Quick answers
- Does Jeremy J. Janssen accept Medicare assignment?
- Yes. Medicare's clinician data says Jeremy J. Janssen 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 Jeremy J. Janssen see?
- In 2024, CMS data shows 314 Original Medicare patients and 1,690 services for Jeremy J. Janssen. This counts Original Medicare only and measures volume, not quality.
- What is Jeremy J. Janssen's NPI number?
- 1255414371. 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 Jeremy J. Janssen, 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 | 314 |
|---|---|
| Services billed to Medicare | 1,690 |
| Different services or procedures | 44 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)665 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)233 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)134 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)107 services
- Administration of vaccine (90471)82 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 cholesterol75%
- High blood pressure68%
- Arthritis32%
- Ischemic heart disease32%
- Diabetes24%
- Anxiety18%
Practice locations
Addresses where Jeremy J. Janssen is enrolled with Medicare (CMS data updated October 2, 2026).
- 7 Granite Pl, Suite 14Gaithersburg, MD 20878 (240) 631‑1170
Specialties
- Family Practiceprimary
Other family doctors in Gaithersburg
Clinicians with the same Medicare primary specialty in Gaithersburg, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Howard University College Of Medicine |
| Graduation year | 1998 (28 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1255414371 |
| 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