John Mariano, MD
NPI 1548794126 · Medical Oncology Physician · Rochester, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Mariano, MD is a Medical Oncology Physician provider in Rochester, NY (NPI 1548794126).
Provider details
- NPI number
- 1548794126
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 311749 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 yrs in NPPES registry
- Profile completeness38% of score
100% 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
- 2017-04-20
- Last updated
- 2025-05-28
- Certified
- 2025-05-28
Frequently asked questions
- What is John Mariano's NPI number?
- John Mariano's National Provider Identifier (NPI) is 1548794126, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mariano's specialty?
- John Mariano is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Mariano located?
- John Mariano's practice location on file with NPPES is 601 Elmwood Ave, Rochester, NY 14642-0001.
- What is John Mariano's phone number?
- The practice phone number listed in the NPPES registry for John Mariano is (585) 275-2222.
- Does John Mariano accept Medicare?
- John Mariano is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Mariano's NPI active?
- Yes — John Mariano's NPI (1548794126) is active in the NPPES registry as of the last update on 2025-05-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.