Quick answers
- Does Dirk F. Hartog accept Medicare assignment?
- Medicare's clinician data says Dirk F. Hartog may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Dirk F. Hartog see?
- In 2024, CMS data shows 27 Original Medicare patients and 1,803 services for Dirk F. Hartog. This counts Original Medicare only and measures volume, not quality.
- What is Dirk F. Hartog's NPI number?
- 1255567590. 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 Dirk F. Hartog, 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 | 27 |
|---|---|
| Services billed to Medicare | 1,803 |
| Different services or procedures | 6 |
| Participating Medicare provider | No |
| Average age of these patients | 77 |
Most frequent services
- Therapy procedure to re-educate brain-to-nerve-to-muscle function, each 15 minutes (97112)741 services
- Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes (97110)564 services
- Therapy procedure using manual technique, each 15 minutes (97140)406 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).
- Arthritis70%
- High blood pressure67%
- High cholesterol67%
- Osteoporosis41%
Practice locations
Addresses where Dirk F. Hartog is enrolled with Medicare (CMS data updated October 2, 2026).
- 53 Columbus Ave, Suite 4New York, NY 10023 (212) 541‑8450
Group practices
Medicare enrollment lists Dirk F. Hartog as a member of this group (CMS data updated October 2, 2026).
- Marika Molnar Physical Therapist PC9 clinicians in the group
Specialties
Find other clinicians: Physical Therapist in Private Practice, New York →
Other physical therapists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Other clinicians in Marika Molnar Physical Therapist PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2008 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1255567590 |
| 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