Mary Ann Hollenback, APN
NPI 1841339405 · Family Nurse Practitioner · Aurora, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Ann Hollenback, APN is a Family Nurse Practitioner provider in Aurora, IL (NPI 1841339405).
Provider details
- NPI number
- 1841339405
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APN
- Sex
- Female
- Sole proprietor
- No
- License
- 277-000554 (IL)
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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
499 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 | 316 | $111 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 86 | $79 |
| Administration of Influenza Virus VaccineG0008 | 30 | $29 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 21 | $113 |
| Assessment of Emotional Or Behavioral Problems96127 | 19 | $5 |
| Automated Urinalysis Test81003 | 14 | $2 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 55 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 172 | 77 |
| Amlodipine Besylate | 79 | 46 |
| Gabapentin | 66 | 30 |
| Metformin Hcl | 61 | 30 |
| Losartan Potassium | 61 | 31 |
| Metoprolol Succinate | 60 | 32 |
| Sertraline Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-06
- Last updated
- 2024-02-28
- Certified
- 2024-02-28
Frequently asked questions
- What is Mary Ann Hollenback's NPI number?
- Mary Ann Hollenback's National Provider Identifier (NPI) is 1841339405, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Ann Hollenback's specialty?
- Mary Ann Hollenback is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Ann Hollenback located?
- Mary Ann Hollenback's practice location on file with NPPES is 2020 Ogden Ave Ste 400, Aurora, IL 60504-5898.
- What is Mary Ann Hollenback's phone number?
- The practice phone number listed in the NPPES registry for Mary Ann Hollenback is (630) 692-5563.
- Does Mary Ann Hollenback accept Medicare?
- Mary Ann Hollenback is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Ann Hollenback's NPI active?
- Yes — Mary Ann Hollenback's NPI (1841339405) is active in the NPPES registry as of the last update on 2024-02-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.