Ryan Marendiuk, DNP
NPI 1093965816 · Psychiatric/Mental Health Nurse Practitioner · Fond Du Lac, WI
Ryan Marendiuk, DNP is a Psychiatric/Mental Health Nurse Practitioner provider in Fond Du Lac, WI (NPI 1093965816).
Provider details
- NPI number
- 1093965816
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- DNP
- Sex
- Male
- Sole proprietor
- No
- License
- 48298 (HI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service 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
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
4 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxyzine Pamoate | 29 | 19 |
| Olanzapine | 23 | — |
| Clonidine Hcl | 22 | 16 |
| Haloperidol | 13 | — |
| Risperidone | 12 | — |
| Sertraline Hcl | 12 | — |
| Aripiprazole | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (3)
- 3726 E Mullan AvePost Falls, ID 83854-9852Phone: (208) 777-2489
- 845 Parkside StRipon, WI 54971-8505Phone: (920) 926-4200Fax: (920) 926-8933
- 620 W Brown StWaupun, WI 53963-1702Phone: (920) 324-7600Fax: (920) 324-8459
Registry dates
- Enumerated
- 2008-09-29
- Last updated
- 2023-05-22
- Certified
- 2023-05-11
Frequently asked questions
- What is Ryan Marendiuk's NPI number?
- Ryan Marendiuk's National Provider Identifier (NPI) is 1093965816, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan Marendiuk's specialty?
- Ryan Marendiuk is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Ryan Marendiuk located?
- Ryan Marendiuk's practice location on file with NPPES is 430 E Division St, Fond Du Lac, WI 54935-4560.
- What is Ryan Marendiuk's phone number?
- The practice phone number listed in the NPPES registry for Ryan Marendiuk is (920) 926-4200.
- Is Ryan Marendiuk's NPI active?
- Yes — Ryan Marendiuk's NPI (1093965816) is active in the NPPES registry as of the last update on 2023-05-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.