Quick answers
- Does Tatiana Maskileyson accept Medicare assignment?
- Yes. Medicare's clinician data says Tatiana Maskileyson 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 Tatiana Maskileyson see?
- In 2024, CMS data shows 97 Original Medicare patients and 198 services for Tatiana Maskileyson. This counts Original Medicare only and measures volume, not quality.
- What is Tatiana Maskileyson's NPI number?
- 1386251643. 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 Tatiana Maskileyson, 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 | 97 |
|---|---|
| Services billed to Medicare | 198 |
| Different services or procedures | 24 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)22 services
- Administration of influenza virus vaccine (G0008)21 services
- Admn sarscov2 vacc 1 dose (90480)20 services
- Sarscov2 vac 50 mcg/0.5ml im (91322)19 services
- Influenza vaccine split virus, preservative free (90662)18 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 cholesterol75%
- High blood pressure65%
- Arthritis42%
- Anxiety23%
- Ischemic heart disease22%
- Diabetes18%
Practice locations
Addresses where Tatiana Maskileyson is enrolled with Medicare (CMS data updated October 2, 2026).
- 111 W 24th St, Suite 300New York, NY 10011 (610) 510‑4881
- 150 S Warner Rd, Suite 130King Of Prussia, PA 19406 (610) 510‑4881
- 2109 Red Lion RdPhiladelphia, PA 19115 (718) 298‑4375
- 400 W Lancaster Ave, Suite 300Devon, PA 19333 (610) 999‑6414
Group practices
Medicare enrollment lists Tatiana Maskileyson as a member of these groups (CMS data updated October 2, 2026).
- Supportive Care of Pennsylvania LLC92 clinicians in the group
- 2 Crows LLC11 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Other clinicians in Supportive Care of Pennsylvania LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1386251643 |
| 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