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STEPHEN KOPF MD
NPI 1164401345
Internal Medicine - Cardiovascular Disease in Ossining, NY

Active since January 16, 2006PECOS EnrolledAccepts Medicare AssignmentCLIA 33D0861333 · Waiver
43 SOUTH HIGHLAND AVENUE, OSSINING, NY 10562(914) 941-0570(914) 941-0778 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Stephen Kopf Md NPPES

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

STEPHEN KOPF MD (NPI 1164401345) is an individual cardiovascular disease provider in Ossining, New York, licensed in New York (128345-1) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through August 31, 2026, and is affiliated with Phelps Hospital.

NPPES Registry Identity

NPI1164401345
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameSTEPHEN KOPFCredential: MD
Location Address43 SOUTH HIGHLAND AVENUEOssining, NY 10562-5226
Mailing Address43 South Highland AvenueOssining, NY 10562-5226 · (914) 941-0570 · Fax (914) 941-0778
Phone(914) 941-0570
Fax(914) 941-0778
Sole ProprietorYes
Medical School CMSVirginia Commonwealth University, School Of MedicineGraduated 1973
Enumeration DateJanuary 16, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1164401345 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 · 128345-1
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.
43 SOUTH HIGHLAND AVENUE, Ossining, NY 10562
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Other Identifiers 3

Medicare UPINB12765
Medicaid00460302NY
Medicare ID-Type Unspecified313201NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Stephen Kopf 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 ID9032399746
PECOS Enrollment IDI20110214000341
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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 33D0861333

Stephen W Kopf MD · Ossining, NY
Active · expires Aug 31, 2026
CLIA Number33D0861333
Laboratory TypePhysician Office
Certificate Effective DateSeptember 1, 2024
Certificate Expiration DateAugust 31, 2026
Laboratory DirectorStephen W. Kopf
Laboratory Phone(914) 941-0570
Laboratory LocationStephen W Kopf MD43 So Highland Ave, Ossining, NY 10562
CLIA data matches this NPI record on: Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 8

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 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.
135 services50 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.
65 services41 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.
62 services45 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.
42 services41 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.
25 services25 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.
24 services23 patients

Hospital Affiliations CMS Care Compare

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

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10562 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.

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.

Reported Quality Measures

Atrial Fibrillation and Atrial Flutter: Chronic Anticoagulation Therapy
Percentage of patients aged 18 years and older with nonvalvular atrial fibrillation (AF) or atrial flutter who were prescribed warfarin OR another FDA- approved anticoagulant drug for the prevention of thromboembolism during the measurement period
68%25 patients3/55-star benchmark: 100%
Coronary Artery Disease (CAD): Antiplatelet Therapy
Percentage of patients aged 18 years and older with a diagnosis of coronary artery disease (CAD) seen within a 12 month period who were prescribed aspirin or clopidogrel
85%40 patients3/55-star benchmark: 100%
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.
98%924 patients4/55-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.
98%1,085 patients4/55-star benchmark: 100%
Ischemic Vascular Disease (IVD): Use of Aspirin or Another Antiplatelet
Percentage of patients 18 years of age and older who were diagnosed with acute myocardial infarction (AMI), coronary artery bypass graft (CABG) or percutaneous coronary interventions (PCI) in the 12 months prior to the measurement period, or who had an active…
66%53 patients3/55-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.
2%285 patients1/55-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…
0%285 patients1/55-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…
0%285 patients1/55-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.

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 Stephen Kopf's NPI number?

The NPI number for Stephen Kopf is 1164401345. It was assigned to this individual provider in the NPPES registry on January 16, 2006.

Where is Stephen Kopf located?

Stephen Kopf practices at 43 South Highland Avenue, Ossining, NY 10562. The listed phone number is (914) 941-0570.

What is Stephen Kopf's specialty?

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

Is Stephen Kopf enrolled in Medicare?

Yes. Stephen Kopf 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.

Does Stephen Kopf hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 33D0861333) is associated with this NPI, valid through August 31, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

Is Stephen Kopf affiliated with any hospitals?

According to CMS data, Stephen Kopf is affiliated with Phelps Hospital.

When was this NPI record last updated?

The NPPES record for Stephen Kopf was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.