Quick answers
- Which hospitals does Daniel C. Brennan work at?
- Medicare's official clinician data lists Daniel C. Brennan at 4 hospitals: Barnes Jewish Hospital, Luminis Health Anne Arundel Medical Center, Inc, The Johns Hopkins Hospital and WellSpan York Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Daniel C. Brennan see patients?
- Medicare's clinician data lists 4 practice locations, including Baltimore, MD. Call before your visit to confirm the address.
- What is Daniel C. Brennan's specialty?
- Medicare lists Nephrology as the primary specialty, and also Internal Medicine.
- Does Daniel C. Brennan accept Medicare assignment?
- Medicare's clinician data says Daniel C. Brennan may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Daniel C. Brennan?
- (443) 444-4714, as listed in official Medicare / NPI Registry data.
- What is Daniel C. Brennan's NPI number?
- 1023036597. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Daniel C. Brennan works
Medicare's Facility Affiliation Data lists Daniel C. Brennan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Barnes Jewish HospitalSaint Louis, MO · Acute Care Hospital · CCN 260032
- Luminis Health Anne Arundel Medical Center, IncAnnapolis, MD · Acute Care Hospital · CCN 210023
- The Johns Hopkins HospitalBaltimore, MD · Acute Care Hospital · CCN 210009
- WellSpan York HospitalYork, PA · Acute Care Hospital · CCN 390046
Practice locations
Addresses where Daniel C. Brennan is enrolled with Medicare (CMS data updated 2026-10-02).
- 5601 Lloch Raven BlvdBaltimore, MD 21239 (443) 444‑4714
- 600 N Wolf StBaltimore, MD 21287
- 600 N Wolfe St, Blalock 266Baltimore, MD 21287 (410) 502‑4340
- 601 N Caroline StBaltimore, MD 21287
Group practices
Medicare enrollment lists Daniel C. Brennan as a member of this group (CMS data updated 2026-10-02).
- Johns Hopkins University2,909 clinicians in the group
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in Baltimore
Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Iowa, Rj & L Carver College Of Medicine |
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1023036597 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians