Erin Niehaus, APRN
NPI 1821742610 · Family Nurse Practitioner · Spearfish, SD
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erin Niehaus, APRN is a Family Nurse Practitioner provider in Spearfish, SD (NPI 1821742610).
Provider details
- NPI number
- 1821742610
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN
- Sex
- Female
- Sole proprietor
- No
- License
- CP002299 (SD)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
4 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
196 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 60 | $53 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 37 | $75 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 29 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 29 | $106 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 25 | $78 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 29 | 28 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 25 | 25 |
| Cephalexin | 17 | 17 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 17 | 17 |
| Doxycycline Hyclate | 15 | 14 |
| Doxycycline Monohydrate | 13 | 13 |
| Azithromycin | 12 | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-02-09
- Last updated
- 2022-02-09
- Certified
- 2022-01-26
Frequently asked questions
- What is Erin Niehaus's NPI number?
- Erin Niehaus's National Provider Identifier (NPI) is 1821742610, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erin Niehaus's specialty?
- Erin Niehaus is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Erin Niehaus located?
- Erin Niehaus's practice location on file with NPPES is 1420 N 10th St, Spearfish, SD 57783-1532.
- What is Erin Niehaus's phone number?
- The practice phone number listed in the NPPES registry for Erin Niehaus is (605) 717-8595.
- Does Erin Niehaus accept Medicare?
- Erin Niehaus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erin Niehaus's NPI active?
- Yes — Erin Niehaus's NPI (1821742610) is active in the NPPES registry as of the last update on 2022-02-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.