Mary Holwerda
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2021
- Practice address
- 320 Columbus Ave, Grand Haven, MI 49417
- Practice phone
- Call (616) 607-4476
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Start and Associates Psychological Support
Grand Haven, Michigan
Find Mary Holwerda's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Mary Holwerda is a professional counselor in Grand Haven, Michigan
Mary Holwerda practices at Start and Associates Psychological Support in Grand Haven, Michigan.
Mary Holwerda's NPI, 1114597580, was assigned on June 29, 2021.
- NPI
- 1114597580NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5991148231
- NPI enumeration date
- June 29, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (616) 607-4476
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Mary Holwerda practices at Start and Associates Psychological Support in Grand Haven, Michigan
Mary Holwerda's primary practice is Start and Associates Psychological Support, at 320 Columbus Ave, Grand Haven, MI 49417 in Ottawa County. The practice phone is (616) 607-4476.
- Start and Associates Psychological Support320 Columbus Ave, Grand Haven, MI 49417 · Ottawa CountyPhone(616) 607-4476
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Mary Holwerda is affiliated with 2 sites of care and 1 medical group
Mary Holwerda's primary practice is Start and Associates Psychological Support in Grand Haven, Michigan. The medical group on file is Start and Associates Psychological Support. Dmand AI also links Mary Holwerda to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Mary Holwerda's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mary Holwerda practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Start and Associates Psychological Support | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Mary Holwerda is one of 1,984 professional counselors in Michigan
Professional is Mary Holwerda's primary specialty in the NPI Registry, under taxonomy code 101YP2500X.
Specialties and state licenses
- Professional counselorPrimary
Professional counselors near Mary Holwerda
Counts of professional counselors with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Mary Holwerda's patients have a median age of 39
Across all payers, Dmand AI patient panel data puts Mary Holwerda's median patient age at 39, with 63% women.
Mary Holwerda's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 39
Patient panel by sex, all payers
- Women63%
- Men37%
Source: Dmand AI Patient Panel Data
How Mary Holwerda takes part in Medicare
Mary Holwerda accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for Mary Holwerda's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Mary Holwerda
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mary Holwerda's NPI number?
Mary Holwerda's NPI number is 1114597580. It was assigned on June 29, 2021, and it is active in the NPI Registry.
What does Mary Holwerda specialize in?
Mary Holwerda is a professional counselor in Grand Haven, Michigan. The primary specialty in the NPI Registry is Professional Counselor (taxonomy code 101YP2500X).
Where does Mary Holwerda practice?
Mary Holwerda practices at 320 Columbus Ave, Grand Haven, MI 49417. Mary Holwerda's primary practice is Start and Associates Psychological Support in Grand Haven, Michigan. Dmand AI also links Mary Holwerda to 1 group practice or clinic.
What is Mary Holwerda's office phone number?
The practice phone on file for Mary Holwerda is (616) 607-4476.
What medical group is Mary Holwerda part of?
Mary Holwerda is linked to Start and Associates Psychological Support.
Does Mary Holwerda accept Medicare?
Yes. CMS lists Mary Holwerda as accepting Medicare assignment.
How long has Mary Holwerda been practicing?
Mary Holwerda graduated from medical school in 2003, 23 years ago.
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