LOUIS D. MAY M.D.
NPI 1164426987
Internal Medicine - Gastroenterology in New City, NY

Q: What is Louis May's NPI number?

The NPI number for Louis May is 1164426987. It was assigned to this individual provider in the NPPES registry on June 9, 2005.

Q: What is Louis May'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 Louis May was last updated on August 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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 09, 2005PECOS EnrolledAccepts Medicare Assignment

28.32/100

CMS Quality Rating

500 NEW HEMPSTEAD RD, NEW CITY, NY 10956(845) 362-3200(845) 362-4464 Get Directions Write a Review

NPPES record last updated: August 20, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Louis D. May M.d. NPPES

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

LOUIS D. MAY M.D. (NPI 1164426987) is an individual gastroenterology provider in New City, New York, licensed in New York (153768) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS, is affiliated with Good Samaritan Hospital Of Suffern, and maintains a secondary practice location in Morrisville.

NPPES Registry Identity

NPI1164426987

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameLOUIS D. MAYCredential: M.D.

Location Address500 NEW HEMPSTEAD RDNew City, NY 10956-1132

Mailing Address500 New Hempstead RdNew City, NY 10956-1132 · (845) 362-3200 · Fax (845) 362-4464

Phone(845) 362-3200

Fax(845) 362-4464

Sole ProprietorNo

Medical School CMSUniversity Of Miami, Lm Miller School Of MedicineGraduated 1978

Enumeration DateJune 9, 2005

Last NPPES UpdateAugust 20, 2025

NPPES CertifiedAugust 19, 2025

✔ NPI 1164426987 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

Licenses✔ Licensed in NY · 153768✔ Licensed in VT · 042.0018332

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.

500 NEW HEMPSTEAD RD, New City, NY 10956

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Secondary Practice Location 1

Location 1528 Washington HwyMorrisville, VT 05661-8973 · Phone (802) 888-8888 · Fax (802) 888-8131

Other Identifiers 2

Medicaid6721057VT

Medicaid00766087NY

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.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

Louis D. May 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 ID9830285899

PECOS Enrollment IDI20100917000301, I20250430000784

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 Louis May reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Montefiore Nyack Hospital

6.7 mi

Neurology

160 N MIDLAND AVE
Nyack, NY 10960

Reassigned Medicare billing, New York enrollment
119 clinicians in this Medicare group

NPI 1073881835 (845) 348-6607

Highland Medical P.C.

6.7 mi

General Practice

160 N MIDLAND AVE
Nyack, NY 10960

Reassigned Medicare billing, New York enrollment
41 clinicians in this Medicare group

NPI 1376600304 (845) 348-2985

Bon Secours Charity Health System Medical Group, P.C.

19 mi

Internal Medicine

20 GRAND ST, 3RD FLOOR
Warwick, NY 10990

Reassigned Medicare billing, New York enrollment
176 clinicians in this Medicare group

NPI 1487694345 (845) 987-3906

Gastrointestinal Care Of Long Island PLLC

44 mi

Gastroenterology

187 VETERANS BLVD
Massapequa, NY 11758

Reassigned Medicare billing, New York enrollment
223 clinicians in this Medicare group

NPI 1265571863 (516) 795-5523

Copley Hospital, Inc.

246 mi

Critical Access

528 WASHINGTON HIGHWAY
Morrisville, VT 05661

Reassigned Medicare billing, Vermont enrollment
Also billed through NPI 1295774842 (Vermont)
88 clinicians in this Medicare group

NPI 1568414365 (802) 888-4231

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 18

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.

178 services155 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.

161 services111 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.

93 services90 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.

92 services92 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.

87 services87 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.

73 services73 patients

Telephone medical discussion with physician, 11-20 minutes 99442

This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.

52 services42 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.

49 services45 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.

45 services45 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.

44 services36 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

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.

36 services36 patients

Pathology examination of tissue using a microscope, intermediate complexity 88305

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

35 services13 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.

26 services24 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.

24 services20 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

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.

16 services15 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.

13 services13 patients

Hospital Affiliations CMS Care Compare 2

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

Good Samaritan Hospital Of Suffern

Acute Care Hospitals · Suffern, NY

3/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number330158

Location255 Lafayette AvenueSuffern, NY 10901 · Rockland County

Emergency services Birthing friendly

Copley Hospital

Critical Access Hospitals · Morrisville, VT

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number471305

Location528 Washington HighwayMorrisville, VT 05661 · Lamoille County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10956 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.

28.32/100

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

Individually scored

Quality

Improvement Activities

Cost

94.41

Reported Quality Measures

Colonoscopy Interval for Patients with a History of Adenomatous Polyps - Avoidance of Inappropriate Use

Percentage of patients aged 18 years and older receiving a surveillance colonoscopy, with a history of a prior adenomatous polyp(s) in previous colonoscopy findings, which had an interval of 3 or more years since their last colonoscopy

97%211 patients4/55-star benchmark: 100%

Colorectal Cancer Screening

Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer

89%356 patients4/55-star benchmark: 99%

Documentation of Current Medications in the Medical Record

Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.

100%749 patients5/55-star benchmark: 100%

e-Prescribing

At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.

60%624 patients3/55-star benchmark: 100%

Medication Reconciliation

The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.

97%420 patients4/55-star benchmark: 100%

Patient-Specific Education

The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.

1%414 patients1/55-star benchmark: 100%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…

96%583 patients4/55-star benchmark: 100%

Preventive Care and Screening: Unhealthy Alcohol Use: Screening & Brief Counseling

Percentage of patients aged 18 years and older who were screened for unhealthy alcohol use using a systematic screening method at least once within the last 24 months AND who received brief counseling if identified as an unhealthy alcohol user

96%117 patients4/55-star benchmark: 100%

Provide Patient Access

At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…

71%414 patients3/55-star benchmark: 100%

Secure Messaging

For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…

31%414 patients2/55-star benchmark: 79%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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.

SHARON MOLINAS M.D.

Internal Medicine (Gastroenterology)

500 NEW HEMPSTEAD RD
NEW CITY, NY 10956

Rockland County (845) 362-3200

MIRIAM BOBROFF LCSW CLINICA LSERVICES PC

Social Worker (Clinical)

500 NEW HEMPSTEAD RD, SUITE D
NEW CITY, NY 10956

Rockland County (845) 270-0219

STEPHEN GOODMAN M.D.

Internal Medicine (Gastroenterology)

500 NEW HEMPSTEAD RD
NEW CITY, NY 10956

Rockland County (845) 362-3200

STEVEN M. SOCKIN, M.D. P.C.

Allergy & Immunology

500 NEW HEMPSTEAD RD, SUITE C
NEW CITY, NY 10956

Rockland County (845) 362-3222

MICHAEL T. KRAM M.D.

Internal Medicine (Gastroenterology)

500 NEW HEMPSTEAD RD
NEW CITY, NY 10956

Rockland County (845) 362-3200

DR. JOSHUA ROBERT OLSTEIN MD

Internal Medicine (Gastroenterology)

500 NEW HEMPSTEAD RD
NEW CITY, NY 10956

Rockland County (845) 362-3200

MR. DAVID JONATHAN NYER LCSW

Social Worker (Clinical)

500 NEW HEMPSTEAD RD, SUITE D
NEW CITY, NY 10956

Rockland County (718) 813-2682

WINSON LO M.D.

Internal Medicine (Gastroenterology)

500 NEW HEMPSTEAD RD
NEW CITY, NY 10956

Rockland County (845) 362-3200

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 Louis May's NPI number?

The NPI number for Louis May is 1164426987. It was assigned to this individual provider in the NPPES registry on June 9, 2005.

Where is Louis May located?

Louis May practices at 500 New Hempstead Rd, New City, NY 10956. The listed phone number is (845) 362-3200.

What is Louis May's specialty?

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

Is Louis May enrolled in Medicare?

Yes. Louis May 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 Louis May's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Louis May reassigns Medicare benefits to 5 organizations: Montefiore Nyack Hospital (Nyack, NY), Highland Medical P.C. (Nyack, NY), Bon Secours Charity Health System Medical Group, P.C. (Warwick, NY), Gastrointestinal Care Of Long Island PLLC (Massapequa, NY) and Copley Hospital, Inc. (Morrisville, VT). 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 Louis May's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Louis May accept?

Health plans from Anthem Blue Cross and Blue Shield list Louis May 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 Louis May affiliated with any hospitals?

According to CMS data, Louis May is affiliated with Good Samaritan Hospital Of Suffern and Copley Hospital.

When was this NPI record last updated?

The NPPES record for Louis May was last updated on August 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.