National Provider Identifier
Mark J Vanviegen, ENP/FNP-BC
Mark J Vanviegen, ENP/FNP-BC is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner in Buffalo, NY and a listed phone number of (919) 426-1756.
Source: public NPPES record, last updated February 20, 2026. This profile is informational and is not medical advice, a quality rating, or a provider recommendation.
Profile Overview
- NPI
- 1477541779
- Provider Type
- Individual
- Primary Specialty
- Family Nurse Practitioner
- Enumeration Date
- October 11, 2005
- Last Updated
- February 20, 2026
Practice Location
- 266 Elmwood Ave Ste 428
- Buffalo, NY 14222-2202
Phone: (919) 426-1756
Mailing Address
- 266 Elmwood Ave
- Pmg 428
- Buffalo, NY 14222
Specialties
- Family Nurse Practitioner (363LF0000X)
- Acute Care Nurse Practitioner (363LA2100X)
- Family Nurse Practitioner (363LF0000X)
- Nurse Practitioner (363L00000X)
Browse Similar Providers
See more Family providers in Buffalo, NY.
Medicare Part B Activity
Reported 202 Medicare fee-for-service service lines in 2023.
Peer comparison
Compared to Nurse Practitioner providers in the Buffalo, NY metro area.
This provider is in the 61st percentile for Medicare service volume.
Around the middle of the peer group.
Performs 42% more Medicare services than the peer median.
Higher than 461 of 761 peers.
- Activity Percentile
- 60.6%
- Rank by Services
- 299 of 761
- Total Services
- 202
- Est. Allowed Value
- $19,692.73
- Dataset Year
- 2023
- Drug Code Share
- 0.0%
Estimated allowed value reflects Medicare fee-for-service allowed amounts only. It does not include Medicare Advantage, commercial insurance, cash-pay services, or employment compensation.
Peers are grouped by the broader Nurse Practitioner classification rather than the exact subspecialty label shown elsewhere on the page.
Percentile distribution
Each bar represents a 10-point percentile band of peers by total Medicare services for Nurse Practitioner across the Buffalo, NY metro area. Taller bars indicate higher service-volume bands. Highlighted bar marks this provider's percentile band.
Observed service range: 11 to 9,085 total Medicare services.
Top Clinical Services
- 99284: Emergency department visit with moderate level of medical decision making
86 services | $8,260.70
- 99285: Emergency department visit with high level of medical decision making
70 services | $9,907.82
- 99283: Emergency department visit with low level of medical decision making
24 services | $1,378.12
- 93010: Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only
22 services | $146.09
Full Record
- NPI
- 1477541779
- Entity Type
- Individual
- Last Name
- Vanviegen
- First Name
- Mark
- Middle Name
- J
- Credential
- ENP/FNP-BC
- Mailing Street Address
- 266 Elmwood Ave
- Mailing Address Line 2
- Pmg 428
- Mailing City
- Buffalo
- Mailing State
- NY
- Mailing ZIP Code
- 14222
- Mailing Country
- US
- Mailing Phone
- (919) 426-1756
- Practice Street Address
- 266 Elmwood Ave Ste 428
- Practice City
- Buffalo
- Practice State
- NY
- Practice ZIP Code
- 14222-2202
- Practice Country
- US
- Practice Phone
- (919) 426-1756
- Enumeration Date
- October 11, 2005
- Last Updated
- February 20, 2026
- Sex
- Male
- Sole Proprietor
- No
- Certification Date
- February 20, 2026
- updated_by_file
- npidata_pfile_20050523-20260308.csv
- Taxonomies
- Family Nurse Practitioner (363LF0000X), Acute Care Nurse Practitioner (363LA2100X), Family Nurse Practitioner (363LF0000X), Nurse Practitioner (363L00000X)
- Other Identifiers
- NP0297 (SC), P00398888 (NC, Railroad Medicare)