Erin Terpstra, MD, PHD
NPI 1366005662 · Internal Medicine Physician · Sioux Falls, SD
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erin Terpstra, MD, PHD is a Internal Medicine Physician provider in Sioux Falls, SD (NPI 1366005662).
Provider details
- NPI number
- 1366005662
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
939 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 422 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 359 | $91 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 75 | $62 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 45 | $135 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 23 | $126 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 93 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 234 | 80 |
| Levothyroxine Sodium | 228 | 60 |
| Omeprazole | 161 | 56 |
| Rosuvastatin Calcium | 159 | 51 |
| Losartan Potassium | 135 | 46 |
| Lisinopril | 126 | 35 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-04-22
- Last updated
- 2022-12-20
- Certified
- 2022-12-20
Frequently asked questions
- What is Erin Terpstra's NPI number?
- Erin Terpstra's National Provider Identifier (NPI) is 1366005662, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erin Terpstra's specialty?
- Erin Terpstra is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Erin Terpstra located?
- Erin Terpstra's practice location on file with NPPES is 1321 W 22nd St, Sioux Falls, SD 57105-1502.
- What is Erin Terpstra's phone number?
- The practice phone number listed in the NPPES registry for Erin Terpstra is (605) 404-4000.
- Does Erin Terpstra accept Medicare?
- Erin Terpstra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erin Terpstra's NPI active?
- Yes — Erin Terpstra's NPI (1366005662) is active in the NPPES registry as of the last update on 2022-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.