Stephen Riggs, M.D.
NPI 1871520080 · Internal Medicine Physician · Waterloo, IA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Riggs, M.D. is a Internal Medicine Physician provider in Waterloo, IA (NPI 1871520080).
Provider details
- NPI number
- 1871520080
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 28568 (IA)
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
20 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
1,015 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 | 414 | $89 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 129 | $120 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 118 | $61 |
| Anticoagulant Management of Patient Taking Warfarin93793 | 78 | $11 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 66 | $7 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 111 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 323 | 88 |
| Atorvastatin Calcium | 258 | 71 |
| Omeprazole | 182 | 44 |
| Lisinopril | 178 | 50 |
| Amlodipine Besylate | 157 | 45 |
| Metformin Hcl | 128 | 43 |
| Semaglutide |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-26
- Last updated
- 2007-07-16
Frequently asked questions
- What is Stephen Riggs's NPI number?
- Stephen Riggs's National Provider Identifier (NPI) is 1871520080, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Riggs's specialty?
- Stephen Riggs is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Riggs located?
- Stephen Riggs's practice location on file with NPPES is 236 National Dr, Waterloo, IA 50701-4263.
- What is Stephen Riggs's phone number?
- The practice phone number listed in the NPPES registry for Stephen Riggs is (319) 272-0000.
- Does Stephen Riggs accept Medicare?
- Stephen Riggs is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Riggs's NPI active?
- Yes — Stephen Riggs's NPI (1871520080) is active in the NPPES registry as of the last update on 2007-07-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.