DR. ROBERT JOHN BIERWIRTH M.D.
NPI 1053517565
Internal Medicine - Gastroenterology in Cranston, RI

Q: What is Robert Bierwirth's NPI number?

The NPI number for Robert Bierwirth is 1053517565. It was assigned to this individual provider in the NPPES registry on June 22, 2007.

Q: What is Robert Bierwirth's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Robert Bierwirth was last updated on October 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.

Active since June 22, 2007PECOS EnrolledAccepts Medicare Assignment

1150 RESERVOIR AVE, SUITE 201, CRANSTON, RI 02920(401) 943-1300 Get Directions Write a Review

NPPES record last updated: October 15, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Robert John Bierwirth M.d. NPPES

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

DR. ROBERT JOHN BIERWIRTH M.D. (NPI 1053517565) is an individual gastroenterology provider in Cranston, Rhode Island, licensed in Rhode Island (13848) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, is affiliated with Roger Williams Medical Center, and is a graduate of Other (2003).

NPPES Registry Identity

NPI1053517565

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. ROBERT JOHN BIERWIRTHCredential: M.D.

Location Address1150 RESERVOIR AVE, SUITE 201Cranston, RI 02920-6068

Mailing AddressPo Box 202230Dallas, TX 75320-2230 · (401) 943-1300

Phone(401) 943-1300

Sole ProprietorNo

Medical School CMSOtherGraduated 2003

Enumeration DateJune 22, 2007

Last NPPES UpdateOctober 15, 2025

NPPES CertifiedOctober 15, 2025

✔ NPI 1053517565 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in RI · 13848

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 Medicine · HepatologyTaxonomy 207RI0008X · License 13848 (RI)

1150 RESERVOIR AVE, Cranston, RI 02920

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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. Robert John Bierwirth 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 ID8426214859

PECOS Enrollment IDI20120730000262

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

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

Internal Medicine Associates Inc

Same address

Gastroenterology

1150 RESERVOIR AVE, SUITE 201
Cranston, RI 02920

Reassigned Medicare billing, Rhode Island enrollment
8 clinicians in this Medicare group

NPI 1376553990 (401) 943-1300

University Gastroenterology, LLC

3.5 mi

Gastroenterology

33 STANIFORD ST
Providence, RI 02905

Reassigned Medicare billing, Rhode Island enrollment
141 clinicians in this Medicare group

NPI 1386952612 (401) 421-8800

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 15

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.

109 services107 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.

106 services82 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

60 services52 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.

59 services58 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

53 services53 patients

Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm 43249

This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.

24 services19 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

21 services21 patients

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.

21 services21 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

17 services17 patients

Ultrasound guided needle aspiration or biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43242

This procedure involves using an ultrasound to guide a needle to specific areas in the esophagus, stomach, or upper small bowel. A flexible endoscope is used to reach these areas. The needle collects a small sample for testing.

16 services16 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

16 services16 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

15 services15 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

15 services15 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.

14 services12 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

11 services11 patients

Hospital Affiliations CMS Care Compare 5

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

Roger Williams Medical Center

Acute Care Hospitals · Providence, RI

4/5 CMS rating

OwnershipProprietary

CMS Certification Number410004

Location825 Chalkstone AvenueProvidence, RI 02908 · Providence County

Emergency services

Our Lady Of Fatima Hospital

Acute Care Hospitals · North Providence, RI

3/5 CMS rating

OwnershipProprietary

CMS Certification Number410005

Location200 High Service AvenueNorth Providence, RI 02904 · Providence County

Emergency services

Rhode Island Hospital

Acute Care Hospitals · Providence, RI

3/5 CMS rating

OwnershipTribal

CMS Certification Number410007

Location593 Eddy StreetProvidence, RI 02903 · Providence County

Emergency services

South County Hospital Inc

Acute Care Hospitals · Wakefield, RI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number410008

Location100 Kenyon AveWakefield, RI 02879 · Washington County

Emergency services Birthing friendly

The Miriam Hospital

Acute Care Hospitals · Providence, RI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number410012

Location164 Summit AvenueProvidence, RI 02906 · Providence County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02920 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

$134.17 typical visit price

range $58.57 – $177.03

Typical copayment $33.54 (range $14.64 – $44.25)

Most-billed visit code 99204

Established Patient

$103.10 typical visit price

range $18.92 – $144.38

Typical copayment $25.77 (range $4.73 – $36.09)

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 20

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

THOMAS HENRY MCGREEN M.D.

Internal Medicine (Gastroenterology)

1150 RESERVOIR AVE, SUITE 201
CRANSTON, RI 02920

Providence County (401) 943-1300

DR. ROBERT L GRAVES D.O.

Internal Medicine

1150 RESERVOIR AVE, SUITE 304
CRANSTON, RI 02920

Providence County (401) 942-3330

DR. MICHAEL LEE JACOBS PT, DPT

Physical Therapist

1150 RESERVOIR AVE, SUITE 103
CRANSTON, RI 02920

Providence County (401) 942-2625

DR. JOSEPH N DERUOSI MD

Emergency Medicine (Emergency Medical Services)

1150 RESERVOIR AVE
CRANSTON, RI 02920

Providence County (401) 946-2400

DR. JAMES ROY BONNER M.D.

Pediatrics

1150 RESERVOIR AVE, SUITE 205
CRANSTON, RI 02920

Providence County (401) 943-9222

ANITA OFORIWAA OBENG APRN

Nurse Practitioner (Psychiatric/Mental Health)

1150 RESERVOIR AVE
CRANSTON, RI 02920

Providence County (401) 259-0340

RAYMOND A LAMBERT III

Counselor (Mental Health)

1150 RESERVOIR AVE
CRANSTON, RI 02920

Providence County (401) 259-0340

JESSICA MEDINA

Optometrist

1150 RESERVOIR AVE
CRANSTON, RI 02920

Providence County (401) 943-8151

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 Robert Bierwirth's NPI number?

The NPI number for Robert Bierwirth is 1053517565. It was assigned to this individual provider in the NPPES registry on June 22, 2007.

Where is Robert Bierwirth located?

Robert Bierwirth practices at 1150 Reservoir Ave Suite 201, Cranston, RI 02920. The listed phone number is (401) 943-1300.

What is Robert Bierwirth's specialty?

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

Is Robert Bierwirth enrolled in Medicare?

Yes. Robert Bierwirth 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 Robert Bierwirth's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Robert Bierwirth reassigns Medicare benefits to 2 organizations: Internal Medicine Associates Inc (Cranston, RI) and University Gastroenterology, LLC (Providence, RI). 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 Robert Bierwirth's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Robert Bierwirth affiliated with any hospitals?

According to CMS data, Robert Bierwirth is affiliated with Roger Williams Medical Center, Our Lady Of Fatima Hospital, Rhode Island Hospital, South County Hospital Inc and The Miriam Hospital.

When was this NPI record last updated?

The NPPES record for Robert Bierwirth was last updated on October 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.