MARK LIEB MD
NPI 1619921749
Internal Medicine - Cardiovascular Disease in Mount Kisco, NY

Q: What is Mark Lieb's NPI number?

The NPI number for Mark Lieb is 1619921749. It was assigned to this individual provider in the NPPES registry on May 22, 2006.

Q: What is Mark Lieb's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Q: When was this NPI record last updated?

The NPPES record for Mark Lieb was last updated on November 15, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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 May 22, 2006PECOS EnrolledAccepts Medicare Assignment

90 S BEDFORD RD, CARE MOUNT MEDICAL PC, MOUNT KISCO, NY 10549(914) 241-1050(914) 242-1516 Get Directions Write a Review

NPPES record last updated: November 15, 2016. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Mark Lieb Md NPPES

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

MARK LIEB MD (NPI 1619921749) is an individual cardiovascular disease provider in Mount Kisco, New York, licensed in New York (180753) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Northern Westchester Hospital, and is a graduate of Boston University School Of Medicine (1988).

NPPES Registry Identity

NPI1619921749

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameMARK LIEBCredential: MD

Location Address90 S BEDFORD RD, CARE MOUNT MEDICAL PCMount Kisco, NY 10549-3412

Mailing Address110 South Bedford Road, Care Mount Medical PcMount Kisco, NY 10549-3412 · (914) 241-1050 · Fax (914) 242-1516

Phone(914) 241-1050

Fax(914) 242-1516

Sole ProprietorNo

Medical School CMSBoston University School Of MedicineGraduated 1988

Enumeration DateMay 22, 2006

Last NPPES UpdateNovember 15, 2016

✔ NPI 1619921749 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in NY · 180753

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

90 S BEDFORD RD, Mount Kisco, NY 10549

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Other Identifiers 3

Medicaid01683210NY

Medicare UPINE76279NY

Medicare PIN78F5206761NY

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

Mark Lieb Md 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 ID2961448980

PECOS Enrollment IDI20050630000013

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

Optum Medical Care, P.C.

Same address

Cardiovascular Disease

90 SOUTH BEDFORD RD, MT KISCO MEDICAL GROUP PC
Mount Kisco, NY 10549

Reassigned Medicare billing, New York enrollment
Medicare enrollment name: Optum Medical Care PC
1,601 clinicians in this Medicare group

NPI 1982643003 (914) 241-1050

Northern Westchester Hospital Association

0.3 mi

Emergency Medicine

400 EAST MAIN STREET, 4TH FLOOR
Mount Kisco, NY 10549

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

NPI 1457789075 (914) 666-1200

North Shore-Lij Medical PC

28 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 25

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.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

1,198 services935 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.

1,095 services859 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

390 services372 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.

369 services276 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician 93015

An exercise or drug-induced heart stress test with ECG is a procedure performed by a doctor to assess how your heart responds to exertion. It involves monitoring your heart's electrical activity while you exercise or after medication is given to mimic exercise effects.

191 services186 patients

Blood test, comprehensive group of blood chemicals 80053

A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.

150 services137 patients

Blood test, lipids (cholesterol and triglycerides) 80061

A lipid panel is a blood test that measures fats and fatty substances, such as cholesterol and triglycerides. These substances are used by your body as a source of energy. High levels can lead to health issues, including heart disease.

132 services124 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

96 services93 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.

95 services83 patients

Heart rhythm review, and interpretation of continous external ekg over more than 48 hours up to 7 days 93244

A heart rhythm review involves monitoring your heart's electrical activity for more than 48 hours up to 7 days. Using a device called an external EKG, doctors can track your heartbeats to detect irregularities and help diagnose heart conditions.

67 services64 patients

Heart rhythm review and interpretation of continous external ekg over 8-15 days 93248

This service involves wearing a device for 8-15 days that continuously records your heart's electrical activity. It helps in identifying irregular heart rhythms. The recorded data is then reviewed and interpreted by a healthcare professional for any abnormalities.

66 services65 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.

57 services52 patients

Nuclear medicine studies of heart muscle at rest and with stress and spect 78452

Nuclear medicine studies of the heart involve two parts: rest and stress. During rest, images are taken of your heart at ease. During stress, images are taken after exercise or medication-induced stress. SPECT is a special imaging technique providing 3D pictures of your heart, helping identify any issues.

52 services52 patients

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

40 services39 patients

Natriuretic peptide (heart and blood vessel protein) level 83880

A natriuretic peptide level test is a blood test that helps doctors check for heart failure. It measures the amount of certain proteins that your heart and blood vessels produce when they are under stress. High levels may indicate heart disease.

40 services38 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician 93018

An exercise or drug-induced heart stress test with ECG is a procedure to assess how your heart functions under stress. It can involve exercising or medication to make your heart work harder while an ECG records its activity. A physician reviews the results.

39 services39 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician 93016

An exercise or drug-induced heart stress test with ECG involves monitoring your heart's activity while it's under stress, either from exercise or medication. A doctor supervises the entire procedure to ensure safety and accuracy in results. This test helps detect heart problems.

38 services38 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

34 services34 patients

Blood test, thyroid stimulating hormone (tsh) 84443

A TSH blood test measures the level of thyroid stimulating hormone in your body. This hormone is produced by the pituitary gland and regulates how your thyroid works. It's a simple procedure where a small amount of blood is drawn from your arm for analysis.

26 services24 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.

23 services23 patients

Electrocardiogram (ecg) 2-day continuous 93225

An Electrocardiogram (ECG) 2-day continuous is a non-invasive test that records the electrical activity of your heart over 48 hours. It helps to detect irregular heart rhythms, heart disease, or other cardiac conditions. You wear a portable device that records heart activity as you go about your daily activities.

18 services18 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.

18 services14 patients

Electrocardiogram (ecg) 2-day continuous with review by health care professional 93227

An Electrocardiogram (ECG) is a test that checks your heart's activity. The 2-day continuous ECG records your heart's rhythm non-stop for 48 hours. It helps to detect irregularities that may not occur during a shorter test. A healthcare professional will review the results to identify any issues.

17 services17 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.

15 services15 patients

Heart rhythm recording continous external ekg over more than 48 hours up to 7 days 93242

This procedure involves wearing a device, an external EKG, for up to 7 days to continuously monitor your heart rhythm. It helps detect irregularities that may not occur during a standard EKG. The device is non-invasive and safe.

11 services11 patients

Hospital Affiliations CMS Care Compare

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10549 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

$83.44 typical visit price

range $21.66 – $164.45

Typical copayment $20.86 (range $5.41 – $41.11)

Most-billed visit code 99213

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.

KIMBERLY ERIN CHU MD

Pathology (Anatomic Pathology & Clinical Pathology)

90 S BEDFORD RD, CAREMOUNT MEDICAL PC
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

PAUL D KANDEL MD

Internal Medicine

90 S BEDFORD RD, MOUNT KISCO MEDICAL GROUP PC
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

KAYLA MANCUSI RN

Registered Nurse (Women's Health Care, Ambulatory)

90 S BEDFORD RD
MOUNT KISCO, NY 10549

Westchester County (914) 242-1380

CORINNE MARIE REILLY PA

Physician Assistant

90 S BEDFORD RD
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

ALPHONSE AVERSA MD

Internal Medicine

90 S BEDFORD RD, CARE MOUNT MEDICAL RD
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

HENRY HERMAN JANSSEN JR. M.D.

Radiology (Diagnostic Radiology)

90 S BEDFORD RD
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

LARA K NAYOR NP

Nurse Practitioner (Family)

90 S BEDFORD RD
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

DR. RENE TALAI MD

Family Medicine

90 S BEDFORD RD
MOUNT KISCO, NY 10549

Westchester County (914) 242-1050

CRAIG S OSLEEB MD

Allergy & Immunology (Allergy)

90 S BEDFORD RD, MOUNT KISCO MEDICAL GROUP, PC
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

MARC A HERTZ MD

Radiology (Diagnostic Radiology)

90 S BEDFORD RD, CARE MOUNT MEDICAL, PC
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

JULIA SHOR M.D.

Internal Medicine (Gastroenterology)

90 S BEDFORD RD
MOUNT KISCO, NY 10549

Westchester County (914) 242-1370

ALYSSA DWECK MD

Obstetrics & Gynecology

90 S BEDFORD RD, CARE MOUNT MEDICAL , PC
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

DR. JIMMY WONG M.D.

Internal Medicine

90 S BEDFORD RD
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

MARGARET M LENCI MD

Internal Medicine (Rheumatology)

90 S BEDFORD RD, CARE MOUNT MEDICAL, PC
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

DR. DEBORAH L HILLMAN M.D.

Internal Medicine (Gastroenterology)

90 S BEDFORD RD, CARE MOUNT MEDICAL PC
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

BENJAMIN N ROSENBERG MD

Dermatology

90 S BEDFORD RD, MOUNT KISCO MEDICAL GROUP, PC
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

ROBERT A WOLFSON MD

Internal Medicine

90 S BEDFORD RD, CAREMOUNT MEDICAL, PC
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

MS. JENNIFER LORI SEVUSH-GARCY M.D.

Psychiatry & Neurology (Neurology)

90 S BEDFORD RD
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

ROSS S LEVY MD

Dermatology

90 S BEDFORD RD, CARE MOUNT MEDICAL , PC
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

KRISTINE ARBOLINO NP

Nurse Practitioner

90 S BEDFORD RD, CARE MOUNT MEDICAL PC
MOUNT KISCO, NY 10549

Westchester County (914) 241-1050

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 Mark Lieb's NPI number?

The NPI number for Mark Lieb is 1619921749. It was assigned to this individual provider in the NPPES registry on May 22, 2006.

Where is Mark Lieb located?

Mark Lieb practices at 90 S Bedford Rd Care Mount Medical PC, Mount Kisco, NY 10549. The listed phone number is (914) 241-1050.

What is Mark Lieb's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Mark Lieb enrolled in Medicare?

Yes. Mark Lieb 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 Mark Lieb's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Lieb reassigns Medicare benefits to 3 organizations: Optum Medical Care, P.C. (Mount Kisco, NY), Northern Westchester Hospital Association (Mount Kisco, NY) and North Shore-Lij Medical PC (Great Neck, 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 Mark Lieb's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Mark Lieb affiliated with any hospitals?

According to CMS data, Mark Lieb is affiliated with Northern Westchester Hospital.

When was this NPI record last updated?

The NPPES record for Mark Lieb was last updated on November 15, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.