Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Steven Guichelaar, NP

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1427476811

Steven Guichelaar, NP is a Nurse Practitioner in North Haven, Connecticut. Qualified in 2014, 12 years ago. Works from 11 locations. Licensed in Connecticut, Florida, Georgia and Indiana and 7 more.

Years since qualifying
12
Licensed in
CT, FL, GA, IN, KY, MA
In the registry since
2014
Specialties on file
12
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

See every abbreviation used in this directory →

Practice location Address checks out

556 Washington Ave Ste 201
North Haven, CT 06473-1149
Phone: (203) 779-5799
Fax: (203) 599-0260
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (10)

  • 1625 S Congress Ave Ste 406, Delray Beach, FL 33445-6304 — (561) 418-3262
  • 1775 The Exchange Se Ste 610, Atlanta, GA 30339-2051 — (770) 526-0535
  • 6505 E 82nd St, Indianapolis, IN 46250-5538 — (317) 779-0310
  • 7400 New La Grange Rd Ste 250, Louisville, KY 40222-8801 — (502) 907-2290
  • 9 Pond Ln Ste 105, Concord, MA 01742-2842 — (617) 430-4949
  • 500 Southborough Dr Ste 205, South Portland, ME 04106-6959 — (207) 813-4167
  • 15 Constitution Dr Ste 2n, Bedford, NH 03110-6002 — (603) 769-8462
  • 6161 Oak Tree Blvd, Independence, OH 44131-2516 — (216) 200-4415
  • 1041 Ten Rod Rd Unit 8, North Kingstown, RI 02852-4125 — (401) 232-4166
  • 4405 Cox Rd Ste 150, Glen Allen, VA 23060-6764 — (804) 208-0475

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence 12.013275 (CT)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence 71004912A (IN)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence GAA-NP002139 (GA)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence 0024189657 (VA)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence 4017019 (KY)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence RN10004996 (MA)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence CNP241373 (ME)
Registered Nurse Taxonomy 163W00000X · Licence 28196369A (IN)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence 093521-23 (NH)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence APRN.CNP.0035978 (OH)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence APRN11032714 (FL)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence APRN04079 (RI)

Record details

NPI number1427476811
Entity typeIndividual (Type 1)
GenderMale
Credentials NP
Sole proprietorNo
NPI enumeratedApril 2, 2014
Last updated in NPPESOctober 9, 2025
Certification dateOctober 9, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Accepts Medicare assignment Not indicated
Practice locations4 on file with Medicare

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