MASS LUNG & ALLERGY, PC.
NPI 1679734545
Internal Medicine - Pulmonary Disease in Leominster, MA
About Mass Lung & Allergy, Pc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MASS LUNG & ALLERGY, PC. (NPI 1679734545) is a healthcare organization registered as a pulmonary disease in Leominster, Massachusetts and active in the NPI registry since June 2008. The organization lists Payam Aghassi, Owner Physician, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 5
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)
Mass Lung & Allergy, Pc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by November 30, 2026
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
18Medicare enrollment records show 18 clinicians reassign Medicare billing to Mass Lung & Allergy, PC., which bills Medicare for the services they deliver. Of these, 6 practice at this address and 10 within 10 miles. They are listed nearest first.
Clinicians by Medicare Specialty 4
Clinicians, nearest first (18)
Worcester, MA 01655
Source: 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 Mass Lung & Allergy, PC.'s NPI number?
The NPI number for Mass Lung & Allergy, PC. is 1679734545. It was assigned to this organization in the NPPES registry on June 23, 2008.
Where is Mass Lung & Allergy, PC. located?
Mass Lung & Allergy, PC. is located at 100 Hospital Rd Suite 2A, Leominster, MA 01453. The listed phone number is (978) 466-2692.
What is Mass Lung & Allergy, PC.'s specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is Mass Lung & Allergy, PC. enrolled in Medicare?
Yes. Mass Lung & Allergy, PC. is registered in the Medicare PECOS enrollment system.
When is Mass Lung & Allergy, PC.'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 (Massachusetts, Independent Diagnostic Testing Facility (IDTF)) is due for revalidation by November 30, 2026. 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 Mass Lung & Allergy, PC.?
According to the CMS Revalidation Reassignment List (October 2026 release), 18 clinicians in 4 Medicare specialties reassign their Medicare billing to Mass Lung & Allergy, PC.. 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 Pulmonary Disease (9), Nurse Practitioner (6) and Internal Medicine (2). Of these, 6 practice at this address and 10 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 Mass Lung & Allergy, PC. was last updated on January 22, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Mass Lung & Allergy, Pc. · NPI 1679734545
Pulmonary Disease organization in Leominster, Massachusetts. Organization record, active in the CMS NPPES registry since June 23, 2008.
## Identity
- **NPI:** 1679734545 (Entity type: Organization)
- **Enumerated:** June 23, 2008
- **Primary specialty:** Internal Medicine - Pulmonary Disease · taxonomy 207RP1001X
- **Organization subpart:** Yes (part of Mass Lung & Allergy, P.c.)
- **Authorized official:** Payam Aghassi, OWNER PHYSICIAN
## Practice location
- **Address:** 100 HOSPITAL RD, SUITE 2A, Leominster, MA 01453-2253
- **Phone:** (978) 466-2692 · **Fax:** (978) 466-4754
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** November 30, 2026 (Non-DME Part B, Massachusetts, Independent Diagnostic Testing Facility (IDTF)) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 18 clinicians in 4 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Pulmonary Disease (9), Nurse Practitioner (6), Internal Medicine (2); 6 practice at this address and 10 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 22, 2014
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Source: [NPI Profile](https://npiprofile.com/npi/1679734545) · Data from the CMS NPPES public registry.