Physician Profile
John David Gatz, MD
Unclaimed ProfileAbout Dr. Gatz
John David Gatz, MD is a healthcare provider in Baltimore, MD specializing in emergency medicine. John trained at Johns Hopkins University School of Medicine, graduating in 2015. John is also listed as specializing in student in an organized health care education program. According to Medicare claims data, John cared for 261 Medicare patients across 284 services.
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
Source: NPPES NPI Registry
Contact Information
- (410) 955-5000
- Email not available
Practice Locations
600 N WOLFE ST THE JOHNS HOPKINS HOSPITAL
Baltimore, MD 21287
Procedures Most Often Billed to Medicare
284 services · 261 patients · 4 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
109 |
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
84 |
| Critical care, first 30-74 minutes | Office visit | 99291 |
46 |
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
45 |
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 emergency medicines at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
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 — 29 related providers in 4 groups
Other emergency medicines in Baltimore 6
Same specialty, same city.
Trained at Johns Hopkins University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2015 at Johns Hopkins University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 7
Providers in MD who bill this service to Medicare most often.
Common questions
What does Dr. Gatz specialize in?
Dr. Gatz is an emergency medicine in Baltimore, MD. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “EMERGENCY MEDICINE”.
NPI registry
Where is Dr. Gatz located?
Dr. Gatz is listed at 600 N WOLFE ST THE JOHNS HOPKINS HOSPITAL, Baltimore, MD 21287. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Gatz's phone number?
The number on file is (410) 955-5000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Gatz's NPI number?
Dr. Gatz's National Provider Identifier is 1588903330. 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. Gatz go to medical school?
Dr. Gatz attended Johns Hopkins University School of Medicine, graduating in 2015. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Gatz been practicing?
Dr. Gatz has 11 years experience. Calculated from a graduation year of 2015, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Gatz do most often?
According to Medicare billing data, Dr. Gatz provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report only, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Gatz confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Gatz. 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.