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

Mark A Illfelder, DO

Individual provider Internal Medicine Physician · NPI 1568438869

Mark A Illfelder, DO is an Internal Medicine Physician in York, Pennsylvania. Licensed in Pennsylvania. Registered with an NPI since 2006.

Licensed in
PA
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1777 5th Ave
York, PA 17403-2632
Phone: (717) 843-8051
Fax: (717) 846-0721
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence OS003803L (PA)

Record details

NPI number1568438869
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedFebruary 27, 2006
Last updated in NPPESJuly 8, 2007
Mailing address167 N Strathcona Dr, York, PA 17403-3830

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