Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. John Michael Granger, MD

Individual provider Hospitalist Physician · NPI 1467462630

Dr. John Michael Granger, MD is registered under Infectious Disease in Lancaster, Pennsylvania. Graduated from Medical College of Ohio in 2003, 23 years ago. Practices with Lancaster General Medical Group, a 582-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Delaware and Pennsylvania.

Years since qualifying
23
Trained at
Medical College of Ohio
Licensed in
DE, PA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2106 Harrisburg Pike Ste 301
Lancaster, PA 17604 Not confirmed with CMS for 15 years — call before visiting
Phone: (717) 544-3517
Fax: (717) 544-3520
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence MD436668 (PA)
Hospitalist Physician Taxonomy 208M00000X · Licence C10008084 (DE)

Record details

NPI number1467462630
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 9, 2006
Last updated in NPPESJune 28, 2011

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINFECTIOUS DISEASE
Also practisesINTERNAL MEDICINE
Medical schoolMEDICAL COLLEGE OF OHIO
Graduated 2003 (23 years in practice)
Group practice Lancaster General Medical Group — 582 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations16 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients328
Services billed 768 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Lancaster General Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 582 clinicians in the practice; 12 are shown here.

Other providers in Lancaster