Karen Ringwald, MD
NPI 1922075084 · Rheumatology Physician · Fort Wayne, IN
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Ringwald, MD is a Rheumatology Physician provider in Fort Wayne, IN (NPI 1922075084).
Provider details
- NPI number
- 1922075084
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 01055867A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
12 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,583 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 866 | $118 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 313 | $57 |
| Administration of Chemotherapy Into Vein, Each Additional Hour96415 | 135 | $25 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 101 | $117 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 94 | $13 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 59 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxychloroquine Sulfate | 719 | 167 |
| Prednisone | 678 | 201 |
| Methotrexate Sodiumbrand: Methotrexate | 633 | 162 |
| Leflunomide | 262 | 60 |
| Adalimumabbrand: Humira(cf) Pen | 135 | 14 |
| Methylprednisolone | 119 | 43 |
| Folic Acid | 114 | 30 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$583 across 31 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (11)
- 516 E Maumee StAngola, IN 46703-2017Phone: (260) 436-0800Fax: (260) 483-1911
- 303 S Main StBluffton, IN 46714-2503Phone: (260) 436-0800Fax: (260) 483-1911
- 1100 Mercer AveDecatur, IN 46733-2303Phone: (260) 436-0800Fax: (260) 483-1911
- 7910 W Jefferson Blvd Ste 108Fort Wayne, IN 46804-4159Phone: (260) 436-0800Fax: (260) 483-1911
- 7916 W Jefferson BlvdFort Wayne, IN 46804-4140Phone: (260) 432-2297Fax: (260) 434-6392
- 2514 E Dupont Rd Ste 100Fort Wayne, IN 46825-1619Phone: (260) 484-8830Fax: (260) 483-1911
- 610 N Sawyer RdKendallville, IN 46755-2566Phone: (260) 436-0800Fax: (260) 483-1911
- 2120 N Detroit St Ste 100Lagrange, IN 46761-1147Phone: (260) 436-0800
Registry dates
- Enumerated
- 2006-03-07
- Last updated
- 2026-01-15
- Certified
- 2026-01-15
Frequently asked questions
- What is Karen Ringwald's NPI number?
- Karen Ringwald's National Provider Identifier (NPI) is 1922075084, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Ringwald's specialty?
- Karen Ringwald is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Ringwald located?
- Karen Ringwald's practice location on file with NPPES is 7910 W Jefferson Blvd Ste 217, Fort Wayne, IN 46804-4159.
- What is Karen Ringwald's phone number?
- The practice phone number listed in the NPPES registry for Karen Ringwald is (260) 234-2698.
- Does Karen Ringwald accept Medicare?
- Karen Ringwald is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Ringwald's NPI active?
- Yes — Karen Ringwald's NPI (1922075084) is active in the NPPES registry as of the last update on 2026-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.