Quick answers
- Does Martha Karetny accept Medicare assignment?
- Yes. Medicare's clinician data says Martha Karetny 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 Martha Karetny see?
- In 2024, CMS data shows 56 Original Medicare patients and 766 services for Martha Karetny. This counts Original Medicare only and measures volume, not quality.
- What is Martha Karetny's NPI number?
- 1306806419. 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 Martha Karetny, 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 | 56 |
|---|---|
| Services billed to Medicare | 766 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 80 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)284 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)135 services
- Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes (99348)82 services
- Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes (99349)46 services
- Insertion of needle into vein for collection of blood sample (36415)44 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%
- Arthritis68%
- Ischemic heart disease68%
- Diabetes66%
- Depression46%
Practice locations
Addresses where Martha Karetny is enrolled with Medicare (CMS data updated October 2, 2026).
- 726 Ave ZBrooklyn, NY 11223
- 726 Ave Z, Fl 2Brooklyn, NY 11223 (718) 872‑7373
Group practices
Medicare enrollment lists Martha Karetny as a member of this group (CMS data updated October 2, 2026).
- Hope and Health Medical Care PC2 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Brooklyn
Clinicians with the same Medicare primary specialty in Brooklyn, NY — not a recommendation.
Other clinicians in Hope and Health Medical Care PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1985 (41 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) | 1306806419 |
| 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