1. Home
  2. Directory
  3. New York
  4. Buffalo
  5. Nurse Practitioner
  6. NPI Profile

MARK J VANVIEGEN ENP/FNP-BC
NPI 1477541779
Nurse Practitioner in Buffalo, NY

Active since October 11, 2005PECOS EnrolledAccepts Medicare Assignment
266 ELMWOOD AVE STE 428, BUFFALO, NY 14222(919) 426-1756 Get Directions Write a Review

NPPES record last updated: June 4, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 4, 2026, Apr 29, 2026, Apr 1, 2025 and 4 more (7 updates tracked since 2019).

About Mark J Vanviegen Enp/fnp-bc NPPES

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

MARK J VANVIEGEN ENP/FNP-BC (NPI 1477541779) is an individual nurse practitioner in Buffalo, New York, licensed in New York (F350568-01) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, is affiliated with Baptist Health Paducah, and is a graduate of Other (1999).

NPPES Registry Identity

NPI1477541779
Entity TypeIndividualMale
Primary Taxonomy363L00000X
Provider Legal NameMARK J VANVIEGENCredential: ENP/FNP-BC
Location Address266 ELMWOOD AVE STE 428Buffalo, NY 14222-2202
Mailing Address266 Elmwood Ave, Pmg 428Buffalo, NY 14222 · (919) 426-1756
Phone(919) 426-1756
Sole ProprietorNo
Medical School CMSOtherGraduated 1999
Enumeration DateOctober 11, 2005
Last NPPES UpdateJune 4, 20267 updates tracked since enumeration
NPPES CertifiedJune 4, 2026
✔ NPI 1477541779 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
Licenses✔ Licensed in NY · F350568-01✔ Licensed in NY · F350568✔ Licensed in KY · 4053567✔ Licensed in NC · 005002286✔ Licensed in CT · 14586
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Also ListedNurse Practitioner · Acute CareTaxonomy 363LA2100X · License NP3029682 (FL)
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License 149084 (NC), 4053567 (KY), RN10029872 (MA), 11846 (WI)
266 ELMWOOD AVE STE 428, Buffalo, NY 14222
Open in Google Maps ↗

Other Identifiers 2

MedicaidNP0297SC
OtherP00398888NC · Railroad Medicare

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health Maintenance Organization of Florida, Oscar Health Plan, Inc., WellSense Health Plan.Insurance ›

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 J Vanviegen Enp/fnp-bc 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 ID6406857465
PECOS Enrollment IDI20230111002406, I20250407001815, I20260408001893
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

9

Medicare enrollment records show Mark Vanviegen reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Buffalo Emergency Associates LLP
9.7 mi
Emergency Medicine
6653 MAIN ST
Williamsville, NY 14221
  • Reassigned Medicare billing, New York enrollment
  • 195 clinicians in this Medicare group
NPI 1508816521 (719) 204-4500
Physicians Medical Associates New York PC
139 mi
Emergency Medicine
301 PROSPECT AVE
Syracuse, NY 13203
  • Reassigned Medicare billing, New York enrollment
  • 235 clinicians in this Medicare group
NPI 1073386421 (315) 448-5111
Emergency Medical Association Of New York PC
279 mi
Emergency Medicine
1980 CROMPOND RD
Cortlandt Manor, NY 10567
  • Reassigned Medicare billing, New York enrollment
  • 33 clinicians in this Medicare group
NPI 1952356347 (954) 939-5000
Nyack Emergency Medical Association PLLC
284 mi
Emergency Medicine
160 N MIDLAND AVE
Nyack, NY 10960
  • Reassigned Medicare billing, New York enrollment
  • 85 clinicians in this Medicare group
NPI 1174627293 (954) 939-5000
Cep America LLC
314 mi
Emergency Medicine
56 FRANKLIN ST
Waterbury, CT 06706
  • Reassigned Medicare billing, Connecticut and Florida enrollments
  • Also billed through NPI 1043907033 (Florida)
  • 100 clinicians in this Medicare group
NPI 1700681202 (203) 709-6000
Vituity-Massachusetts PLLC
325 mi
Emergency Medicine
271 CAREW ST
Springfield, MA 01104
  • Reassigned Medicare billing, Massachusetts enrollment
  • 62 clinicians in this Medicare group
NPI 1083404313 (413) 748-9000
Kentucky Em-I Medical Services Psc
364 mi
Emergency Medicine
2201 LEXINGTON AVE
Ashland, KY 41101
  • Reassigned Medicare billing, Kentucky enrollment
  • 47 clinicians in this Medicare group
NPI 1356848121 (954) 939-5000
Acs Primary Care Physicians Louisiana PC
1,093 mi
Emergency Medicine
211 4TH ST
Alexandria, LA 71301
  • Reassigned Medicare billing, Louisiana enrollment
  • 178 clinicians in this Medicare group
NPI 1306889092 (318) 473-3000
Emergency Medicine Services Of Fl, LLC
1,169 mi
Emergency Medicine
20900 BISCAYNE BLVD
Aventura, FL 33180
  • Reassigned Medicare billing, Florida enrollment
  • 1,912 clinicians in this Medicare group
NPI 1043917180 (305) 682-7000

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 3

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
115 services115 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
108 services108 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
11 services11 patients

Hospital Affiliations CMS Care Compare

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

Baptist Health Paducah

Acute Care Hospitals · Paducah, KY
5/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number180104
Location2501 Kentucky AvenuePaducah, KY 42003 · Mc Cracken County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 14222 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
$84.93 typical visit price
range $54.87 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.08 typical visit price
range $17.54 – $136.14
Typical copayment $24.27 (range $4.38 – $34.03)
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.

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 Vanviegen's NPI number?

The NPI number for Mark Vanviegen is 1477541779. It was assigned to this individual provider in the NPPES registry on October 11, 2005.

Where is Mark Vanviegen located?

Mark Vanviegen practices at 266 Elmwood Ave Ste 428, Buffalo, NY 14222. The listed phone number is (919) 426-1756.

What is Mark Vanviegen's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Mark Vanviegen enrolled in Medicare?

Yes. Mark Vanviegen 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 Vanviegen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Vanviegen reassigns Medicare benefits to 9 organizations: Buffalo Emergency Associates LLP (Williamsville, NY), Physicians Medical Associates New York PC (Syracuse, NY), Emergency Medical Association Of New York PC (Cortlandt Manor, NY), Nyack Emergency Medical Association PLLC (Nyack, NY), Cep America LLC (Waterbury, CT) and 4 more organizations, listed in the Medicare section above. 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 Vanviegen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Vanviegen accept?

Health plans from Oscar Health Maintenance Organization of Florida, Oscar Health Plan, Inc. and WellSense Health Plan list Mark Vanviegen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Mark Vanviegen affiliated with any hospitals?

According to CMS data, Mark Vanviegen is affiliated with Baptist Health Paducah.

When was this NPI record last updated?

The NPPES record for Mark Vanviegen was last updated on June 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.