Dirk Nuenninghoff, MD
NPI 1538109053 · Rheumatology Physician · Portage, WI
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dirk Nuenninghoff, MD is a Rheumatology Physician provider in Portage, WI (NPI 1538109053).
Provider details
- NPI number
- 1538109053
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 45438-020 (WI)
Specialties & taxonomies
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
681 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 179 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 162 | $120 |
| 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 | 155 | $15 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 71 | $8 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test85027 | 69 | $6 |
| Manual Urinalysis Test With Examination Using Microscope, Automated |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 142 | 41 |
| Hydroxychloroquine Sulfate | 129 | 42 |
| Prednisone | 105 | 36 |
| Methotrexate Sodium/Pfbrand: Methotrexate Sodium | 53 | 12 |
| Sulfasalazine | 51 | 13 |
| Leflunomide | 50 | 16 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen |
Practice location
Mailing address
Additional practice locations (1)
- 1821 S Stoughton RdMadison, WI 53716-2257Phone: (608) 260-6000Fax: (608) 260-6855
Registry dates
- Enumerated
- 2006-06-07
- Last updated
- 2025-08-04
- Certified
- 2025-07-28
Frequently asked questions
- What is Dirk Nuenninghoff's NPI number?
- Dirk Nuenninghoff's National Provider Identifier (NPI) is 1538109053, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dirk Nuenninghoff's specialty?
- Dirk Nuenninghoff is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Dirk Nuenninghoff located?
- Dirk Nuenninghoff's practice location on file with NPPES is 2977 County Hwy Cx, Portage, WI 53901.
- What is Dirk Nuenninghoff's phone number?
- The practice phone number listed in the NPPES registry for Dirk Nuenninghoff is (608) 745-3399.
- Does Dirk Nuenninghoff accept Medicare?
- Dirk Nuenninghoff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dirk Nuenninghoff's NPI active?
- Yes — Dirk Nuenninghoff's NPI (1538109053) is active in the NPPES registry as of the last update on 2025-08-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.