John Gatz, MD
NPI 1588903330 · Emergency Medicine Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Gatz, MD is a Emergency Medicine Physician provider in Baltimore, MD (NPI 1588903330).
Provider details
- NPI number
- 1588903330
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
284 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 109 | $8 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 84 | $178 |
| Critical Care, First 30-74 Minutes99291 | 46 | $217 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 45 | $123 |
Typical Medicare-allowed amounts for these services range $8–$217 (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.
Practice location
Mailing address
Additional practice locations (1)
- 22 S Greene StBaltimore, MD 21201-1544Phone: (410) 328-9595
Registry dates
- Enumerated
- 2013-02-13
- Last updated
- 2018-07-23
Frequently asked questions
- What is John Gatz's NPI number?
- John Gatz's National Provider Identifier (NPI) is 1588903330, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Gatz's specialty?
- John Gatz is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Gatz located?
- John Gatz's practice location on file with NPPES is 600 N Wolfe St, Baltimore, MD 21287.
- What is John Gatz's phone number?
- The practice phone number listed in the NPPES registry for John Gatz is (410) 955-5000.
- Does John Gatz accept Medicare?
- John Gatz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Gatz's NPI active?
- Yes — John Gatz's NPI (1588903330) is active in the NPPES registry as of the last update on 2018-07-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.