Mary Johansen, APRN, CNP
NPI 1689208928 · Nurse Practitioner · Mchenry, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Johansen, APRN, CNP is a Nurse Practitioner provider in Mchenry, IL (NPI 1689208928).
Provider details
- NPI number
- 1689208928
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN, CNP
- Sex
- Female
- Sole proprietor
- Yes
- License
- 209020914 (IL)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
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
6 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
77 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 47 | $102 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 18 | $98 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 12 | $149 |
Typical Medicare-allowed amounts for these services range $98–$149 (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 |
|---|---|---|
| Pantoprazole Sodium | 36 | 30 |
| Amlodipine Besylate | 23 | 13 |
| Metoprolol Succinate | 19 | 13 |
| Prednisone | 18 | 18 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 14 | 14 |
| Furosemide | 13 | 11 |
| Cefadroxil |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-02-25
- Last updated
- 2026-02-17
- Certified
- 2026-02-17
Frequently asked questions
- What is Mary Johansen's NPI number?
- Mary Johansen's National Provider Identifier (NPI) is 1689208928, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Johansen's specialty?
- Mary Johansen is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Johansen located?
- Mary Johansen's practice location on file with NPPES is 4309 W Medical Center Dr Ste A200, Mchenry, IL 60050-8437.
- What is Mary Johansen's phone number?
- The practice phone number listed in the NPPES registry for Mary Johansen is (815) 759-8070.
- Does Mary Johansen accept Medicare?
- Mary Johansen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Johansen's NPI active?
- Yes — Mary Johansen's NPI (1689208928) is active in the NPPES registry as of the last update on 2026-02-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.