Karen Hennessey, M.D.
NPI 1285783175 · Specialist · Bronx, NY
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Hennessey, M.D. is a Specialist provider in Bronx, NY (NPI 1285783175).
Provider details
- NPI number
- 1285783175
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 195693 (NY)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
12 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) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 12 | $146 |
Typical Medicare-allowed amounts for these services range $146–$146 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 71 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 248 | 43 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 164 | 25 |
| Amlodipine Besylate | 109 | 30 |
| Omeprazole | 96 | 13 |
| Atorvastatin Calcium | 87 | 20 |
| Rosuvastatin Calcium | 86 | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$243 across 6 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
Registry dates
- Enumerated
- 2007-01-09
- Last updated
- 2007-07-08
Frequently asked questions
- What is Karen Hennessey's NPI number?
- Karen Hennessey's National Provider Identifier (NPI) is 1285783175, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Hennessey's specialty?
- Karen Hennessey is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Karen Hennessey located?
- Karen Hennessey's practice location on file with NPPES is 234 E 149th St, Bronx, NY 10451-5504.
- What is Karen Hennessey's phone number?
- The practice phone number listed in the NPPES registry for Karen Hennessey is (718) 579-5865.
- Does Karen Hennessey accept Medicare?
- Karen Hennessey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Hennessey's NPI active?
- Yes — Karen Hennessey's NPI (1285783175) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.