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Mark Illfelder, DO
NPI 1568438869 · Internal Medicine Physician · York, PA
Mark Illfelder, DO is a Internal Medicine Physician provider in York, PA (NPI 1568438869).
Provider details
- NPI number
- 1568438869
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- OS003803L (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
1777 5th Ave
York, PA 17403-2632
Phone: (717) 843-8051
Fax: (717) 846-0721
Street-level locationGet directions
Mailing address
167 N Strathcona Dr
York, PA 17403-3830
Registry dates
- Enumerated
- 2006-02-27
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Illfelder's NPI number?
- Mark Illfelder's National Provider Identifier (NPI) is 1568438869, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Illfelder's specialty?
- Mark Illfelder is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Illfelder located?
- Mark Illfelder's practice location on file with NPPES is 1777 5th Ave, York, PA 17403-2632.
- What is Mark Illfelder's phone number?
- The practice phone number listed in the NPPES registry for Mark Illfelder is (717) 843-8051.
- Is Mark Illfelder's NPI active?
- Yes — Mark Illfelder's NPI (1568438869) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.