Quick answers
- Does Jacob F. Collen accept Medicare assignment?
- Yes. Medicare's clinician data says Jacob F. Collen 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 Jacob F. Collen see?
- In 2024, CMS data shows 225 Original Medicare patients and 329 services for Jacob F. Collen. This counts Original Medicare only and measures volume, not quality.
- What is Jacob F. Collen's NPI number?
- 1528164704. 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 Jacob F. Collen, 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 | 225 |
|---|---|
| Services billed to Medicare | 329 |
| Different services or procedures | 21 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Critical care, first 30-74 minutes (99291)108 services
- Sleep study in sleep lab (6 years or older) (95810)68 services
- Home sleep test (hst) with type iii portable monitor, unattended; minimum of 4 channels: 2 respiratory movement/airflow, 1 ecg/heart rate and 1 oxygen saturation (G0399)47 services
- Sleep study in sleep lab with continuous airway pressure (6 years or older) (95811)21 services
- Critical care, each additional 30 minutes (99292)19 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%
- Arthritis49%
- Diabetes39%
- Depression39%
- Anxiety33%
Hospitals where Jacob F. Collen works
Medicare's Facility Affiliation Data lists Jacob F. Collen at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Frederick Health HospitalFrederick, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210005
- Sibley Memorial HospitalWashington, DC · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 090005
Practice locations
Addresses where Jacob F. Collen is enrolled with Medicare (CMS data updated October 2, 2026).
- 400 W 7th StFrederick, MD 21701
- 490 Cadmus Ln, Suite 102Easton, MD 21601 (410) 822‑1000
- 504 E Ridgeville BlvdMount Airy, MD 21771 (240) 215‑6310
- 5255 Loughboro Rd NWWashington, DC 20016 (202) 537‑4000
- 7211 Bank CtFrederick, MD 21703 (240) 215‑6310
Group practices
Medicare enrollment lists Jacob F. Collen as a member of these groups (CMS data updated October 2, 2026).
- Johns Hopkins Community Physicians, Inc763 clinicians in the group
- University of Maryland Community Medical Group Inc477 clinicians in the group
- Frederick Health Medical Group LLC199 clinicians in the group
Specialties
- Internal Medicineprimary
- Pulmonary Diseasealso
Other internal medicine doctors in Frederick
Clinicians with the same Medicare primary specialty in Frederick, MD — not a recommendation.
Other clinicians in Johns Hopkins Community Physicians, Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Uniformed Services Uhs Fe Hebert School Of Med |
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1528164704 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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