Mary Holwerda
NPI 1114597580 · Professional Counselor · Grand Haven, MI
Enrolled with Medicare as Practitioner - Mental Health Counselor · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Holwerda is a Professional Counselor provider in Grand Haven, MI (NPI 1114597580).
Provider details
- NPI number
- 1114597580
- Entity type
- Individual
- Primary specialty
- Professional CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 6401009154
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
4 yrs in NPPES 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
- 2021-06-29
- Last updated
- 2021-06-29
- Certified
- 2021-06-29
Frequently asked questions
- What is Mary Holwerda's NPI number?
- Mary Holwerda's National Provider Identifier (NPI) is 1114597580, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Holwerda's specialty?
- Mary Holwerda is listed in the NPPES registry with a primary specialty of Professional Counselor (Behavioral Health & Social Service Providers).
- Where is Mary Holwerda located?
- Mary Holwerda's practice location on file with NPPES is 320 Columbus Ave, Grand Haven, MI 49417-1289.
- What is Mary Holwerda's phone number?
- The practice phone number listed in the NPPES registry for Mary Holwerda is (616) 607-4476.
- Does Mary Holwerda accept Medicare?
- Mary Holwerda is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Holwerda's NPI active?
- Yes — Mary Holwerda's NPI (1114597580) is active in the NPPES registry as of the last update on 2021-06-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.