John Costantino, D.O.
NPI 1235243361 · Nephrology Physician · Phoenix, AZ
Enrolled with Medicare as Order and Referring Only - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Costantino, D.O. is a Nephrology Physician provider in Phoenix, AZ (NPI 1235243361).
Provider details
- NPI number
- 1235243361
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2472 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
- 2006-08-18
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Costantino's NPI number?
- John Costantino's National Provider Identifier (NPI) is 1235243361, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Costantino's specialty?
- John Costantino is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is John Costantino located?
- John Costantino's practice location on file with NPPES is 650 E Indian School Rd, Phoenix, AZ 85012-1839.
- What is John Costantino's phone number?
- The practice phone number listed in the NPPES registry for John Costantino is (602) 277-5551.
- Does John Costantino accept Medicare?
- John Costantino is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Costantino's NPI active?
- Yes — John Costantino's NPI (1235243361) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.