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MARK C. STILLMAN M.D.
NPI 1063490811
Emergency Medicine in Oceanside, NY

Active since January 03, 2006PECOS Enrolled
1 HEALTHY WAY, OCEANSIDE, NY 11572(516) 632-3900 Get Directions Write a Review

NPPES record last updated: September 13, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Mark C. Stillman M.d. NPPES

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

MARK C. STILLMAN M.D. (NPI 1063490811) is an individual emergency medicine provider in Oceanside, New York, licensed in New York (223749-1) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1063490811
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameMARK C. STILLMANCredential: M.D.
Location Address1 HEALTHY WAYOceanside, NY 11572-1551
Mailing AddressPo Box 409213Atlanta, GA 30384-9213 · (800) 377-8721 · Fax (304) 523-2241
Phone(516) 632-3900
Sole ProprietorYes
Enumeration DateJanuary 3, 2006
Last NPPES UpdateSeptember 13, 2007
✔ NPI 1063490811 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in NY · 223749-1
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
1 HEALTHY WAY, Oceanside, NY 11572
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Other Identifiers 1

Medicare PIN816V31

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark C. Stillman M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

2

Medicare enrollment records show Mark Stillman reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Optum Urgent Care, PLLC
11 mi
Urgent Care
555 N BROADWAY
Jericho, NY 11753
  • Reassigned Medicare billing, New York enrollment
  • 413 clinicians in this Medicare group
NPI 1285975797 (516) 622-6000
Optum Medical Care, P.C.
38 mi
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

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

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.
24 services24 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11572 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
$105.06 typical visit price
range $67.40 – $203.53
Typical copayment $26.26 (range $16.85 – $50.88)
Most-billed visit code 99203
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.

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.

Wrist hand orthosis, wrist extension control cock-up, non molded, prefabricated, off-the-shelf L3908
DME-Orthotic Devices · category DF000N
1 supplier13 claims13 services$56.33 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.

DR. BENJAMIN WALLBRUNN FELDER DO
Internal Medicine
1 HEALTHY WAY
OCEANSIDE, NY 11572
Nassau County (516) 632-3666
MANISH KUMAR MD
Pediatrics
1 HEALTHY WAY
OCEANSIDE, NY 11572
Nassau County (516) 632-3000
JANICE RANGEL CAMPBELL MSN, LCCE, IBCLC
Registered Nurse (Lactation Consultant)
1 HEALTHY WAY
OCEANSIDE, NY 11572
Nassau County (516) 632-4989
PARBATI KC FNP
Nurse Practitioner (Family)
1 HEALTHY WAY
OCEANSIDE, NY 11572
Nassau County (516) 632-3000
TARYN MCNEIL NP
Nurse Practitioner (Adult Health)
1 HEALTHY WAY
OCEANSIDE, NY 11572
Nassau County (516) 632-3000
DR. DAVID ELLIOT BERNSTEIN MD
Hospitalist
1 HEALTHY WAY
OCEANSIDE, NY 11572
Nassau County (516) 362-3000
STEPHANIE JOSEPH CRNA
Nurse Anesthetist, Certified Registered
1 HEALTHY WAY
OCEANSIDE, NY 11572
Nassau County (516) 632-3000
DR. JONATHAN MASHIEH DO
Student in an Organized Health Care Education/Training Program
1 HEALTHY WAY
OCEANSIDE, NY 11572
Nassau County (516) 632-3000

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 Stillman's NPI number?

The NPI number for Mark Stillman is 1063490811. It was assigned to this individual provider in the NPPES registry on January 3, 2006.

Where is Mark Stillman located?

Mark Stillman practices at 1 Healthy Way, Oceanside, NY 11572. The listed phone number is (516) 632-3900.

What is Mark Stillman's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Mark Stillman enrolled in Medicare?

Yes. Mark Stillman is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mark Stillman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Stillman reassigns Medicare benefits to 2 organizations: Optum Urgent Care, PLLC (Jericho, NY) and Optum Medical Care, P.C. (Mount Kisco, 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 Stillman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mark Stillman was last updated on September 13, 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.