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MARGARET LIBBY NP-C
NPI 1619359007
Nurse Practitioner - Family in South Portland, ME

Active since June 23, 2015PECOS Enrolled
100 FODEN RD, SUITE 203, SOUTH PORTLAND, ME 04106(207) 874-1489(207) 523-8590 Get Directions Write a Review

NPPES record last updated: March 6, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 6, 2026, Dec 5, 2018 (2 updates tracked since 2018).

About Margaret Libby Np-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARGARET LIBBY NP-C (NPI 1619359007) is an individual family provider in South Portland, Maine, licensed in Maine (CNP151055) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS, is affiliated with Northern Light Health, and is a graduate of Other (2015).

NPPES Registry Identity

NPI1619359007
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameMARGARET LIBBYCredential: NP-C
Location Address100 FODEN RD, SUITE 203South Portland, ME 04106-2327
Mailing Address100 Gannett Dr, Suite CSouth Portland, ME 04106-5900 · (207) 347-2947 · Fax (207) 874-2317
Phone(207) 874-1489
Fax(207) 523-8590
Sole ProprietorNo
Medical School CMSOtherGraduated 2015
Enumeration DateJune 23, 2015
Last NPPES UpdateMarch 6, 20262 updates tracked since enumeration
NPPES CertifiedMarch 6, 2026
✔ NPI 1619359007 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in ME · CNP151055
100 FODEN RD, South Portland, ME 04106
Open in Google Maps ↗

Other Names 1

Former Name (1)Margaret Defanti

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Margaret Libby Np-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6800101155
PECOS Enrollment IDI20150814013350
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 3

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
74 services42 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
44 services39 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
20 services20 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northern Light Health

Acute Care Hospitals · Portland, ME
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number200008
Location144 State StreetPortland, ME 04101 · Cumberland County
Emergency services Birthing friendly

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.

New Patient
$86.72 typical visit price
range $56.28 – $169.96
Typical copayment $21.68 (range $14.07 – $42.49)
Most-billed visit code 99203
Established Patient
$99.18 typical visit price
range $18.22 – $138.92
Typical copayment $24.79 (range $4.55 – $34.73)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
1 supplier26 claims27 services$212.45 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. SARAH FUHRMAN FNP
Nurse Practitioner (Family)
100 FODEN RD, SUITE 203
SOUTH PORTLAND, ME 04106
Cumberland County (207) 874-1489
KATE A BUZZELL PT
Physical Therapist
100 FODEN RD, SUITE 103W
SOUTH PORTLAND, ME 04106
Cumberland County (207) 772-2625
RYAN A LUCAS A.T.C.
Specialist/Technologist (Athletic Trainer)
100 FODEN RD, SUITE 103 WEST
SOUTH PORTLAND, ME 04106
Cumberland County (207) 772-2625
DALANI ROY ATC
Specialist/Technologist (Athletic Trainer)
100 FODEN RD
SOUTH PORTLAND, ME 04106
Cumberland County (207) 774-5816
DR. MAURA FOX DO
Family Medicine
100 FODEN RD
SOUTH PORTLAND, ME 04106
Cumberland County (207) 774-5816
LENORA L DOLEWA PT
Physical Therapist
100 FODEN RD, SUITE 103W
SOUTH PORTLAND, ME 04106
Cumberland County (207) 772-2625
CINDY ASBJORNSEN DO LLC
Family Medicine
100 FODEN RD, SUITE 307 W
SOUTH PORTLAND, ME 04106
Cumberland County (207) 221-3919
LIANA HOBGOOD
Specialist/Technologist (Athletic Trainer)
100 FODEN RD, SUITE 205
SOUTH PORTLAND, ME 04106
Cumberland County (207) 780-8860

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 Margaret Libby's NPI number?

The NPI number for Margaret Libby is 1619359007. It was assigned to this individual provider in the NPPES registry on June 23, 2015. The provider is also known as Margaret Defanti.

Where is Margaret Libby located?

Margaret Libby practices at 100 Foden Rd Suite 203, South Portland, ME 04106. The listed phone number is (207) 874-1489.

What is Margaret Libby's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Margaret Libby enrolled in Medicare?

Yes. Margaret Libby is registered in the Medicare PECOS enrollment system.

Is Margaret Libby affiliated with any hospitals?

According to CMS data, Margaret Libby is affiliated with Northern Light Health.

When was this NPI record last updated?

The NPPES record for Margaret Libby was last updated on March 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.