John Derzis, DO
NPI 1366138729 · Internal Medicine Physician · Birmingham, AL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Derzis, DO is a Internal Medicine Physician provider in Birmingham, AL (NPI 1366138729).
Provider details
- NPI number
- 1366138729
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- 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 tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-04-17
- Last updated
- 2026-02-04
- Certified
- 2026-02-04
Frequently asked questions
- What is John Derzis's NPI number?
- John Derzis's National Provider Identifier (NPI) is 1366138729, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Derzis's specialty?
- John Derzis is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Derzis located?
- John Derzis's practice location on file with NPPES is 833 Princeton Ave Sw, Birmingham, AL 35211-1323.
- What is John Derzis's phone number?
- The practice phone number listed in the NPPES registry for John Derzis is (205) 783-7694.
- Does John Derzis accept Medicare?
- John Derzis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Derzis's NPI active?
- Yes — John Derzis's NPI (1366138729) is active in the NPPES registry as of the last update on 2026-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.