WESLEY P FAIRFIELD MD, ECNU
NPI 1437138955
Internal Medicine - Endocrinology, Diabetes & Metabolism in Portland, ME
About Wesley P Fairfield Md, Ecnu NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WESLEY P FAIRFIELD MD, ECNU (NPI 1437138955) is an individual endocrinology, diabetes & metabolism provider in Portland, Maine, licensed in Maine (015822) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, is affiliated with Northern Light Health, and is a graduate of Harvard Medical School (1995).
NPPES Registry Identity
Specialties & Licenses
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
Wesley P Fairfield Md, Ecnu 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 Wesley Fairfield reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Portland, ME 04102
- Reassigned Medicare billing, Maine enrollment
- 322 clinicians in this Medicare group
Lewiston, ME 04240
- Reassigned Medicare billing, Maine enrollment
- 920 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 4
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northern Light Health
Acute Care Hospitals · Portland, MEMid Coast Hospital
Acute Care Hospitals · Brunswick, MECentral Maine Medical Center
Acute Care Hospitals · Lewiston, MENorthern Light Eastern Maine Medical Center
Acute Care Hospitals · Bangor, MEMaine General Medical Center
Acute Care Hospitals · Augusta, MEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 04101 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Wesley Fairfield's NPI number?
The NPI number for Wesley Fairfield is 1437138955. It was assigned to this individual provider in the NPPES registry on January 12, 2006.
Where is Wesley Fairfield located?
Wesley Fairfield practices at 144 State St Fl 4, Portland, ME 04101. The listed phone number is (207) 400-8500.
What is Wesley Fairfield's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Wesley Fairfield enrolled in Medicare?
Yes. Wesley Fairfield 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 Wesley Fairfield's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Wesley Fairfield reassigns Medicare benefits to 2 organizations: Mercy Hospital (Portland, ME) and Central Maine Medical Center (Lewiston, 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 Wesley Fairfield's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Wesley Fairfield accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Wesley Fairfield 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.
Is Wesley Fairfield affiliated with any hospitals?
According to CMS data, Wesley Fairfield is affiliated with Northern Light Health, Mid Coast Hospital, Central Maine Medical Center, Northern Light Eastern Maine Medical Center and Maine General Medical Center.
When was this NPI record last updated?
The NPPES record for Wesley Fairfield was last updated on March 18, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Wesley P Fairfield, MD, ECNU · NPI 1437138955
Endocrinology, Diabetes & Metabolism physician in Portland, Maine. Individual provider, active in the CMS NPPES registry since January 12, 2006.
## Identity
- **NPI:** 1437138955 (Entity type: Individual)
- **Enumerated:** January 12, 2006
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** 015822 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 144 STATE ST FL 4, Portland, ME 04101-3776
- **Phone:** (207) 400-8500 · **Fax:** (207) 400-8508
## 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): Mercy Hospital (NPI 1629078712, Portland, ME); Central Maine Medical Center (NPI 1689653487, Lewiston, ME) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 1995
## Record status
- **NPPES last updated:** March 18, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1437138955) · Data from the CMS NPPES public registry.