ADULT MEDICINE & GERIATRICS
NPI 1083858666
Internal Medicine in Allentown, PA
About Adult Medicine & Geriatrics NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ADULT MEDICINE & GERIATRICS (NPI 1083858666) is a healthcare organization registered as an internal medicine in Allentown, Pennsylvania and active in the NPI registry since April 2009. The organization lists Michael Callahan, Associate Executive Director Of Fin, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Adult Medicine & Geriatrics is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by February 28, 2027
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
2,887Medicare enrollment records show 2,887 clinicians reassign Medicare billing to Adult Medicine & Geriatrics, which bills Medicare for the services they deliver. Of these, 22 practice at this address and 1,826 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 66
Nearest to this location (20)
See all 2,887Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Lehigh Valley Physician Group's NPI number?
The NPI number for Lehigh Valley Physician Group is 1083858666. It was assigned to this organization in the NPPES registry on April 27, 2009. The provider is doing business as Adult Medicine & Geriatrics.
Where is Lehigh Valley Physician Group located?
Lehigh Valley Physician Group is located at 798 Hausman Rd Suite 270, Allentown, PA 18104. The listed phone number is (610) 871-2400.
What is Lehigh Valley Physician Group's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Lehigh Valley Physician Group enrolled in Medicare?
Yes. Lehigh Valley Physician Group is registered in the Medicare PECOS enrollment system.
When is Lehigh Valley Physician Group's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Pennsylvania, Clinic/Group Practice) is due for revalidation by February 28, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Lehigh Valley Physician Group?
According to the CMS Revalidation Reassignment List (October 2026 release), 2,887 clinicians in 66 Medicare specialties reassign their Medicare billing to Lehigh Valley Physician Group. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Nurse Practitioner (514), Internal Medicine (239) and Family Practice (233). Of these, 22 practice at this address and 1,826 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Lehigh Valley Physician Group was last updated on October 19, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Adult Medicine & Geriatrics · NPI 1083858666
Internal Medicine organization in Allentown, Pennsylvania. Organization record, active in the CMS NPPES registry since April 27, 2009.
## Identity
- **NPI:** 1083858666 (Entity type: Organization)
- **Enumerated:** April 27, 2009
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Legal business name:** Lehigh Valley Physician Group
- **Organization subpart:** Yes (part of Lehigh Valley Physician Group)
- **Authorized official:** Michael Callahan, ASSOCIATE EXECUTIVE DIRECTOR OF FIN
## Practice location
- **Address:** 798 HAUSMAN RD, SUITE 270, Allentown, PA 18104-9108
- **Phone:** (610) 871-2400 · **Fax:** (610) 871-5566
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** February 28, 2027 (Non-DME Part B, Pennsylvania, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 2,887 clinicians in 66 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (514), Internal Medicine (239), Family Practice (233); 22 practice at this address and 1,826 within 10 miles; [full list](https://npiprofile.com/npi/1083858666/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 19, 2010
- **Other identifiers:** Medicare PIN 740051 (PA)
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Source: [NPI Profile](https://npiprofile.com/npi/1083858666) · Data from the CMS NPPES public registry.