Ryan Siewert, MD
NPI 1528355500 · Family Medicine Physician · Williston, ND
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan Siewert, MD is a Family Medicine Physician provider in Williston, ND (NPI 1528355500).
Provider details
- NPI number
- 1528355500
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- RL11922 (ND)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,748 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 515 | $123 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 279 | $103 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 156 | $88 |
| Screening Mammography77067 | 149 | $90 |
| Screening 3d Breast Mammography77063 | 143 | $24 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 165 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 511 | 116 |
| Atorvastatin Calcium | 508 | 143 |
| Lisinopril | 357 | 81 |
| Amlodipine Besylate | 351 | 81 |
| Losartan Potassium | 321 | 84 |
| Furosemide | 309 | 69 |
| Omeprazole | 290 |
Practice location
Mailing address
Additional practice locations (1)
- 2305 37th Ave SwMinot, ND 58701-7669Phone: (701) 418-8000
Registry dates
- Enumerated
- 2011-06-29
- Last updated
- 2025-09-24
- Certified
- 2025-09-24
Frequently asked questions
- What is Ryan Siewert's NPI number?
- Ryan Siewert's National Provider Identifier (NPI) is 1528355500, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan Siewert's specialty?
- Ryan Siewert is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ryan Siewert located?
- Ryan Siewert's practice location on file with NPPES is 1321 W Dakota Pkwy, Williston, ND 58801-3807.
- What is Ryan Siewert's phone number?
- The practice phone number listed in the NPPES registry for Ryan Siewert is (701) 572-7711.
- Does Ryan Siewert accept Medicare?
- Ryan Siewert is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan Siewert's NPI active?
- Yes — Ryan Siewert's NPI (1528355500) is active in the NPPES registry as of the last update on 2025-09-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.