Marilyn Marencik, FNP-C
NPI 1578088712 · Family Nurse Practitioner · Radnor, PA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marilyn Marencik, FNP-C is a Family Nurse Practitioner provider in Radnor, PA (NPI 1578088712).
Provider details
- NPI number
- 1578088712
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- SP017705 (PA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
176 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 84 | $110 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 58 | $146 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 23 | $80 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 11 | $91 |
Typical Medicare-allowed amounts for these services range $80–$146 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 44 | 44 |
| Nirmatrelvir/Ritonavirbrand: Paxlovid | 37 | 37 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 16 | 15 |
| Doxycycline Hyclate | 14 | 14 |
| Montelukast Sodium | 13 | — |
| Prednisone | 13 | 13 |
| Methylprednisolone |
Practice location
Mailing address
Additional practice locations (1)
- 1001 Chesterbrook BlvdBerwyn, PA 19312-3805Phone: (610) 576-7500
Registry dates
- Enumerated
- 2017-08-09
- Last updated
- 2022-07-27
- Certified
- 2022-07-27
Frequently asked questions
- What is Marilyn Marencik's NPI number?
- Marilyn Marencik's National Provider Identifier (NPI) is 1578088712, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marilyn Marencik's specialty?
- Marilyn Marencik is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marilyn Marencik located?
- Marilyn Marencik's practice location on file with NPPES is 250 King of Prussia Rd, Radnor, PA 19087-5235.
- What is Marilyn Marencik's phone number?
- The practice phone number listed in the NPPES registry for Marilyn Marencik is (215) 662-7366.
- Does Marilyn Marencik accept Medicare?
- Marilyn Marencik is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marilyn Marencik's NPI active?
- Yes — Marilyn Marencik's NPI (1578088712) is active in the NPPES registry as of the last update on 2022-07-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.