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DR. MARIO OTTO M.D., PH.D.
NPI 1306064654
Pediatrics - Pediatric Hematology-Oncology in Phoenix, AZ

Active since April 23, 2007PECOS Enrolled
1919 E THOMAS RD, PHOENIX, AZ 85016(602) 933-0920(602) 933-2492 Get Directions Write a Review

NPPES record last updated: October 12, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 12, 2021, Aug 13, 2021, Jan 8, 2021 (3 updates tracked since 2021).

About Dr. Mario Otto M.d., Ph.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARIO OTTO M.D., PH.D. (NPI 1306064654) is an individual pediatric hematology-oncology provider in Phoenix, Arizona, licensed in Arizona (63758) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1306064654
Entity TypeIndividualMale
Primary Taxonomy2080P0207X
Provider Legal NameDR. MARIO OTTOCredential: M.D., PH.D.
Location Address1919 E THOMAS RDPhoenix, AZ 85016-7710
Mailing Address3200 E Camelback Rd Ste 250Phoenix, AZ 85018-2327 · (602) 933-1814
Phone(602) 933-0920
Fax(602) 933-2492
Sole ProprietorNo
Enumeration DateApril 23, 2007
Last NPPES UpdateOctober 12, 20213 updates tracked since enumeration
NPPES CertifiedOctober 12, 2021
✔ NPI 1306064654 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
Licenses✔ Licensed in AZ · 63758✔ Licensed in WI · 52752-20
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
1919 E THOMAS RD, Phoenix, AZ 85016
Open in Google Maps ↗

Other Identifiers 1

Medicaid097026AZ

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mario Otto M.d., Ph.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Mario Otto reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Phoenix Children's Hospital
Same address
Pediatrics
1919 E THOMAS RD
Phoenix, AZ 85016
  • Reassigned Medicare billing, Arizona enrollment
  • 1,416 clinicians in this Medicare group
NPI 1922112044 (602) 933-1000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. TIMUR RAGHIB M.D.
Hospitalist
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-0777
MRS. MARIA T ESCOBAR CSP, RD
Dietitian, Registered
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (480) 440-2787
DR. AHMAR HUSAIN MD
Anesthesiology (Pediatric Anesthesiology)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-4660
MRS. SOLEE R COWLEY LCSW
Social Worker (Clinical)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-0414
MR. SEAN PATRICK BRADY DO
Anesthesiology (Pediatric Anesthesiology)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-4660
PRIYA PRASHER M.D.
Pediatrics
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-1900
DR. AMIT RAJARAM D.O.
Pediatrics
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-0198
LAURA GARDNER HAMANT
Pediatrics (Pediatric Gastroenterology)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-1000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mario Otto's NPI number?

The NPI number for Mario Otto is 1306064654. It was assigned to this individual provider in the NPPES registry on April 23, 2007.

Where is Mario Otto located?

Mario Otto practices at 1919 E Thomas Rd, Phoenix, AZ 85016. The listed phone number is (602) 933-0920.

What is Mario Otto's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.

Is Mario Otto enrolled in Medicare?

Yes. Mario Otto is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mario Otto's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mario Otto reassigns Medicare benefits to Phoenix Children's Hospital (Phoenix, AZ). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mario Otto's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mario Otto was last updated on October 12, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.