KELLY E W ERNST FNP
NPI 1558695783
Nurse Practitioner - Family in South Portland, ME
About Kelly E W Ernst Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KELLY E W ERNST FNP (NPI 1558695783) is an individual family provider in South Portland, Maine, licensed in Maine (CNP111042) and active in the NPI registry since September 2009. She is enrolled in Medicare PECOS, is affiliated with Maine Medical Center, and is a graduate of Other (2009).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Other Identifiers 1
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
Kelly E W Ernst 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
3Medicare enrollment records show Kelly Ernst reassigns Medicare billing to 3 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
- 203 clinicians in this Medicare group
South Portland, ME 04106
- Reassigned Medicare billing, Maine enrollment
- Also billed through NPI 1346299815 (Maine)
- 3,140 clinicians in this Medicare group
Norway, ME 04268
- Reassigned Medicare billing, Maine enrollment
- Medicare enrollment name: Stephens Memorial Hospital Association
- 75 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 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Maine Medical Center
Acute Care Hospitals · Portland, MEMid Coast Hospital
Acute Care Hospitals · Brunswick, MEPhysician 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.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
SOUTH PORTLAND, ME 04106
SOUTH PORTLAND, ME 04106
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 Kelly Ernst's NPI number?
The NPI number for Kelly Ernst is 1558695783. It was assigned to this individual provider in the NPPES registry on September 21, 2009. The provider is also known as Kelly Welch.
Where is Kelly Ernst located?
Kelly Ernst practices at 100 Brickhill Ave, South Portland, ME 04106. The listed phone number is (207) 773-1728.
What is Kelly Ernst's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Kelly Ernst enrolled in Medicare?
Yes. Kelly Ernst 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 Kelly Ernst's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kelly Ernst reassigns Medicare benefits to 3 organizations: Maine Medical Partners (South Portland, ME), Mainehealth (South Portland, ME) and Mainehealth (Norway, 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 Kelly Ernst's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Kelly Ernst affiliated with any hospitals?
According to CMS data, Kelly Ernst is affiliated with Maine Medical Center and Mid Coast Hospital.
When was this NPI record last updated?
The NPPES record for Kelly Ernst was last updated on April 8, 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.
# Kelly E W Ernst, FNP · NPI 1558695783
Family physician in South Portland, Maine. Individual provider, active in the CMS NPPES registry since September 21, 2009.
## Identity
- **NPI:** 1558695783 (Entity type: Individual)
- **Enumerated:** September 21, 2009
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** CNP111042 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 BRICKHILL AVE, South Portland, ME 04106-1999
- **Phone:** (207) 773-1728 · **Fax:** (207) 772-4062
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Maine Medical Partners (NPI 1710215751, South Portland, ME); Mainehealth (NPI 1679887400, South Portland, ME); Mainehealth (NPI 1346299815, Norway, ME) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2009
## Record status
- **NPPES last updated:** April 8, 2014
- **Other identifiers:** Medicaid 1558695783 (ME)
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Source: [NPI Profile](https://npiprofile.com/npi/1558695783) · Data from the CMS NPPES public registry.