Quick answers
- Does Helen A. Mashek accept Medicare assignment?
- Yes. Medicare's clinician data says Helen A. Mashek 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 Helen A. Mashek see?
- In 2024, CMS data shows 1,779 Original Medicare patients and 14,928 services for Helen A. Mashek. This counts Original Medicare only and measures volume, not quality.
- What is Helen A. Mashek's NPI number?
- 1023012515. 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 Helen A. Mashek, 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 | 1,779 |
|---|---|
| Services billed to Medicare | 14,928 |
| Different services or procedures | 66 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Aminolevulinic acid hcl for topical administration, 10% gel, 10 mg (J7345)6,000 services
- Destruction of precancer skin growth, 2-14 growths (17003)3,133 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)1,714 services
- Destruction of precancer skin growth, 1 growth (17000)1,084 services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)664 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 pressure71%
- Arthritis45%
- Diabetes24%
- Anxiety20%
- Ischemic heart disease19%
Practice locations
Addresses where Helen A. Mashek is enrolled with Medicare (CMS data updated October 2, 2026).
- 537 Stanton Christiana Rd, Suite 207Newark, DE 19713
Group practices
Medicare enrollment lists Helen A. Mashek as a member of this group (CMS data updated October 2, 2026).
- Panzer Dermatology Associates24 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in Newark
Clinicians with the same Medicare primary specialty in Newark, DE — not a recommendation.
Other clinicians in Panzer Dermatology Associates
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rutgers New Jersey Medical School |
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023012515 |
| 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