John Wallendjack, MD
NPI 1780776377 · Internal Medicine Physician · Harrisburg, PA
John Wallendjack, MD is a Internal Medicine Physician provider in Harrisburg, PA (NPI 1780776377).
Provider details
- NPI number
- 1780776377
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MDO19773E (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
Mailing address
Registry dates
- Enumerated
- 2006-09-29
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Wallendjack's NPI number?
- John Wallendjack's National Provider Identifier (NPI) is 1780776377, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Wallendjack's specialty?
- John Wallendjack is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Wallendjack located?
- John Wallendjack's practice location on file with NPPES is 3721 Tecport Drive, Harrisburg, PA 17106-7103.
- What is John Wallendjack's phone number?
- The practice phone number listed in the NPPES registry for John Wallendjack is (717) 540-6774.
- Is John Wallendjack's NPI active?
- Yes — John Wallendjack's NPI (1780776377) 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.