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PALO VERDE HEMATOLOGY ONCOLOGY LTD.
NPI 1447272372
Internal Medicine - Hematology & Oncology in Glendale, AZ

Active since July 23, 2006CLIA Certified · 3 labs
5601 W EUGIE AVE, SUITE 106, GLENDALE, AZ 85304(602) 978-6255(602) 564-9286 Get Directions Write a Review

NPPES record last updated: August 13, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 13, 2025, Jun 26, 2020, Aug 22, 2019 (3 updates tracked since 2019).

About Palo Verde Hematology Oncology Ltd. NPPES

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

PALO VERDE HEMATOLOGY ONCOLOGY LTD. (NPI 1447272372) is a healthcare organization registered as a hematology & oncology in Glendale, Arizona and active in the NPI registry since July 2006. The organization holds 3 active CLIA laboratory certificates, maintains 3 additional practice locations, and lists Lynn Ratzlaff, Cfo/coo, as its authorized official.

NPPES Registry Identity

NPI1447272372
Entity TypeOrganization
Primary Taxonomy207RH0003X
Legal Business NamePALO VERDE HEMATOLOGY ONCOLOGY LTD.
Location Address5601 W EUGIE AVE, SUITE 106Glendale, AZ 85304-1256
Mailing Address5601 W Eugie Ave, Suite 106Glendale, AZ 85304-1256 · (602) 978-6255 · Fax (602) 564-9286
Phone(602) 978-6255
Fax(602) 564-9286
Organization SubpartNo
Authorized OfficialLynn RatzlaffCfo/coo · (602) 978-6255
Enumeration DateJuly 23, 2006
Last NPPES UpdateAugust 13, 20253 updates tracked since enumeration
NPPES CertifiedAugust 13, 2025
✔ NPI 1447272372 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
5601 W EUGIE AVE, Glendale, AZ 85304
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Secondary Practice Locations 3

Location 19250 W Thomas Rd Ste 150Phoenix, AZ 85037-3382 · Phone (602) 978-6255 · Fax (623) 478-1534
Location 27373 N Scottsdale Rd Ste B100Scottsdale, AZ 85253-3553 · Phone (480) 941-1211 · Fax (480) 941-1368
Location 31488 W Elliot RdGilbert, AZ 85233-5196 · Phone (480) 941-1211 · Fax (480) 941-1368

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Cigna HealthCare of Arizona, Inc, Imperial Insurance Companies, Inc..Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Palo Verde Hematology Oncology Ltd. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

7

Medicare enrollment records show 7 clinicians reassign Medicare billing to Palo Verde Hematology Oncology Ltd., which bills Medicare for the services they deliver. Of these, 5 practice at this address and 6 within 10 miles. They are listed nearest first.

Clinicians, nearest first (7)

Nazish Ahmad, D.O
Medical Oncology
NPI 1609187921
5601 W EUGIE AVE
Glendale, AZ 85304
(602) 978-6255
✔ PECOS✔ Accepts MedicareSame address
Maqbool Halepota, M.D.
Hematology/Oncology
NPI 1558384966
5601 W EUGIE AVE STE 106
Glendale, AZ 85304
(602) 978-6255
✔ PECOS✔ Accepts MedicareSame address
Martin Langford, M.D.
Hematology/Oncology
NPI 1992729826
5601 W EUGIE AVE STE 106
Glendale, AZ 85304
(602) 978-6255
✔ PECOS✔ Accepts MedicareSame address
Demetrio Mamani, M.D.
Hematology/Oncology
NPI 1598788499
5601 W EUGIE AVE STE 106
Glendale, AZ 85304
(602) 978-6255
✔ PECOS✔ Accepts MedicareSame address
Amol Rakkar, M.D.
Hematology/Oncology
NPI 1336160241
5601 W EUGIE AVE STE 106
Glendale, AZ 85304
(602) 978-6255
✔ PECOS✔ Accepts MedicareSame address
Haider Zafar, M.D.
Medical Oncology
NPI 1770504698
9250 W THOMAS RD STE 150
Phoenix, AZ 85037
(623) 478-8091
✔ PECOS✔ Accepts Medicare9.8 mi
Rajinder Grover, M.D.
Hematology
NPI 1376561225
7373 N SCOTTSDALE RD STE E100
Scottsdale, AZ 85253
(480) 941-1211
✔ PECOS✔ Accepts Medicare15 mi

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

CLIA Laboratory Certificates CMS CLIA 3

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Compliance 03D2165620

Palo Verde Hematology Oncology, Ltd · Gilbert, AZ
Active · expires Jul 8, 2027
CLIA Number03D2165620
Laboratory TypePhysician Office
Certificate Effective DateJuly 9, 2025
Certificate Expiration DateJuly 8, 2027
Laboratory DirectorAmol Rakkar
Laboratory Phone(480) 941-1211
Laboratory LocationPalo Verde Hematology Oncology, Ltd1488 W Elliot Road, Gilbert, AZ 85233
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

Certificate of Compliance 03D1032321

Palo Verde Hematology Oncology Dba Palo Verde Cancer Specialists · Phoenix, AZ
Active · expires Aug 17, 2027
CLIA Number03D1032321
Laboratory TypePhysician Office
Certificate Effective DateAugust 18, 2025
Certificate Expiration DateAugust 17, 2027
Laboratory DirectorAmol N. Rakkar, MD
Laboratory Phone(623) 478-8091
Laboratory LocationPalo Verde Hematology Oncology Dba Palo Verde Cancer Specialists9250 W Thomas Rd, Ste 150, Phoenix, AZ 85037
CLIA data matches this NPI record on: Address Name
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

Certificate of Compliance 03D1026042

Palo Verde Hematology Oncology, Ltd Dba Palo Verde Cancer Specialists · Scottsdale, AZ
Active · expires Apr 3, 2027
CLIA Number03D1026042
Laboratory TypePhysician Office
Certificate Effective DateApril 4, 2025
Certificate Expiration DateApril 3, 2027
Laboratory DirectorAmol Rakkar, MD
Laboratory Phone(480) 941-1211
Laboratory LocationPalo Verde Hematology Oncology, Ltd Dba Palo Verde Cancer Specialists7373 N Scottsdale Rd Bldg E-100, Scottsdale, AZ 85251
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

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 Palo Verde Hematology Oncology Ltd.'s NPI number?

The NPI number for Palo Verde Hematology Oncology Ltd. is 1447272372. It was assigned to this organization in the NPPES registry on July 23, 2006.

Where is Palo Verde Hematology Oncology Ltd. located?

Palo Verde Hematology Oncology Ltd. is located at 5601 W Eugie Ave Suite 106, Glendale, AZ 85304. The listed phone number is (602) 978-6255.

What is Palo Verde Hematology Oncology Ltd.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Palo Verde Hematology Oncology Ltd. enrolled in Medicare?

Yes. Palo Verde Hematology Oncology Ltd. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Palo Verde Hematology Oncology Ltd.?

According to the CMS Revalidation Reassignment List (October 2026 release), 7 clinicians in 3 Medicare specialties reassign their Medicare billing to Palo Verde Hematology Oncology Ltd.. A 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 the clinician's services. The largest specialties are Hematology/Oncology (4), Medical Oncology (2) and Hematology (1). Of these, 5 practice at this address and 6 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Palo Verde Hematology Oncology Ltd. hold CLIA laboratory certificates?

Yes. 3 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.

What insurance does Palo Verde Hematology Oncology Ltd. accept?

Health plans from Ambetter from Arizona Complete Health, Cigna HealthCare of Arizona, Inc and Imperial Insurance Companies, Inc. list Palo Verde Hematology Oncology Ltd. as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Palo Verde Hematology Oncology Ltd. was last updated on August 13, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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.