MARY THERESA ANN LEWIS M.D.
NPI 1023215969
Otolaryngology in Lancaster, PA
About Mary Theresa Ann Lewis M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY THERESA ANN LEWIS M.D. (NPI 1023215969) is an individual otolaryngology provider in Lancaster, Pennsylvania, licensed in Pennsylvania (MD450120) and active in the NPI registry since July 2007. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mary Theresa Ann Lewis M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
5Medicare enrollment records show Mary Theresa Lewis reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lancaster, PA 17601
- Reassigned Medicare billing, Pennsylvania enrollment
- 727 clinicians in this Medicare group
Dushore, PA 18614
- Reassigned Medicare billing, Pennsylvania enrollment
- Medicare enrollment name: Guthrie Medical Group PC
- 830 clinicians in this Medicare group
Loveland, CO 80538
- Reassigned Medicare billing, Colorado enrollment
- 2,596 clinicians in this Medicare group
Pueblo, CO 81003
- Reassigned Medicare billing, Colorado enrollment
- 3 clinicians in this Medicare group
Steamboat Springs, CO 80487
- Reassigned Medicare billing, Colorado enrollment
- 181 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 17601 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LANCASTER, PA 17601
LANCASTER, PA 17601
LANCASTER, PA 17601
LANCASTER, PA 17601
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 Mary Theresa Lewis's NPI number?
The NPI number for Mary Theresa Lewis is 1023215969. It was assigned to this individual provider in the NPPES registry on July 2, 2007. The provider is also known as Mary Theresa Ann Adams MD.
Where is Mary Theresa Lewis located?
Mary Theresa Lewis practices at 2104 Harrisburg Pike Ste 200, Lancaster, PA 17601. The listed phone number is (717) 544-3626.
What is Mary Theresa Lewis's specialty?
The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.
Is Mary Theresa Lewis enrolled in Medicare?
Yes. Mary Theresa Lewis is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mary Theresa Lewis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Theresa Lewis reassigns Medicare benefits to 5 organizations: Lancaster General Medical Group (Lancaster, PA), Guthrie Medical Group, P.C. (Dushore, PA), Poudre Valley Medical Group, LLC (Loveland, CO), Greenwood Ear Nose & Throat Specialists PC (Pueblo, CO) and Yampa Valley Medical Center (Steamboat Springs, CO). Each 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 Mary Theresa Lewis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Theresa Lewis accept?
Health plans from Select Health list Mary Theresa Lewis as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Mary Theresa Lewis was last updated on April 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 months 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.
# Mary Theresa Ann Lewis, M.D. · NPI 1023215969
Otolaryngology physician in Lancaster, Pennsylvania. Individual provider, active in the CMS NPPES registry since July 2, 2007.
## Identity
- **NPI:** 1023215969 (Entity type: Individual)
- **Enumerated:** July 2, 2007
- **Primary specialty:** Otolaryngology · taxonomy 207Y00000X
- **State license:** MD450120 (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 2104 HARRISBURG PIKE STE 200, Lancaster, PA 17601-2644
- **Phone:** (717) 544-3626 · **Fax:** (717) 544-3628
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Lancaster General Medical Group (NPI 1700145406, Lancaster, PA); Guthrie Medical Group, P.C. (NPI 1487603965, Dushore, PA); Poudre Valley Medical Group, LLC (NPI 1366763260, Loveland, CO); Greenwood Ear Nose & Throat Specialists PC (NPI 1699842237, Pueblo, CO); Yampa Valley Medical Center (NPI 1437765732, Steamboat Springs, CO) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 24, 2025
---
Source: [NPI Profile](https://npiprofile.com/npi/1023215969) · Data from the CMS NPPES public registry.