Karen Deffenbacher, M.D., PH.D.
NPI 1154702421 · Interventional Cardiology Physician · Harvey, IL
Enrolled with Medicare as Practitioner - Interventional Cardiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Deffenbacher, M.D., PH.D. is a Interventional Cardiology Physician provider in Harvey, IL (NPI 1154702421).
Provider details
- NPI number
- 1154702421
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 264258 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
755 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 233 | $120 |
| Use of a Drug to Induce Depression of Consciousness By Physician Performing a Procedure (5 Years Or Older), Initial 15 Minutes99152 | 89 | $11 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 85 | $169 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 61 | $131 |
| Insertion of Tube in Left Lower Heart Chamber and Coronary Artery for Diagnosis With Review By Radiologist93458 | 46 | $217 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 147 | 50 |
| Metoprolol Succinate | 87 | 31 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 82 | 25 |
| Losartan Potassium | 53 | 25 |
| Lisinopril | 50 | 18 |
| Metoprolol Tartrate | 43 | 21 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14,895 across 56 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 (2)
- 676 N Saint Clair St Ste 600Chicago, IL 60611Phone: (312) 695-0070
- 75 Francis StBoston, MA 02115-6110Phone: (617) 732-5500
Registry dates
- Enumerated
- 2015-06-12
- Last updated
- 2024-12-17
- Certified
- 2024-12-17
Frequently asked questions
- What is Karen Deffenbacher's NPI number?
- Karen Deffenbacher's National Provider Identifier (NPI) is 1154702421, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Deffenbacher's specialty?
- Karen Deffenbacher is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Deffenbacher located?
- Karen Deffenbacher's practice location on file with NPPES is 71 W 156th St Ste 305, Harvey, IL 60426-4264.
- What is Karen Deffenbacher's phone number?
- The practice phone number listed in the NPPES registry for Karen Deffenbacher is (708) 331-2200.
- Does Karen Deffenbacher accept Medicare?
- Karen Deffenbacher is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Deffenbacher's NPI active?
- Yes — Karen Deffenbacher's NPI (1154702421) is active in the NPPES registry as of the last update on 2024-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.