Mariellen Antman, APN-CNP
NPI 1235271941 · Adult Health Nurse Practitioner · Lake Forest, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mariellen Antman, APN-CNP is a Adult Health Nurse Practitioner provider in Lake Forest, IL (NPI 1235271941).
Provider details
- NPI number
- 1235271941
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APN-CNP
- Sex
- Female
- Sole proprietor
- No
- License
- 041202000 (IL)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
443 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 352 | $162 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 72 | $13 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 19 | $115 |
Typical Medicare-allowed amounts for these services range $13–$162 (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 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 224 | 93 |
| Atorvastatin Calcium | 155 | 62 |
| Amlodipine Besylate | 124 | 51 |
| Apixabanbrand: Eliquis | 119 | 36 |
| Torsemide | 84 | 40 |
| Metoprolol Tartrate | 83 | 35 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$248 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-12
- Last updated
- 2016-10-13
Frequently asked questions
- What is Mariellen Antman's NPI number?
- Mariellen Antman's National Provider Identifier (NPI) is 1235271941, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mariellen Antman's specialty?
- Mariellen Antman is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mariellen Antman located?
- Mariellen Antman's practice location on file with NPPES is 800 N Westmoreland Rd, Lake Forest, IL 60045-1673.
- What is Mariellen Antman's phone number?
- The practice phone number listed in the NPPES registry for Mariellen Antman is (847) 735-8550.
- Does Mariellen Antman accept Medicare?
- Mariellen Antman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mariellen Antman's NPI active?
- Yes — Mariellen Antman's NPI (1235271941) is active in the NPPES registry as of the last update on 2016-10-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.