Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Stephen M. Mulrooney, MD, FACG

Individual provider Internal Medicine Physician · NPI 1700880168

Dr. Stephen M. Mulrooney, MD, FACG practises Gastroenterology in New York, New York. Graduated from Albany Medical College of Union University in 1985, 41 years ago. Practices with North Shore Medical Group of the Mount Sinai School of Medicine, a 323-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
41
Trained at
Albany Medical College of Union University
Licensed in
NY
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

31 Washington Sq W Apt 5F
New York, NY 10011-9172
Phone: (212) 358-9123
Fax: (212) 358-1075
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 168802 (NY)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 168802 (NY)

Record details

NPI number1700880168
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , FACG
Sole proprietorYes
NPI enumeratedJune 13, 2005
Last updated in NPPESSeptember 11, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Medical schoolALBANY MEDICAL COLLEGE OF UNION UNIVERSITY
Graduated 1985 (41 years in practice)
Group practice North Shore Medical Group Of The Mount Sinai School Of Medicine — 323 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Upper gastrointestinal (GI) endoscopy for acid reflux 66 times · 68th percentile
Colonoscopy 41 times · 59th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients186
Services billed 382 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $483 25 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Chsli St Joseph Hospital Hospital · Bethpage, NY · listed as St Joseph Hospital
  • Mount Sinai South Nassau Hospital · Oceanside, NY

Colleagues at North Shore Medical Group of the Mount Sinai School of Medicine

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 323 clinicians in the practice; 12 are shown here.

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