DR. MARK MATIASH MD
NPI 1689661563
Anesthesiology in Nyack, NY

Q: What is Mark Matiash's NPI number?

The NPI number for Mark Matiash is 1689661563. It was assigned to this individual provider in the NPPES registry on October 5, 2005.

Q: What is Mark Matiash's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Q: When was this NPI record last updated?

The NPPES record for Mark Matiash was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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 October 05, 2005PECOS EnrolledAccepts Medicare Assignment

160 N MIDLAND AVE, NYACK HOSPITAL, NYACK, NY 10960(845) 348-2862 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Mark Matiash Md NPPES

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

DR. MARK MATIASH MD (NPI 1689661563) is an individual anesthesiology provider in Nyack, New York, licensed in New York (216183) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, is affiliated with Nyack Hospital, and is a graduate of State University Of New York At Stony Brook, School Of Medicine (1998).

NPPES Registry Identity

NPI1689661563

Entity TypeIndividualMale

Primary Taxonomy207L00000X

Provider Legal NameDR. MARK MATIASHCredential: MD

Location Address160 N MIDLAND AVE, NYACK HOSPITALNyack, NY 10960-1912

Mailing Address43 Kensico Dr, 2nd FloorMount Kisco, NY 10549-1009 · (914) 666-8866 · Fax (914) 666-6777

Phone(845) 348-2862

Sole ProprietorNo

Medical School CMSState University Of New York At Stony Brook, School Of MedicineGraduated 1998

Enumeration DateOctober 5, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1689661563 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

License✔ Licensed in NY · 216183

Definition

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

160 N MIDLAND AVE, Nyack, NY 10960

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Other Identifiers 1

Medicaid02270735NY

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

Dr. Mark Matiash 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 ID5890831028

PECOS Enrollment IDI20110729000213

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

North Shore - Lij Anesthesiology, PC

11 mi

Anesthesiology

480 BEDFORD RD BLDG B
Chappaqua, NY 10514

Reassigned Medicare billing, New York enrollment
1,406 clinicians in this Medicare group

NPI 1417401266 (914) 666-8866

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 4

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.

Anesthesia for lens surgery 00142

Anesthesia for lens surgery involves administering medication to numb the eye area, ensuring you feel no pain during the procedure. This can be a local anesthetic (numbing only the eye area) or general (where you're asleep). It helps make the surgery comfortable and stress-free.

154 services145 patients

Anesthesia for other procedure on eye 00140

Anesthesia for an eye procedure involves administering medication to numb your eye and surrounding area, ensuring you feel no pain during the operation. It can be local (only the eye area) or general (whole body). It's safe and helps make the procedure comfortable.

25 services23 patients

Anesthesia for other procedure on large bowel using an endoscope 00811

Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.

17 services17 patients

Anesthesia for procedure on small and large bowel using an endoscope 00813

Anesthesia for an endoscopic procedure on the small and large bowel ensures comfort and relaxation during the procedure. It involves administering medicine to help you sleep or feel drowsy. This allows the doctor to examine your bowels without causing you discomfort or pain.

14 services14 patients

Hospital Affiliations CMS Care Compare

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

Nyack Hospital

Acute Care Hospitals · Nyack, NY

2/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number330104

Location160 North Midland AvenueNyack, NY 10960 · Rockland County

Birthing friendly

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.

KRISTINE M. RIVERA CRNA

Nurse Anesthetist, Certified Registered

160 N MIDLAND AVE, NYACK HOSPITAL
NYACK, NY 10960

Rockland County (845) 348-2862

PREM S. MEHTA MD

Anesthesiology

160 N MIDLAND AVE, NYACK HOSPITAL
NYACK, NY 10960

Rockland County (845) 348-2862

PAMELA CHARNEY MD

Internal Medicine

160 N MIDLAND AVE, ADULT HOSPITAL MEDICINE, NYACK HOSPITAL
NYACK, NY 10960

Rockland County (845) 348-2000

ZENA JUSTICE CRNA

Nurse Anesthetist, Certified Registered

160 N MIDLAND AVE, NYACK HOSPITAL
NYACK, NY 10960

Rockland County (845) 348-2862

DR. BORIS MELNIKAU M.D.

Internal Medicine

160 N MIDLAND AVE
NYACK, NY 10960

Rockland County (845) 348-8884

MONA PEREZ N.P.

Nurse Practitioner

160 N MIDLAND AVE, NYACK HOSPITAL
NYACK, NY 10960

Rockland County (845) 348-2345

DR. JAE HO LEE MD

Anesthesiology

160 N MIDLAND AVE, NYACK HOSPITAL
NYACK, NY 10960

Rockland County (914) 666-8866

MR. JAYESH SAMPAT M.D.

Internal Medicine

160 N MIDLAND AVE
NYACK, NY 10960

Rockland County (845) 348-2000

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 Matiash's NPI number?

The NPI number for Mark Matiash is 1689661563. It was assigned to this individual provider in the NPPES registry on October 5, 2005.

Where is Mark Matiash located?

Mark Matiash practices at 160 N Midland Ave Nyack Hospital, Nyack, NY 10960. The listed phone number is (845) 348-2862.

What is Mark Matiash's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Mark Matiash enrolled in Medicare?

Yes. Mark Matiash 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 organization bills Medicare for Mark Matiash's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Matiash reassigns Medicare benefits to North Shore - Lij Anesthesiology, PC (Chappaqua, 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 Mark Matiash's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Mark Matiash affiliated with any hospitals?

According to CMS data, Mark Matiash is affiliated with Nyack Hospital.

When was this NPI record last updated?

The NPPES record for Mark Matiash was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.