DR. THOMAS FIEST D.O.
NPI 1265533772
Internal Medicine - Gastroenterology in Eatontown, NJ

Q: What is Thomas Fiest's NPI number?

The NPI number for Thomas Fiest is 1265533772. It was assigned to this individual provider in the NPPES registry on September 26, 2006.

Q: What is Thomas Fiest'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 Thomas Fiest was last updated on October 15, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.

Active since September 26, 2006PECOS EnrolledAccepts Medicare Assignment

97.45/100

CMS Quality Rating

142 ROUTE 35 SOUTH, EATONTOWN, NJ 07724(732) 389-5004(732) 389-1850 Get Directions Write a Review

NPPES record last updated: October 15, 2009. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Thomas Fiest D.o. NPPES

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

DR. THOMAS FIEST D.O. (NPI 1265533772) is an individual gastroenterology provider in Eatontown, New Jersey, licensed in New Jersey (MB50586) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Riverview Medical Center, and is a graduate of Philadelphia College Of Osteopathic Medicine (1985).

NPPES Registry Identity

NPI1265533772

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. THOMAS FIESTCredential: D.O.

Location Address142 ROUTE 35 SOUTHEatontown, NJ 07724

Mailing Address142 Route 35 SouthEatontown, NJ 07724 · (732) 389-5004 · Fax (732) 389-1744

Phone(732) 389-5004

Fax(732) 389-1850

Sole ProprietorNo

Medical School CMSPhiladelphia College Of Osteopathic MedicineGraduated 1985

Enumeration DateSeptember 26, 2006

Last NPPES UpdateOctober 15, 2009

✔ NPI 1265533772 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 NJ · MB50586

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.

142 ROUTE 35 SOUTH, Eatontown, NJ 07724

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Other Identifiers 3

Medicaid2283107NJ

Medicare UPINE62052NJ

Medicare PIN595285C1JNJ

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware.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

Dr. Thomas Fiest D.o. 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 ID5092798470

PECOS Enrollment IDI20050420000308

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 Thomas Fiest reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Allied Digestive Health, LLC

2.0 mi

Gastroenterology

187 ROUTE 36, MONMOUTH CORPORATE PARK CENTER I;BUILDING A, SUITE 230
West Long Beach, NJ 07764

Reassigned Medicare billing, New Jersey enrollment
406 clinicians in this Medicare group

NPI 1265831259 (732) 222-3805

Hackensack Meridian Health Medical Group - Specialty Care PC

3.5 mi

Surgical Critical Care

331 NEWMAN SPRINGS RD STE 220
Red Bank, NJ 07701

Reassigned Medicare billing, New Jersey enrollment
2,844 clinicians in this Medicare group

NPI 1215989249 (732) 807-0800

Barnabas Health Medical Group, PC

35 mi

Specialist

95 OLD SHORT HILLS RD
West Orange, NJ 07052

Reassigned Medicare billing, New Jersey enrollment
757 clinicians in this Medicare group

NPI 1447206420 (888) 724-7123

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 16

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.

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.

288 services242 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.

160 services149 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.

123 services119 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.

123 services117 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.

97 services95 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.

91 services91 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.

56 services45 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.

40 services40 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

37 services37 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

23 services23 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

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.

18 services18 patients

Ultrasound scan of organ tissue for measuring elasticity 76981

An ultrasound scan of organ tissue measures elasticity, or flexibility. This non-invasive procedure uses sound waves to create images of the inside of your body. It helps in assessing the health of various organs by detecting changes in their stiffness or softness.

15 services15 patients

Removal of polyps or growths of esophagus, stomach, and/or upper small bowel using an endoscope with mechanical snare 43251

This procedure involves the use of a thin, flexible instrument called an endoscope to visualize and remove abnormal growths, known as polyps, from the esophagus, stomach, or upper small bowel. A tool called a mechanical snare is used to safely cut and remove these growths.

14 services14 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

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 3

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

Riverview Medical Center

Acute Care Hospitals · Red Bank, NJ

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number310034

LocationOne Riverview PlazaRed Bank, NJ 07701 · Monmouth County

Emergency services Birthing friendly

Jersey Shore University Medical Center

Acute Care Hospitals · Neptune, NJ

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number310073

Location1945 State Route 33Neptune, NJ 07753 · Monmouth County

Emergency services Birthing friendly

Monmouth Medical Center

Acute Care Hospitals · Long Branch, NJ

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number310075

Location300 Second AvenueLong Branch, NJ 07740 · Monmouth County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 07724 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

$140.34 typical visit price

range $61.59 – $185.05

Typical copayment $35.08 (range $15.39 – $46.26)

Most-billed visit code 99204

Established Patient

$107.94 typical visit price

range $20.08 – $150.98

Typical copayment $26.98 (range $5.02 – $37.74)

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.

97.45/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Promoting Interoperability

Improvement Activities

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 Thomas Fiest's NPI number?

The NPI number for Thomas Fiest is 1265533772. It was assigned to this individual provider in the NPPES registry on September 26, 2006.

Where is Thomas Fiest located?

Thomas Fiest practices at 142 Route 35 South, Eatontown, NJ 07724. The listed phone number is (732) 389-5004.

What is Thomas Fiest's specialty?

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

Is Thomas Fiest enrolled in Medicare?

Yes. Thomas Fiest 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 Thomas Fiest's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Fiest reassigns Medicare benefits to 3 organizations: Allied Digestive Health, LLC (West Long Beach, NJ), Hackensack Meridian Health Medical Group - Specialty Care PC (Red Bank, NJ) and Barnabas Health Medical Group, PC (West Orange, 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 Thomas Fiest's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Thomas Fiest accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Thomas Fiest 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 Thomas Fiest affiliated with any hospitals?

According to CMS data, Thomas Fiest is affiliated with Riverview Medical Center, Jersey Shore University Medical Center and Monmouth Medical Center.

When was this NPI record last updated?

The NPPES record for Thomas Fiest was last updated on October 15, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.