Joseph Hennessy, M.D.
NPI 1265407209 · Internal Medicine Physician · Chicago, IL
Joseph Hennessy, M.D. is a Internal Medicine Physician provider in Chicago, IL (NPI 1265407209).
Provider details
- NPI number
- 1265407209
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036082176 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 59 | 18 |
| Amlodipine Besylate | 51 | 14 |
| Atorvastatin Calcium | 47 | 13 |
| Pantoprazole Sodium | 45 | 14 |
| Metoprolol Succinate | 44 | — |
| Levothyroxine Sodium | 31 | — |
| Metformin Hcl |
Practice location
Mailing address
Additional practice locations (1)
- 676 N Michigan AveSuite 3120Chicago, IL 60611-2883Phone: (312) 780-2301Fax: (312) 780-2304
Registry dates
- Enumerated
- 2006-02-22
- Last updated
- 2026-03-05
- Certified
- 2026-03-05
Frequently asked questions
- What is Joseph Hennessy's NPI number?
- Joseph Hennessy's National Provider Identifier (NPI) is 1265407209, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Hennessy's specialty?
- Joseph Hennessy is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Hennessy located?
- Joseph Hennessy's practice location on file with NPPES is 1520 W Harrison St, Chicago, IL 60607-3106.
- What is Joseph Hennessy's phone number?
- The practice phone number listed in the NPPES registry for Joseph Hennessy is (312) 942-3192.
- Is Joseph Hennessy's NPI active?
- Yes — Joseph Hennessy's NPI (1265407209) is active in the NPPES registry as of the last update on 2026-03-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.