CATHERINE M LYDEN FNP
NPI 1841553872
Nurse Practitioner - Family in South Portland, ME
About Catherine M Lyden Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CATHERINE M LYDEN FNP (NPI 1841553872) is an individual family provider in South Portland, Maine, licensed in Maine (CNP121026) and active in the NPI registry since June 2012. She is enrolled in Medicare PECOS, maintains a secondary practice location in Scarborough, and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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 and accepts Medicare assignment
Catherine M Lyden Fnp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Catherine Lyden reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
South Portland, ME 04106
- Reassigned Medicare billing, Maine enrollment
- 40 clinicians in this Medicare group
Scarborough, ME 04074
- Reassigned Medicare billing, Maine enrollment
- 188 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 04106 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.
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 Catherine Lyden's NPI number?
The NPI number for Catherine Lyden is 1841553872. It was assigned to this individual provider in the NPPES registry on June 25, 2012.
Where is Catherine Lyden located?
Catherine Lyden practices at 100 Foden Rd # 103, South Portland, ME 04106. The listed phone number is (207) 828-1122.
What is Catherine Lyden's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Catherine Lyden enrolled in Medicare?
Yes. Catherine Lyden is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Catherine Lyden's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Lyden reassigns Medicare benefits to 2 organizations: Chest Medicine Associates, PA (South Portland, ME) and Maine Medical Partners (Scarborough, ME). 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 Catherine Lyden's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Catherine Lyden accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Catherine Lyden 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 Catherine Lyden was last updated on March 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Catherine M Lyden, FNP · NPI 1841553872
Family physician in South Portland, Maine. Individual provider, active in the CMS NPPES registry since June 25, 2012.
## Identity
- **NPI:** 1841553872 (Entity type: Individual)
- **Enumerated:** June 25, 2012
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** CNP121026 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 FODEN RD # 103, South Portland, ME 04106-2327
- **Phone:** (207) 828-1122 · **Fax:** (207) 828-0188
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Chest Medicine Associates, PA (NPI 1437255247, South Portland, ME); Maine Medical Partners (NPI 1659351393, Scarborough, ME) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** March 24, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1841553872) · Data from the CMS NPPES public registry.