Provider Profile
John Hagan, CRNP
Unclaimed ProfileAbout John Hagan
No biography has been added yet. Is this you? Claim this profile to add one.
Education & Training
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (410) 328-8141
- Email not available
Practice Locations
827 LINDEN AVE
Baltimore, MD 21201
Procedures Most Often Billed to Medicare
534 services · 18 patients · 1 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
534 |
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 Baltimore 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2005 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Hagan specialize in?
Dr. Hagan is a nurse practitioner in Baltimore, MD. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “NURSE PRACTITIONER”.
NPI registry
Where is Dr. Hagan located?
Dr. Hagan is listed at 827 LINDEN AVE, Baltimore, MD 21201. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Hagan's phone number?
The number on file is (410) 328-8141. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Hagan's NPI number?
Dr. Hagan's National Provider Identifier is 1740489970. 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 Dr. Hagan go to medical school?
Dr. Hagan attended Other, graduating in 2005. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Hagan been practicing?
Dr. Hagan has 21 years experience. Calculated from a graduation year of 2005, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Hagan do most often?
According to Medicare billing data, Dr. Hagan 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 Dr. Hagan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Hagan. 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.