NPPES file of Aug 9, 2026

Mary Lynn Johnston, APRN

Adult Health Nurse Practitioner · New Haven, CT

Mary Lynn Johnston, APRN is an adult health nurse practitioner with a practice address in New Haven, Connecticut, and NPI 1841424801, issued on May 6, 2009. Check the license (Connecticut 002311, as entered in NPPES) with the Connecticut board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1841424801
Name
Mary Lynn Johnston
Credential
APRN
Primary taxonomy
Adult Health Nurse Practitioner 363LA2200X
License number
002311 CT
Self-reported in NPPES; status is on the state search
Practice location
800 Howard Ave, New Haven, CT 06519
Phone
(203) 785-4191
Enumerated
May 6, 2009
Record last updated
Jan 23, 2013 (not updated in 13 years: call before relying on the address or phone)
Fax
(203) 737-6014
Medicaid ID
008003990 CT
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest adult health nurse practitioner records → All 628 in Connecticut → Look up another NPI →

Also registered at 800 Howard Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

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  2. Edouard Aboian, M.D.Vascular Surgery Physician1588830566
  3. Lynn Acton, MSSpeech-Language Pathologist1205817889
  4. Joseph Agostini, MDGeriatric Medicine (Internal Medicine) Physician1104832146
  5. Nita Ahuja, M.D.Surgery Physician1093779308
  6. Christina Allen, MDSports Medicine (Orthopaedic Surgery) Physician1841242351

Verify Mary Lynn Johnston in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
    Search for license 002311    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Connecticut license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Mary Lynn Johnston among 628 adult health nurse practitioner records in Connecticut

Mary Lynn Johnston, APRN is one of 628 adult health nurse practitioner records with a practice address in Connecticut. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2009, is newer than 36% of them.

  • NPI issued2009 · 36% of these records are older, 59% newer
  • In a Medicare fileNo · 71% of these records are
  • In the CMS Doctors and Clinicians fileNo · 53% of these records are
  • Record last updated2013 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2200X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Adult Health Nurse Practitioner providers in Connecticut

There are 628 adult health nurse practitioner records in Connecticut. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 628 in Connecticut → Every provider in New Haven → Adult Health Nurse Practitioner nationwide →

The 8 adult health nurse practitioner records with the nearest ZIP codes

  1. Michelle Corso, APRN, MSNNew Haven, CT 065191063533792
  2. June Demarinis, APRNNew Haven, CT 065191932415049
  3. Nadia Fadli, NPNew Haven, CT 065191497029326
  4. Kathleen Frame, ANP-C, WHNP-BC, APRNNew Haven, CT 065191033490461
  5. Ceilia Gote, APRN, NPNew Haven, CT 065191386612786
  6. Jessica Johnson, APRNNew Haven, CT 065191730290537
  7. Sylvia Lempit, APRNNew Haven, CT 065191245564541
  8. Erin Medoff, APRNNew Haven, CT 065191083697536

Common questions

What is Mary Lynn Johnston, APRN's NPI number?

Mary Lynn Johnston, APRN's National Provider Identifier (NPI) is 1841424801, issued on May 6, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Mary Lynn Johnston, APRN located?

The NPPES record lists a practice address at 800 Howard Ave, New Haven, CT, 06519. Phone: (203) 785-4191. Providers update this record themselves, so call before visiting.

How can I verify Mary Lynn Johnston, APRN's license?

NPPES lists Connecticut license number 002311, as entered by the provider. Search the Connecticut 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.