Steven Guichelaar, NP
Psychiatric/Mental Health Nurse Practitioner · North Haven, CT
Steven Guichelaar, NP is a psychiatric/mental health nurse practitioner with a practice address in North Haven, Connecticut, and NPI 1427476811, issued on Apr 2, 2014. Check the license (Connecticut 12.013275, as entered in NPPES) with the Connecticut board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Steven Guichelaar
- Credential
- NP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- 12.013275 CT
APRN11032714 FL
GAA-NP002139 GA
28196369A IN
71004912A IN
and 7 more
Self-reported in NPPES; status is on the state search - Practice location
- 556 Washington Ave Ste 201, North Haven, CT 06473
- Phone
- (203) 779-5799
- Enumerated
- Apr 2, 2014
- Record last updated
- Oct 9, 2025
- Fax
- (203) 599-0260
- Medicaid ID
- 201228430 IN
- Medicare enrollment
- Enrolled (PECOS I20260223001026); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 1,108 in Connecticut → Look up another NPI →
Also registered at 556 Washington Ave Ste 201
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aiza Nimeh, ARNPPsychiatric/Mental Health Nurse Practitioner1952724080
Verify Steven Guichelaar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license 12.013275Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
21 Medicare Part D claims, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Steven Guichelaar among 1,108 psychiatric/mental health nurse practitioner records in Connecticut
Steven Guichelaar, NP is one of 1,108 psychiatric/mental health nurse practitioner records with a practice address in Connecticut. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 31% of them.
- NPI issued2014 · 31% of these records are older, 66% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2014 · median 2020 among the 566 with a school on file
- Record last updated2025 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatric/Mental Health Nurse Practitioner providers in Connecticut
There are 1,108 psychiatric/mental health nurse practitioner records in Connecticut.
All 1,108 in Connecticut → Every provider in North Haven → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Jane Buckley, APRNNorth Haven, CT 064731417913740
- Shelley Halligan, PMHNPNorth Haven, CT 064731871950477
- Aiza Nimeh, ARNPNorth Haven, CT 064731952724080
- John Roy, APRNNorth Haven, CT 064731457583684
- Danil AnisimovOld Saybrook, CT 064751114150984
- Omotayo Awujoola, NURSE PRACTITIONEROld Saybrook, CT 064751194932392
- Catherine Catti, APRNOld Saybrook, CT 064751023410743
- Ewa Conroy, APRNOld Saybrook, CT 064751619937596
Common questions
What is Steven Guichelaar, NP's NPI number?
Steven Guichelaar, NP's National Provider Identifier (NPI) is 1427476811, issued on Apr 2, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Steven Guichelaar, NP located?
The NPPES record lists a practice address at 556 Washington Ave Ste 201, North Haven, CT, 06473. Phone: (203) 779-5799. Providers update this record themselves, so call before visiting.
How can I verify Steven Guichelaar, NP's license?
NPPES lists Connecticut license number 12.013275, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity only.
How much does Steven Guichelaar, NP prescribe under Medicare Part D?
In 2024, Steven Guichelaar, NP had 21 Medicare Part D claims; the average among psychiatric/mental health nurse practitioner prescribers was 906. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. 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.