Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr John J. Mark and Dr Judith L. Mark LLP

Organization Family Medicine Physician · NPI 1285948752

Dr John J. Mark and Dr Judith L. Mark LLP is a Family Medicine Physician in North Merrick, New York. Licensed in New York. Registered with an NPI since 2010.

Licensed in
NY
In the registry since
2010
What do these letters mean?
LLP — Limited liability partnership
A form of business registration, not a clinical qualification.

See every abbreviation used in this directory →

Practice location Address checks out

951 Merrick Ave
North Merrick, NY 11566-1001
Phone: (516) 489-6433
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 147046 (NY)

Record details

NPI number1285948752
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Nancy Skelton — Biller · (516) 997-0876
NPI enumeratedJuly 27, 2010
Last updated in NPPESJuly 27, 2010
Mailing address951 Merrick Ave, North Merrick, NY 11566-1001