Provider Profile
Mary C. Johansen, APRN, CNP
Unclaimed ProfileAbout Mary Johansen
Mary C. Johansen, APRN, CNP is a nurse practitioner practicing in Mchenry, IL. Mary is also listed as specializing in nurse practitioner — adult health and nurse practitioner — family. According to Medicare claims data, Mary cared for 57 Medicare patients across 77 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes, hospital discharge day management, more than 30 minutes, and initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (815) 759-8070
- Email not available
Practice Locations
4309 W MEDICAL CENTER DR STE A200
Mchenry, IL 60050
Procedures Most Often Billed to Medicare
77 services · 57 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
47 | As often as other peers in Nurse Practitioner |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
18 | Less often than most peers in Nurse Practitioner |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
12 | Less often than most peers in Nurse Practitioner |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other nurse practitioners at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 24 related providers in 3 groups
Other nurse practitioners in Mchenry 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2019 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Mary C. Johansen, APRN?
Mary C. Johansen, APRN is a nurse practitioner in Mchenry, IL. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Mary C. Johansen, APRN's address?
Mary C. Johansen, APRN is listed at 4309 W Medical Center Dr Ste A200, Mchenry, IL 60050. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Mary C. Johansen, APRN?
The number on file is (815) 759-8070. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Mary C. Johansen, APRN's NPI number?
Mary C. Johansen, APRN's National Provider Identifier is 1689208928. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Mary C. Johansen, APRN train?
Mary C. Johansen, APRN attended Other, graduating in 2019. This comes from the CMS National Downloadable File.
CMS public data
How long has Mary C. Johansen, APRN been practicing?
Mary C. Johansen, APRN has 7 years experience. Calculated from a graduation year of 2019, reported in the CMS National Downloadable File.
CMS public data
What procedures does Mary C. Johansen, APRN perform?
According to Medicare billing data, Mary C. Johansen, APRN the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Mary C. Johansen, APRN confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Mary C. Johansen, APRN. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.