1. Home
  2. Directory
  3. New Jersey
  4. Morristown
  5. Internal Medicine
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. STEVEN NATHANIEL STEINWAY M.D., PH.D.
NPI 1801327432
Internal Medicine - Gastroenterology in Morristown, NJ

Active since March 24, 2017PECOS EnrolledAccepts Medicare Assignment
101 MADISON AVE STE 100, MORRISTOWN, NJ 07960(973) 455-0404(973) 540-8788 Get Directions Write a Review

NPPES record last updated: June 24, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Feb 4, 2026, Sep 1, 2023, May 26, 2023 and 3 more (6 updates tracked since 2017).

About Dr. Steven Nathaniel Steinway M.d., Ph.d. NPPES

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

DR. STEVEN NATHANIEL STEINWAY M.D., PH.D. (NPI 1801327432) is an individual gastroenterology provider in Morristown, New Jersey, licensed in New Jersey (25MA12920400) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1801327432
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. STEVEN NATHANIEL STEINWAYCredential: M.D., PH.D.
Location Address101 MADISON AVE STE 100Morristown, NJ 07960-7305
Mailing Address101 Madison Ave Ste 100Morristown, NJ 07960-7305 · (973) 455-0404 · Fax (973) 540-8788
Phone(973) 455-0404
Fax(973) 540-8788
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateMarch 24, 2017
Last NPPES UpdateJune 24, 20266 updates tracked since enumeration
NPPES CertifiedJune 24, 2026
✔ NPI 1801327432 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Licenses✔ Licensed in NJ · 25MA12920400✔ Licensed in MA · 1014222
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
Also ListedInternal MedicineTaxonomy 207R00000X · License D0089048 (MD)
101 MADISON AVE STE 100, Morristown, NJ 07960
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Steven Nathaniel Steinway M.d., Ph.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 ID1557638343
PECOS Enrollment IDI20230525001906, I20230605002902
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.

Areas of Expertise CMS Part B claims 10

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.

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
45 services44 patients
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito G0500
Moderate sedation is a method where a physician uses medication to help you relax during a gastrointestinal endoscopy. An independent trained observer will be present to monitor your vital signs and ensure your safety throughout the procedure. It's a common and safe practice.
29 services29 patients
Review by radiologist of image from tube placement into bile duct using an endoscope 74328
This procedure involves a specialist, called a radiologist, examining an image taken during a tube placement into your bile duct. The tube is inserted with the help of a tool called an endoscope. This allows the doctor to check for any issues or abnormalities in your bile duct.
26 services22 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
22 services22 patients
Removal of stone or debris from bile or pancreatic duct using a flexible endoscope 43264
This procedure, called an endoscopic retrograde cholangiopancreatography (ERCP), involves using a flexible tube with a camera (endoscope) to locate and remove stones or debris from your bile or pancreatic duct. It's a non-surgical method to clear the ducts, enhancing your digestive health.
18 services13 patients
Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43259
This procedure involves a flexible tube with a camera, called an endoscope, inserted through your mouth to examine your esophagus, stomach, and upper small bowel. An ultrasound device on the endoscope helps get detailed images. It's safe and helps diagnose various conditions.
17 services17 patients

Hospital Affiliations CMS Care Compare 5

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

Massachusetts General Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220071
Location55 Fruit StreetBoston, MA 02114 · Suffolk County
Emergency services Birthing friendly

South Shore Hospital

Acute Care Hospitals · South Weymouth, MA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220100
Location55 Fogg RoadSouth Weymouth, MA 02190 · Norfolk County
Emergency services Birthing friendly

Newton-Wellesley Hospital

Acute Care Hospitals · Newton, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220101
Location2014 Washington StreetNewton, MA 02462 · Middlesex County
Emergency services Birthing friendly

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220110
Location75 Francis StreetBoston, MA 02115 · Suffolk County
Emergency services Birthing friendly

Faulkner Hospital-Brigham And Women's

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220119
Location1153 Centre StreetBoston, MA 02130 · Suffolk County
Emergency services

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.

Other Providers at the Same Location NPPES

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

NICHOLAS P TARANGELO MD
Internal Medicine (Gastroenterology)
101 MADISON AVE STE 100
MORRISTOWN, NJ 07960
Morris County (973) 455-0404

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 Steven Steinway's NPI number?

The NPI number for Steven Steinway is 1801327432. It was assigned to this individual provider in the NPPES registry on March 24, 2017.

Where is Steven Steinway located?

Steven Steinway practices at 101 Madison Ave Ste 100, Morristown, NJ 07960. The listed phone number is (973) 455-0404.

What is Steven Steinway's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Steven Steinway enrolled in Medicare?

Yes. Steven Steinway 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.

Is Steven Steinway affiliated with any hospitals?

According to CMS data, Steven Steinway is affiliated with Massachusetts General Hospital, South Shore Hospital, Newton-Wellesley Hospital, Brigham And Women's Hospital and Faulkner Hospital-Brigham And Women's.

When was this NPI record last updated?

The NPPES record for Steven Steinway was last updated on June 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 51 days 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.