Guillermo Gutierrez-Calleros, MD
NPI 1649200734 · Neonatal-Perinatal Medicine Physician · Phoenix, AZ
Enrolled with Medicare as Order and Referring Only - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guillermo Gutierrez-Calleros, MD is a Neonatal-Perinatal Medicine Physician provider in Phoenix, AZ (NPI 1649200734).
Provider details
- NPI number
- 1649200734
- Entity type
- Individual
- Primary specialty
- Neonatal-Perinatal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 16667 (AZ)
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
20 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
- 2006-07-04
- Last updated
- 2013-05-13
Frequently asked questions
- What is Guillermo Gutierrez-Calleros's NPI number?
- Guillermo Gutierrez-Calleros's National Provider Identifier (NPI) is 1649200734, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guillermo Gutierrez-Calleros's specialty?
- Guillermo Gutierrez-Calleros is listed in the NPPES registry with a primary specialty of Neonatal-Perinatal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Guillermo Gutierrez-Calleros located?
- Guillermo Gutierrez-Calleros's practice location on file with NPPES is 4722 N 24th St, Phoenix, AZ 85016-4800.
- What is Guillermo Gutierrez-Calleros's phone number?
- The practice phone number listed in the NPPES registry for Guillermo Gutierrez-Calleros is (602) 256-4628.
- Does Guillermo Gutierrez-Calleros accept Medicare?
- Guillermo Gutierrez-Calleros is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Guillermo Gutierrez-Calleros's NPI active?
- Yes — Guillermo Gutierrez-Calleros's NPI (1649200734) is active in the NPPES registry as of the last update on 2013-05-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.