Sonder Psychological Services PLLC
NPI 1871423418 · Counseling Psychologist · Holland, MI
Sonder Psychological Services PLLC is a Counseling Psychologist organization in Holland, MI (NPI 1871423418).
Provider details
- NPI number
- 1871423418
- Entity type
- Organization
- Primary specialty
- Counseling PsychologistBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Mykailah Siggers, Managing Member(616) 256-7792
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2026-05-22
- Last updated
- 2026-05-22
- Certified
- 2026-05-22
Frequently asked questions
- What is Sonder Psychological Services PLLC's NPI number?
- Sonder Psychological Services PLLC's National Provider Identifier (NPI) is 1871423418, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Sonder Psychological Services PLLC?
- Sonder Psychological Services PLLC is classified in the NPPES registry as Counseling Psychologist (Behavioral Health & Social Service Providers).
- Where is Sonder Psychological Services PLLC located?
- Sonder Psychological Services PLLC's practice location on file with NPPES is 265 Kollen Park Dr, Holland, MI 49423-3401.
- What is Sonder Psychological Services PLLC's phone number?
- The practice phone number listed in the NPPES registry for Sonder Psychological Services PLLC is (616) 681-3955.
- Who is the authorized official for Sonder Psychological Services PLLC?
- The authorized official listed on Sonder Psychological Services PLLC's NPPES record is Mykailah Siggers, Managing Member. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Sonder Psychological Services PLLC's NPI active?
- Yes — Sonder Psychological Services PLLC's NPI (1871423418) is active in the NPPES registry as of the last update on 2026-05-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.