Catherine Sinkhorn, MD
NPI 1689104218 · Family Medicine Physician · Mishawaka, IN
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Sinkhorn, MD is a Family Medicine Physician provider in Mishawaka, IN (NPI 1689104218).
Provider details
- NPI number
- 1689104218
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 11019217A (IN)
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 tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,090 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 | 395 | $119 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 177 | $9 |
| 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 | 128 | $15 |
| Administration of Influenza Virus VaccineG0008 | 92 | $30 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 80 | $84 |
| Administration of Pneumococcal Vaccine |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 152 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 613 | 167 |
| Levothyroxine Sodium | 565 | 149 |
| Amlodipine Besylate | 497 | 141 |
| Losartan Potassium | 418 | 123 |
| Omeprazole | 401 | 105 |
| Lisinopril | 345 | 94 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 across 1 record (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 (1)
- 707 Cedar StSouth Bend, IN 46617-2054Phone: (547) 335-8700
Registry dates
- Enumerated
- 2017-06-15
- Last updated
- 2020-04-13
- Certified
- 2020-04-13
Frequently asked questions
- What is Catherine Sinkhorn's NPI number?
- Catherine Sinkhorn's National Provider Identifier (NPI) is 1689104218, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Sinkhorn's specialty?
- Catherine Sinkhorn is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Catherine Sinkhorn located?
- Catherine Sinkhorn's practice location on file with NPPES is 611 E Douglas Rd Ste 407, Mishawaka, IN 46545-1468.
- What is Catherine Sinkhorn's phone number?
- The practice phone number listed in the NPPES registry for Catherine Sinkhorn is (574) 335-6500.
- Does Catherine Sinkhorn accept Medicare?
- Catherine Sinkhorn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Sinkhorn's NPI active?
- Yes — Catherine Sinkhorn's NPI (1689104218) is active in the NPPES registry as of the last update on 2020-04-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.