Mark Ennis, RN
Registered Nurse · Portland, ME
Mark Ennis, RN is a registered nurse with a practice address in Portland, Maine, and NPI 1780466516, issued on Oct 17, 2023. Check the license (Maine RN84251, as entered in NPPES) with the Maine board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Ennis
- Credential
- RN
- Primary taxonomy
- Registered Nurse 163W00000X
- License number
- RN84251 ME
Self-reported in NPPES; status is on the state search - Practice location
- 180 Park Ave, Portland, ME 04102
- Phone
- (207) 874-2141
- Enumerated
- Oct 17, 2023
- Record last updated
- Oct 17, 2023
- Entity
- Type 1 · individual
Also registered at 180 Park Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Ennis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license RN84251Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87 registered nurse records list a practice address in Portland
They are 87 of the 6,022 NPPES records with a practice address in Portland, and 612 registered nurse records in Maine. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 87 in Portland → All 612 in Maine → Every provider in Portland →
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- Annette Albis, REGISTERED NURSEBenton, ME1730794413
- Jasmine AliHoulton, ME1225864267
- Megan Allen, RNAugusta, ME1558891853
- Angela AndersonPatten, ME1285043869
- Katherine Anderson, RNPortland, ME1780351957
- Lindsey Anderson, RNLewiston, ME1730767062
Common questions
What is Mark Ennis, RN's NPI number?
Mark Ennis, RN's National Provider Identifier (NPI) is 1780466516, issued on Oct 17, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Mark Ennis, RN located?
The NPPES record lists a practice address at 180 Park Ave, Portland, ME, 04102. Phone: (207) 874-2141. Providers update this record themselves, so call before visiting.
How can I verify Mark Ennis, RN's license?
NPPES lists Maine license number RN84251, as entered by the provider. Search the Maine board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.