Steven Guichelaar, NP
NPI 1427476811 · Psychiatric/Mental Health Nurse Practitioner · North Haven, CT
Enrolled with Medicare as Practitioner - Addiction Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Steven Guichelaar, NP is a Psychiatric/Mental Health Nurse Practitioner provider in North Haven, CT (NPI 1427476811).
Provider details
- NPI number
- 1427476811
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Male
- Sole proprietor
- No
- License
- 71004912A (IN)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
11 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (10)
- 1625 S Congress Ave Ste 406Delray Beach, FL 33445-6304Phone: (561) 418-3262
- 1775 the Exchange Se Ste 610Atlanta, GA 30339-2051Phone: (770) 526-0535
- 6505 E 82nd StIndianapolis, IN 46250-5538Phone: (317) 779-0310
- 7400 New La Grange Rd Ste 250Louisville, KY 40222-8801Phone: (502) 907-2290
- 9 Pond Ln Ste 105Concord, MA 01742-2842Phone: (617) 430-4949
- 500 Southborough Dr Ste 205South Portland, ME 04106-6959Phone: (207) 813-4167
- 15 Constitution Dr Ste 2nBedford, NH 03110-6002Phone: (603) 769-8462
- 6161 Oak Tree BlvdIndependence, OH 44131-2516Phone: (216) 200-4415
- 1041 Ten Rod Rd Unit 8North Kingstown, RI 02852-4125Phone: (401) 232-4166
Registry dates
- Enumerated
- 2014-04-02
- Last updated
- 2025-10-09
- Certified
- 2025-10-09
Frequently asked questions
- What is Steven Guichelaar's NPI number?
- Steven Guichelaar's National Provider Identifier (NPI) is 1427476811, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steven Guichelaar's specialty?
- Steven Guichelaar is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Steven Guichelaar located?
- Steven Guichelaar's practice location on file with NPPES is 556 Washington Ave Ste 201, North Haven, CT 06473-1149.
- What is Steven Guichelaar's phone number?
- The practice phone number listed in the NPPES registry for Steven Guichelaar is (203) 779-5799.
- Does Steven Guichelaar accept Medicare?
- Steven Guichelaar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Steven Guichelaar's NPI active?
- Yes — Steven Guichelaar's NPI (1427476811) is active in the NPPES registry as of the last update on 2025-10-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.