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JAY IRVING STACK M.D.
NPI 1245325026
Internal Medicine - Nephrology in Morristown, NJ

Active since October 04, 2006PECOS EnrolledAccepts Medicare Assignment
95 MADISON AVE, MORRISTOWN, NJ 07960(973) 775-5151(908) 673-7336 Get Directions Write a Review

NPPES record last updated: December 20, 2017. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Jay Irving Stack M.d. NPPES

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

JAY IRVING STACK M.D. (NPI 1245325026) is an individual nephrology provider in Morristown, New Jersey, licensed in New Jersey (25MA03875700) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Morristown Medical Center, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (1976).

NPPES Registry Identity

NPI1245325026
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameJAY IRVING STACKCredential: M.D.
Location Address95 MADISON AVEMorristown, NJ 07960-6092
Mailing Address2 Franklin PlMorristown, NJ 07960-5305 · (973) 267-7673 · Fax (973) 267-3270
Phone(973) 775-5151
Fax(908) 673-7336
Sole ProprietorNo
Medical School CMSPerelman School Of Med At The University Of PennsylvaniaGraduated 1976
Enumeration DateOctober 4, 2006
Last NPPES UpdateDecember 20, 2017
✔ NPI 1245325026 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in NJ · 25MA03875700
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
95 MADISON AVE, Morristown, NJ 07960
Open in Google Maps ↗

Other Identifiers 1

Medicaid244970602NJ

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Jay Irving Stack 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 ID5890869895
PECOS Enrollment IDI20100826001010
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Jay Stack reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Nephrological Associates, PA
4.7 mi
Specialist
83 HANOVER ROAD, SUITE 290
Florham Park, NJ 07932
  • Reassigned Medicare billing, New Jersey enrollment
  • 21 clinicians in this Medicare group
NPI 1740407923 (973) 736-2212
Northeast Kidney Care LLC
52 mi
Internal Medicine
210 JACK MARTIN BLVD STE D1
Brick, NJ 08724
  • Reassigned Medicare billing, New Jersey enrollment
  • 78 clinicians in this Medicare group
NPI 1023889565 (732) 458-5854

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Dialysis services, 4 or more physician visits per month (20 years or older) 90960
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
350 services39 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
268 services142 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
59 services33 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
42 services42 patients
Automated urinalysis test 81003
An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.
13 services12 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Morristown Medical Center

Acute Care Hospitals · Morristown, NJ
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number310015
Location100 Madison AveMorristown, NJ 07960 · Morris County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 07960 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
$144.86 typical visit price
range $63.84 – $190.92
Typical copayment $36.21 (range $15.96 – $47.73)
Most-billed visit code 99204
Established Patient
$111.57 typical visit price
range $20.97 – $155.92
Typical copayment $27.89 (range $5.24 – $38.98)
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.

Referred Medical Equipment & Supplies CMS DME claims 6

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Azathioprine, oral, 50 mg J7500
Treatment-Treatment - Miscellaneous · category RX029N
1 supplier11 claims660 services$1.06 avg. paid by Medicare
Cyclosporine, oral, 100 mg J7502
Treatment-Treatment - Miscellaneous · category RX029N
1 supplier12 claims720 services$1.54 avg. paid by Medicare
Tacrolimus, immediate release, oral, 1 mg J7507
Treatment-Treatment - Miscellaneous · category RX029N
8 suppliers69 claims4,050 services$0.31 avg. paid by Medicare
Mycophenolate mofetil, oral, 250 mg J7517
Treatment-Treatment - Miscellaneous · category RX029N
7 suppliers68 claims12,480 services$0.18 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
9 suppliers62 claims62 services$18.53 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
10 suppliers103 claims112 services$12.15 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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. DAVID JOEL MEDFORD MD
Ophthalmology
95 MADISON AVE, SUITE 400
MORRISTOWN, NJ 07960
Morris County (973) 984-5005
SURGICAL SPECIALISTS OF NEW JERSEY
Specialist
95 MADISON AVE, SUITE 109
MORRISTOWN, NJ 07960
Morris County (976) 539-6900
MR. JACQUELINE ELIZABETH FEARON-CLARKE NURSE PRACTITIONER
Nurse Practitioner (Acute Care)
95 MADISON AVE, SUITE 411
MORRISTOWN, NJ 07960
Morris County (973) 971-4179
JULIANNA SHER OD
Optometrist
95 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (973) 718-5780
DAVID I FREILICH MD
Internal Medicine (Interventional Cardiology)
95 MADISON AVE, STE A10
MORRISTOWN, NJ 07960
Morris County (973) 889-9001
SUMMIT MEDICAL GROUP PA
Durable Medical Equipment & Medical Supplies
95 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (973) 524-7004
MICHELLE THURLOW
Physician Assistant (Surgical)
95 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (908) 389-6340
PRIMARY CARE PARTNERS, LLC
Internal Medicine
95 MADISON AVE, SUITE A00
MORRISTOWN, NJ 07960
Morris County (973) 538-1388

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 Jay Stack's NPI number?

The NPI number for Jay Stack is 1245325026. It was assigned to this individual provider in the NPPES registry on October 4, 2006.

Where is Jay Stack located?

Jay Stack practices at 95 Madison Ave, Morristown, NJ 07960. The listed phone number is (973) 775-5151.

What is Jay Stack's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Jay Stack enrolled in Medicare?

Yes. Jay Stack 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.

Which organizations bill Medicare for Jay Stack's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jay Stack reassigns Medicare benefits to 2 organizations: Nephrological Associates, PA (Florham Park, NJ) and Northeast Kidney Care LLC (Brick, NJ). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Jay Stack's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Jay Stack accept?

Health plans from Oscar Health list Jay Stack as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Jay Stack affiliated with any hospitals?

According to CMS data, Jay Stack is affiliated with Morristown Medical Center.

When was this NPI record last updated?

The NPPES record for Jay Stack was last updated on December 20, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.