Quick answers
- Does Louis J. Marino Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Louis J. Marino Jr. accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Louis J. Marino Jr. see?
- In 2024, CMS data shows 21 Original Medicare patients and 311 services for Louis J. Marino Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Louis J. Marino Jr.'s NPI number?
- 1194739607. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Louis J. Marino Jr., data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 21 |
|---|---|
| Services billed to Medicare | 311 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)291 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Depression75%
- Anxiety75%
- Arthritis71%
- Alzheimer's disease or dementia57%
Practice locations
Addresses where Louis J. Marino Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 6501 N Charles StBaltimore, MD 21204 (410) 938‑5000
- 7220 Discovery DrElkridge, MD 21075
Group practices
Medicare enrollment lists Louis J. Marino Jr. as a member of this group (CMS data updated October 2, 2026).
- Sheppard Pratt Physicians PA67 clinicians in the group
Specialties
- Geriatric Psychiatryprimary
- Psychiatryalso
Other geriatric psychiatrists in Maryland
Clinicians with the same Medicare primary specialty in Maryland — not a recommendation.
Other clinicians in Sheppard Pratt Physicians PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York Downstate Medical Center |
| Graduation year | 1991 (35 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194739607 |
| 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
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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