DR. FLOYD CLAYTON BYFIELD M.D
NPI 1780787291
Internal Medicine - Gastroenterology in Sleepy Hollow, NY

Q: What is Floyd Byfield's NPI number?

The NPI number for Floyd Byfield is 1780787291. It was assigned to this individual provider in the NPPES registry on September 7, 2006.

Q: What is Floyd Byfield'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 Floyd Byfield was last updated on June 27, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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 07, 2006PECOS EnrolledAccepts Medicare Assignment

91.25/100

CMS Quality Rating

WESTCHESTER GASTROENTROLOGY ASSOC., PC, 777 NORTH BROADWAY, SUITE # 305, SLEEPY HOLLOW, NY 10591(914) 366-6120(914) 366-4128 Get Directions Write a Review

NPPES record last updated: June 27, 2013. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Dr. Floyd Clayton Byfield M.d NPPES

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

DR. FLOYD CLAYTON BYFIELD M.D (NPI 1780787291) is an individual gastroenterology provider in Sleepy Hollow, New York, licensed in New York (200515) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Northern Westchester Hospital, and is a graduate of Icahn School Of Medicine At Mount Sinai (1993).

NPPES Registry Identity

NPI1780787291

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. FLOYD CLAYTON BYFIELDCredential: M.D

Location AddressWESTCHESTER GASTROENTROLOGY ASSOC., PC, 777 NORTH BROADWAY, SUITE # 305Sleepy Hollow, NY 10591

Mailing AddressWestchester Gastroentrology Assoc., Pc, 777 North Broadway, Suite # 305Sleepy Hollow, NY 10591 · (914) 366-6120 · Fax (914) 366-4128

Phone(914) 366-6120

Fax(914) 366-4128

Sole ProprietorNo

Medical School CMSIcahn School Of Medicine At Mount SinaiGraduated 1993

Enumeration DateSeptember 7, 2006

Last NPPES UpdateJune 27, 2013

✔ NPI 1780787291 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 · 200515

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.

WESTCHESTER GASTROENTROLOGY ASSOC., PC, Sleepy Hollow, NY 10591

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Other Identifiers 4

Medicare UPING36383NY

Other133496674NY · Tax Id

Medicare ID-Type Unspecified771291NY

Medicaid016823018NY

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. Floyd Clayton Byfield 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 ID2062506249

PECOS Enrollment IDI20110207000120

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 Reassignment

Medicare enrollment records show Floyd Byfield reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

North Shore-Lij Medical PC

24 mi

Urology

1010 NORTHERN BLVD STE 110
Great Neck, NY 11021

Reassigned Medicare billing, New York enrollment
9,353 clinicians in this Medicare group

NPI 1053688572 (516) 321-7400

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 14

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.

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.

293 services106 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.

136 services117 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.

129 services122 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.

129 services128 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.

124 services118 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.

108 services108 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.

66 services66 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

49 services49 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

49 services47 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

36 services34 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.

32 services23 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.

25 services20 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.

24 services24 patients

Emergency department visit with moderate level of medical decision making 99284

An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.

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.

Northern Westchester Hospital

Acute Care Hospitals · Mount Kisco, NY

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330162

Location400 East Main StreetMount Kisco, NY 10549 · Westchester County

Emergency services Birthing friendly

Phelps Hospital

Acute Care Hospitals · Sleepy Hollow, NY

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330261

Location701 N BroadwaySleepy Hollow, NY 10591 · Westchester County

Emergency services Birthing friendly

Hudson Valley Hospital Center

Acute Care Hospitals · Cortlandt Manor, NY

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330267

Location1980 Crompond RoadCortlandt Manor, NY 10567 · Westchester County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10591 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.

91.25/100

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

Scored through an Alternative Payment Model

Quality

74.92

Promoting Interoperability

91.67

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 Floyd Byfield's NPI number?

The NPI number for Floyd Byfield is 1780787291. It was assigned to this individual provider in the NPPES registry on September 7, 2006.

Where is Floyd Byfield located?

Floyd Byfield practices at Westchester Gastroentrology Assoc., PC 777 North Broadway, Suite # 305, Sleepy Hollow, NY 10591. The listed phone number is (914) 366-6120.

What is Floyd Byfield's specialty?

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

Is Floyd Byfield enrolled in Medicare?

Yes. Floyd Byfield 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 organization bills Medicare for Floyd Byfield's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Floyd Byfield reassigns Medicare benefits to North Shore-Lij Medical PC (Great Neck, NY). The 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 Floyd Byfield's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Floyd Byfield affiliated with any hospitals?

According to CMS data, Floyd Byfield is affiliated with Northern Westchester Hospital, Phelps Hospital and Hudson Valley Hospital Center.

When was this NPI record last updated?

The NPPES record for Floyd Byfield was last updated on June 27, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.