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DR. DENNIS DEMERIA M.D.
NPI 1356717599
Internal Medicine - Gastroenterology in Brooklyn, NY

Active since August 11, 2015PECOS EnrolledAccepts Medicare Assignment
95.38/100
CMS Quality Rating
704 DEGRAW ST, APT 2, BROOKLYN, NY 11217(646) 588-8842 Get Directions Write a Review

NPPES record last updated: August 11, 2015. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Dennis Demeria M.d. NPPES

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

DR. DENNIS DEMERIA M.D. (NPI 1356717599) is an individual gastroenterology provider in Brooklyn, New York, licensed in New York (281320) and active in the NPI registry since August 2015. He is enrolled in Medicare PECOS, is affiliated with Hca Florida Largo Hospital, and is a graduate of Other (2001).

NPPES Registry Identity

NPI1356717599
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. DENNIS DEMERIACredential: M.D.
Location Address704 DEGRAW ST, APT 2Brooklyn, NY 11217-3113
Mailing Address704 Degraw St, Apt 2Brooklyn, NY 11217-3113
Phone(646) 588-8842
Sole ProprietorNo
Medical School CMSOtherGraduated 2001
Enumeration DateAugust 11, 2015
✔ NPI 1356717599 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in NY · 281320
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.
704 DEGRAW ST, Brooklyn, NY 11217
Open in Google Maps ↗

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

Dr. Dennis Demeria 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 ID7113234329
PECOS Enrollment IDI20160222002663
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

4

Medicare enrollment records show Dennis Demeria reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mary Imogene Bassett Hospital
148 mi
Multi-Specialty
1 ATWELL RD
Cooperstown, NY 13326
  • Reassigned Medicare billing, New York enrollment
  • 1,052 clinicians in this Medicare group
NPI 1083664221 (607) 547-6858
Cayuga Medical Associates, PC
181 mi
Internal Medicine
101 DATES DR
Ithaca, NY 14850
  • Reassigned Medicare billing, New York enrollment
  • 328 clinicians in this Medicare group
NPI 1679525455 (607) 274-4011
Champlain Valley Physicians Hospital Medical Center
279 mi
General Acute Care Hospital
75 BEEKMAN ST
Plattsburgh, NY 12901
  • Reassigned Medicare billing, New York enrollment
  • 675 clinicians in this Medicare group
NPI 1033270699 (518) 561-2000
Canton-Potsdam Hospital
281 mi
General Acute Care Hospital
50 LEROY STREET
Potsdam, NY 13676
  • Reassigned Medicare billing, New York enrollment
  • 414 clinicians in this Medicare group
NPI 1568548782 (315) 265-3300

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 4

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.

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
55 services51 patients
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235
This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.
23 services21 patients
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.
16 services15 patients
Control of bleeding of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43255
This procedure involves using a flexible tube with a light, called an endoscope, to examine and treat bleeding in the esophagus, stomach, or upper small bowel. It's a safe, effective way to control bleeding and ensure your digestive health.
13 services11 patients

Hospital Affiliations CMS Care Compare 2

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

Hca Florida Largo Hospital

Acute Care Hospitals · Largo, FL
2/5 CMS rating
OwnershipProprietary
CMS Certification Number100248
Location201 14th St SWLargo, FL 33770 · Pinellas County
Emergency services

Cayuga Medical Center At Ithaca

Acute Care Hospitals · Ithaca, NY
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330307
Location101 Dates DriveIthaca, NY 14850 · Tompkins County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11217 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
$154.28 typical visit price
range $67.40 – $203.53
Typical copayment $38.57 (range $16.85 – $50.88)
Most-billed visit code 99204
Established Patient
$117.62 typical visit price
range $21.66 – $164.45
Typical copayment $29.40 (range $5.41 – $41.11)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

95.38/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality81.26
Promoting Interoperability99.17
Improvement Activities40

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 Dennis Demeria's NPI number?

The NPI number for Dennis Demeria is 1356717599. It was assigned to this individual provider in the NPPES registry on August 11, 2015.

Where is Dennis Demeria located?

Dennis Demeria practices at 704 Degraw St Apt 2, Brooklyn, NY 11217. The listed phone number is (646) 588-8842.

What is Dennis Demeria's specialty?

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

Is Dennis Demeria enrolled in Medicare?

Yes. Dennis Demeria 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 Dennis Demeria's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dennis Demeria reassigns Medicare benefits to 4 organizations: Mary Imogene Bassett Hospital (Cooperstown, NY), Cayuga Medical Associates, PC (Ithaca, NY), Champlain Valley Physicians Hospital Medical Center (Plattsburgh, NY) and Canton-Potsdam Hospital (Potsdam, NY). 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 Dennis Demeria's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Dennis Demeria affiliated with any hospitals?

According to CMS data, Dennis Demeria is affiliated with Hca Florida Largo Hospital and Cayuga Medical Center At Ithaca.

When was this NPI record last updated?

The NPPES record for Dennis Demeria was last updated on August 11, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.