DR. STEPHEN WARSHAFSKY M.D.
NPI 1598846073
Internal Medicine in Ardsley, NY

Q: What is Stephen Warshafsky's NPI number?

The NPI number for Stephen Warshafsky is 1598846073. It was assigned to this individual provider in the NPPES registry on October 18, 2006.

Q: What is Stephen Warshafsky's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Active since October 18, 2006PECOS Enrolled

1055 SAW MILL RIVER RD, SUITE 206, ARDSLEY, NY 10502(914) 591-0733(914) 591-2213 Get Directions Write a Review

NPPES record last updated: January 27, 2009. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Stephen Warshafsky M.d. NPPES

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

DR. STEPHEN WARSHAFSKY M.D. (NPI 1598846073) is an individual internal medicine provider in Ardsley, New York, licensed in New York (60188090) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with St John's Riverside Hospital, and is a graduate of New York Medical College (1989).

NPPES Registry Identity

NPI1598846073

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. STEPHEN WARSHAFSKYCredential: M.D.

Location Address1055 SAW MILL RIVER RD, SUITE 206Ardsley, NY 10502-1050

Mailing Address1055 Saw Mill River Rd, Suite 206Ardsley, NY 10502-1050 · (914) 591-0733 · Fax (914) 591-2213

Phone(914) 591-0733

Fax(914) 591-2213

Sole ProprietorYes

Medical School CMSNew York Medical CollegeGraduated 1989

Enumeration DateOctober 18, 2006

Last NPPES UpdateJanuary 27, 2009

✔ NPI 1598846073 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in NY · 60188090

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

1055 SAW MILL RIVER RD, Ardsley, NY 10502

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Other Identifiers 11

Other126AQ1NY · Empire Bcbs

OtherWP415NY · Oxford Healthcare

Medicare PIN91K421NY

Other3C8953NY · Healthnet

Medicare ID-Type UnspecifiedP00127809NY · Railroad Medicare

Other2164178NY · Cigna Healthcare

Other327702NY · Mvp Healthcare Insurance

Other562346187NY · United Healthcare

Other562346187NY · Aetna

Medicare UPINF38833NY

Other2593193NY · Ghi

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Stephen Warshafsky M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2264344621

PECOS Enrollment IDI20081030000260

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 Stephen Warshafsky reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Stephen Warshafsky MD Internal Medicine PLLC

Same address

Internal Medicine

1055 SAW MILL RIVER RD, SUITE 206
Ardsley, NY 10502

Reassigned Medicare billing, New York enrollment

NPI 1780816918 (914) 591-0733

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 13

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.

Complex chronic care management services for two or more chronic conditions, each additional 60 minutes of clinical staff time directed by health care professional, per calendar month 99489

Complex chronic care management is a service for patients with multiple chronic conditions. It involves an additional 60 minutes per month of clinical staff time directed by a healthcare professional. This service assists in managing your health conditions effectively.

1,805 services131 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.

625 services149 patients

Complex chronic care management services for two or more chronic conditions, first 60 minutes of clinical staff time directed by health care professional, per calendar month 99487

Complex chronic care management is a service for patients with two or more long-term health conditions. It involves a healthcare professional directing clinical staff in providing care for the first 60 minutes each month. This helps manage your health conditions effectively.

589 services140 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.

379 services122 patients

Chronic care management services for two or more chronic conditions, first 30 minutes provided personally by health care professional, per calendar month 99491

Chronic care management services involve a healthcare professional personally providing care for patients with two or more chronic conditions. This service, offered monthly, focuses on the first 30 minutes of care, helping manage and coordinate the patient's health needs.

332 services144 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

130 services15 patients

Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg J3420

This is a procedure where a small dose of Vitamin B-12, also known as Cyanocobalamin, is injected into your body. This vitamin is essential for nerve function and the production of red blood cells. It's often used to treat vitamin B-12 deficiency.

130 services15 patients

Chronic care management services for two or more chronic conditions, additional 30 minutes provided personally by health care professional, per calendar month 99437

Chronic care management services involve regular check-ups, medication management, and health guidance for patients with two or more long-term health conditions. This specific service provides an additional 30 minutes of personal attention from a healthcare professional each month.

111 services81 patients

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490

Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.

84 services62 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

62 services62 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 services35 patients

Transitional care management services for problem of high complexity 99496

Transitional care management services are designed to ensure a smooth transition from a hospital to home or another care setting for patients with complex health issues. These services include medication management, patient education, and coordination with healthcare providers.

49 services33 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.

12 services12 patients

Hospital Affiliations CMS Care Compare 4

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

St John's Riverside Hospital

Acute Care Hospitals · Yonkers, NY

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330208

Location976 North BroadwayYonkers, NY 10701 · Westchester County

Emergency services Birthing friendly

Westchester Medical Center

Acute Care Hospitals · Valhalla, NY

1/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number330234

Location100 Woods RdValhalla, NY 10595 · 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

White Plains Hospital Center

Acute Care Hospitals · White Plains, NY

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330304

Location41 East Post R0adWhite Plains, NY 10601 · Westchester County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10502 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.

Reported Quality Measures

Colorectal Cancer Screening

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

3%309 patients1/55-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%2,741 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.

61%1,192 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.

96%668 patients4/55-star benchmark: 100%

Pneumococcal Vaccination Status for Older Adults

Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine

51%221 patients3/55-star benchmark: 95%

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…

38%521 patients2/55-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

0%481 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…

73%339 patients3/55-star benchmark: 100%

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.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

7 suppliers12 claims23 services$6.70 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

PREMIER PHYSICIANS AND SURGEONS, PLLC

Otolaryngology

1055 SAW MILL RIVER RD, SUITE 101
ARDSLEY, NY 10502

Westchester County (914) 693-7636

H D REDDY MD

Internal Medicine

1055 SAW MILL RIVER RD, 211
ARDSLEY, NY 10502

Westchester County (914) 693-3633

ENT PHYSICIANS AND SURGEONS, LLP

Otolaryngology (Otology & Neurotology)

1055 SAW MILL RIVER RD, SUITE 101
ARDSLEY, NY 10502

Westchester County (914) 693-7636

ENT FACULTY PRACTICE LLP

Otolaryngology (Otolaryngology/Facial Plastic Surgery)

1055 SAW MILL RIVER RD, SUITE 101
ARDSLEY, NY 10502

Westchester County (914) 693-7636

ALEXANDRA KAPLAN CORWIN

Dietitian, Registered

1055 SAW MILL RIVER RD, SUITE 208
ARDSLEY, NY 10502

Westchester County (914) 693-7191

DR. STEVEN A HEMMERDINGER M.D.

Otolaryngology (Sleep Medicine)

1055 SAW MILL RIVER RD, SUITE 101
ARDSLEY, NY 10502

Westchester County (914) 693-7636

CRAIG ELLIOT BERZOFSKY MD

Otolaryngology

1055 SAW MILL RIVER RD, SUITE 101
ARDSLEY, NY 10502

Westchester County (914) 693-7636

CRAIG H ZALVAN, MD PC

Otolaryngology

1055 SAW MILL RIVER RD, SUITE 101
ARDSLEY, NY 10502

Westchester County (914) 693-7636

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 Warshafsky's NPI number?

The NPI number for Stephen Warshafsky is 1598846073. It was assigned to this individual provider in the NPPES registry on October 18, 2006.

Where is Stephen Warshafsky located?

Stephen Warshafsky practices at 1055 Saw Mill River Rd Suite 206, Ardsley, NY 10502. The listed phone number is (914) 591-0733.

What is Stephen Warshafsky's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Stephen Warshafsky enrolled in Medicare?

Yes. Stephen Warshafsky is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Stephen Warshafsky's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Warshafsky reassigns Medicare benefits to Stephen Warshafsky MD Internal Medicine PLLC (Ardsley, 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 Stephen Warshafsky's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Stephen Warshafsky affiliated with any hospitals?

According to CMS data, Stephen Warshafsky is affiliated with St John's Riverside Hospital, Westchester Medical Center, Phelps Hospital and White Plains Hospital Center.

When was this NPI record last updated?

The NPPES record for Stephen Warshafsky was last updated on January 27, 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.