%	$35,145
699 Other Kidney and Urinary Tract Diagnoses with CC	20	$66,195	+39%	$10,696
057 Degenerative Nervous System Disorders without MCC	19	$57,623	+2%	$14,550
286 Circulatory Disorders except AMI, with Cardiac...	19	$163,789	+46%	$26,351
388 Gastrointestinal Obstruction with MCC	19	$75,496	+10%	$16,214
393 Other Digestive System Diagnoses with MCC	19	$89,893	+17%	$18,985
854 Infectious and Parasitic Diseases with O.R. Procedures with...	19	$187,410	+91%	$30,270
180 Respiratory Neoplasms with MCC	18	$114,015	+30%	$19,174
321 Percutaneous Cardiovascular Procedures with Intraluminal...	18	$159,596	-2%	$35,039
602 Cellulitis with MCC	17	$96,749	+61%	$19,935
086 Traumatic Stupor and Coma <1 Hour with CC	16	$89,087	+30%	$14,439

Showing the 60 most frequent of 97 DRGs.

Outpatient services

Service (APC)	Services	Avg charge	Medicare allowed
Comprehensive Observation Services	733	$31,994	$2,593
Level 2 Excision/ Biopsy/ Incision and Drainage	375	$10,629	$1,562
Level 5 Musculoskeletal Procedures	218	$52,181	$12,483
Level 1 Laparoscopy and Related Services	168	$33,473	$5,487
Level 1 Intraocular Procedures	162	$13,830	$2,353
Level 4 Musculoskeletal Procedures	145	$32,386	$6,779
Level 6 Musculoskeletal Procedures	92	$93,863	$18,142
Level 1 Endovascular Procedures	85	$24,756	$3,018
Level 4 Urology and Related Services	70	$17,765	$3,131
Level 3 Vascular Procedures	68	$16,211	$3,043
Level 4 Airway Endoscopy	61	$18,946	$3,778
Level 3 Excision/ Biopsy/ Incision and Drainage	50	$17,983	$2,567
Level 1 Abdominal/Peritoneal/Biliary and Related Procedures	50	$25,212	$3,618
Level 3 Endovascular Procedures	43	$59,124	$10,544
Level 1 Breast/Lymphatic Surgery and Related Procedures	42	$22,986	$3,773
Level 5 Urology and Related Services	42	$22,718	$4,510
Level 2 Upper GI Procedures	40	$19,569	$1,626
Level 3 Urology and Related Services	36	$11,627	$1,771
Level 2 Vascular Procedures	34	$7,745	$1,529
Level 3 Musculoskeletal Procedures	30	$16,474	$3,327
Level 3 Lower GI Procedures	27	$17,647	$2,581
Level 1 Nerve Procedures	26	$14,254	$1,892
Level 2 Laparoscopy and Related Services	25	$45,186	$9,434
Level 5 Gynecologic Procedures	23	$31,353	$5,132
Level 2 Breast/Lymphatic Surgery and Related Procedures	22	$34,039	$6,492

Against the New York average

For Septicemia or Severe Sepsis without MV >96 Hours with MCC (DRG 871), John T Mather Memorial Hospital of Port Jefferson charged $120,309 on average, 3% more than the New York average of $116,930, and was paid $23,627 against a state average of $24,426. For Heart Failure and Shock with MCC (DRG 291), John T Mather Memorial Hospital of Port Jefferson charged $90,549 on average, 12% more than the New York average of $81,161, and was paid $15,066 against a state average of $16,034. For Respiratory Infections and Inflammations with MCC (DRG 177), John T Mather Memorial Hospital of Port Jefferson charged $82,977 on average, 12% less than the New York average of $94,371, and was paid $19,137 against a state average of $19,472. For Septicemia or Severe Sepsis without MV >96 Hours without MCC (DRG 872), John T Mather Memorial Hospital of Port Jefferson charged $76,010 on average, 24% more than the New York average of $61,129, and was paid $12,677 against a state average of $12,692. For Comprehensive Observation Services (outpatient APC 8011), its average charge of $31,994 was 20% above the state average of $26,675. For Level 2 Excision/ Biopsy/ Incision and Drainage (outpatient APC 5072), its average charge of $10,629 was 17% below the state average of $12,815. For Level 5 Musculoskeletal Procedures (outpatient APC 5115), its average charge of $52,181 was 23% below the state average of $67,926. For Level 1 Laparoscopy and Related Services (outpatient APC 5361), its average charge of $33,473 was 5% below the state average of $35,085.

Price-transparency record

No action in CMS's price-transparency enforcement list (July 2026) matches this hospital's exact name, city and state. That can mean CMS has not reviewed it, or that it is listed under a different name.

Charges are the hospital's list prices averaged over its 2024 Medicare cases; payments are what those cases actually brought in. Neither is what you will pay. For a planned procedure, ask the hospital for its price estimate or, if you are uninsured or self-paying, a good-faith estimate.

Sources: CMS Medicare Inpatient Hospitals — by Provider and Service / by Geography and Service, data year 2024; CMS Medicare Outpatient Hospitals — by Provider and Service / by Geography and Service, data year 2024; CMS Hospital Price Transparency Enforcement Activities and Outcomes, July 2026. Checked 2026-10-24. Methodology.