Quick answers
- Does Geoffrey V. Martin accept Medicare assignment?
- Yes. Medicare's clinician data says Geoffrey V. Martin 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 Geoffrey V. Martin see?
- In 2024, CMS data shows 313 Original Medicare patients and 12,080 services for Geoffrey V. Martin. This counts Original Medicare only and measures volume, not quality.
- What is Geoffrey V. Martin's NPI number?
- 1245675800. 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 Geoffrey V. Martin, 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 | 313 |
|---|---|
| Services billed to Medicare | 12,080 |
| Different services or procedures | 39 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session (G6015)2,644 services
- Ct guidance for insertion of radiation therapy fields (77014)2,521 services
- Calculation of radiation therapy dose (77300)1,007 services
- Continuing radiation therapy consultation per week (77336)482 services
- Radiation treatment management, 5 treatment sessions (77427)482 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%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
- Diabetes34%
- Arthritis30%
- Ischemic heart disease28%
Hospitals where Geoffrey V. Martin works
Medicare's Facility Affiliation Data lists Geoffrey V. Martin 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.
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140242
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140116
Practice locations
Addresses where Geoffrey V. Martin is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 12435 Park Potomac Ave, Suite 400Potomac, MD 20854 (443) 738‑2872
- 1838 Greene Tree Rd, Suite 460Baltimore, MD 21208 (410) 581‑8140
- 2800 Quarry Lake Dr, Suite 180Baltimore, MD 21209 (443) 738‑9393
- 4309 W Medical Ctr Dr, Suite A200McHenry, IL 60050 (815) 759‑8070
- 515 Valley View Dr, Suite 201Moline, IL 61265 (312) 695‑0870
Group practices
Medicare enrollment lists Geoffrey V. Martin as a member of these groups (CMS data updated October 2, 2026).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
- Chesapeake Urology Associates LLC177 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Maryland
Clinicians with the same Medicare primary specialty in Maryland — not a recommendation.
Other clinicians in Northwestern Medical Faculty Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2013 (13 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) | 1245675800 |
| 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