Quick answers
- Does Karen A. Ganz accept Medicare assignment?
- Yes. Medicare's clinician data says Karen A. Ganz 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 Karen A. Ganz see?
- In 2024, CMS data shows 407 Original Medicare patients and 1,141 services for Karen A. Ganz. This counts Original Medicare only and measures volume, not quality.
- What is Karen A. Ganz's NPI number?
- 1851464093. 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 Karen A. Ganz, 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 | 407 |
|---|---|
| Services billed to Medicare | 1,141 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)431 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)353 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)234 services
- Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and (G0180)39 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 pressure68%
- High cholesterol64%
- Arthritis46%
- Osteoporosis26%
- Anxiety23%
- Chronic kidney disease18%
Hospitals where Karen A. Ganz works
Medicare's Facility Affiliation Data lists Karen A. Ganz 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.
- Anna Jaques HospitalNewburyport, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220029
- Beth Israel Deaconess Medical CenterBoston, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220086
- Lahey Hospital & Medical Center, BurlingtonBurlington, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220171
- Northeast Hospital CorporationBeverly, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220033
- Winchester HospitalWinchester, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220105
Practice locations
Addresses where Karen A. Ganz is enrolled with Medicare (CMS data updated October 2, 2026).
- 41 Mall RdBurlington, MA 01805 (781) 744‑8085
Group practices
Medicare enrollment lists Karen A. Ganz as a member of this group (CMS data updated October 2, 2026).
- Lahey Clinic Inc1,381 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Burlington
Clinicians with the same Medicare primary specialty in Burlington, MA — not a recommendation.
Other clinicians in Lahey Clinic Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tufts University School Of Medicine |
| Graduation year | 2003 (23 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1851464093 |
| 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