91ST AVENUE OPERATIONS LLC
NPI 1659038719
Skilled Nursing Facility in Phoenix, AZ

Active since November 23, 2021CLIA 03D2258029 · Accreditation
5/5
Overall Rating
3000 N 91ST AVE, PHOENIX, AZ 85037(623) 303-2882 Get Directions Write a Review

NPPES record last updated: April 28, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Apr 28, 2026, Nov 23, 2021 (2 updates tracked since 2021).

About 91st Avenue Operations Llc NPPES

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

91ST AVENUE OPERATIONS LLC (NPI 1659038719), doing business as Resolve Diamondback, is a healthcare organization registered as a skilled nursing facility in Phoenix, Arizona and active in the NPI registry since November 2021. The organization holds an CLIA Accreditation certificate valid through February 5, 2028 and lists Yehoshua Seif, Manager, as its authorized official.

NPPES Registry Identity

NPI1659038719
Entity TypeOrganization
Primary Taxonomy314000000X
Legal Business Name91ST AVENUE OPERATIONS LLC
Location Address3000 N 91ST AVEPhoenix, AZ 85037-4037
Mailing Address3000 N 91st AvePhoenix, AZ 85037-4037 · (623) 303-2882
Organization SubpartNo
Authorized OfficialYehoshua SeifManager · (702) 575-3840
Enumeration DateNovember 23, 2021
Last NPPES UpdateApril 28, 20262 updates tracked since enumeration
NPPES CertifiedApril 28, 2026
NPI 1659038719 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtySkilled Nursing FacilityNursing & Custodial Care Facilities
Taxonomy Code314000000X
Definition
(1) A skilled nursing facility is a facility or distinct part of an institution whose primary function is to provide medical, continuous nursing, and other health and social services to patients who are not in an acute phase of illness requiring services in a hospital, but who require primary restorative or skilled nursing services on an inpatient basis above the level of intermediate or custodial care in order to reach a degree of body functioning to permit self care in essential daily living. It meets any licensing or certification standards et forth by the jurisdiction where it is located. A skilled nursing facility may be a freestanding facility or part of a hospital that has been certified by Medicare to admit patients requiring subacute care and rehabilitation; (2) Provides non-acute medical and skilled nursing care services, therapy and social services under the supervision of a licensed registered nurse on a 24-hour basis.
3000 N 91ST AVE, Phoenix, AZ 85037

Other Names 1

Doing Business AsResolve Diamondback

Accepted Insurance

CLIA Laboratory Certificates CMS CLIA

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 Accreditation 03D2258029

91st Avenue Operations, LLC Dba Resolve Diamondback · Phoenix, AZ
Active · expires Feb 5, 2028
CLIA Number03D2258029
Laboratory TypeSkilled Nursing Facility/Nursing Facility
Certificate Effective DateFebruary 6, 2026
Certificate Expiration DateFebruary 5, 2028
Laboratory DirectorDr. William Nassour
Laboratory Phone(480) 203-9562
Laboratory Location91st Avenue Operations, LLC Dba Resolve Diamondback3000 N 91st Ave, Phoenix, AZ 85037
CLIA data matches this NPI record on: Address Name
This is a certificate that is issued to a laboratory on the basis of the laboratory's accreditation by an accreditation organization approved by CMS.

Nursing Home Quality Ratings CMS Care Compare

Quality ratings, staffing and inspection history for Diamondback Healthcare Center (CMS certification number 035302), from CMS Care Compare.

Diamondback Healthcare Center

Nursing home · Phoenix, AZ
5/5 CMS Overall Rating
OwnershipFor profit - Limited Liability company
CMS Certification Number035302
Certified Beds94 beds75 residents per day on average
Medicare & Medicaid Participant SinceJuly 21, 2022
Automatic sprinkler system

CMS Star Ratings

Quality Measures
Based on a select set of clinical quality measures.
5/5
Short-Stay Quality
Quality of care delivered to short-term and rehabilitation residents.
5/5
Staffing
Based on nursing staff hours relative to resident needs.
1/5
Weighted Health Inspection Score
Lower scores are better; the score summarizes deficiencies found on recent inspections.
7.2
Ratings are assigned by CMS on a one-to-five star scale; five is the highest. Categories without a current CMS rating are not shown.

Staffing & Turnover

Total Nurse Staffing
nurse aide 2.55 · LPN 1.76 · RN 0.45
4.76 hrs per resident per day
Weekend Nurse Staffing
4.49 hrs per resident per day
Physical Therapist Staffing
0.16 hrs per resident per day
Nursing Staff Turnover
Share of nursing staff who left the facility within the past year.
47.9%
Registered Nurse Turnover
80%
Higher staffing hours generally allow more direct care time per resident.

Inspections & Enforcement

Facility-Reported Incidents
0
Substantiated Complaints
1
Fines
2 totaling $5,073.58
Medicare Payment Denials
0
Total Penalties
2
Counts come from CMS inspections and complaint investigations over approximately the past three years. CMS Care Compare data as of October 1, 2024.

Other Providers at the Same Location NPPES 3

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

Nurse Practitioner (Psychiatric/Mental Health)
3000 N 91ST AVE
PHOENIX, AZ 85037
Respiratory Therapist, Registered
3000 N 91ST AVE
PHOENIX, AZ 85037
Substance Abuse Rehabilitation Facility
3000 N 91ST AVE
PHOENIX, AZ 85037

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 91st Avenue Operations LLC's NPI number?

The NPI number for 91st Avenue Operations LLC is 1659038719. It was assigned to this organization in the NPPES registry on November 23, 2021. The provider is doing business as Resolve Diamondback.

Where is 91st Avenue Operations LLC located?

91st Avenue Operations LLC is located at 3000 N 91st Ave, Phoenix, AZ 85037. The listed phone number is (623) 303-2882.

What is 91st Avenue Operations LLC's specialty?

The primary specialty registered for this NPI is Skilled Nursing Facility with taxonomy code 314000000X.

Does 91st Avenue Operations LLC hold a CLIA laboratory certificate?

Yes. A Certificate of Accreditation (number 03D2258029) is associated with this NPI, valid through February 5, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

Is 91st Avenue Operations LLC a Medicare-certified nursing home?

Yes. Diamondback Healthcare Center is a Medicare-certified nursing home with 94 certified beds.

What quality rating does 91st Avenue Operations LLC have?

CMS rates Diamondback Healthcare Center 5 out of 5 stars overall on Care Compare. The full measure detail is in the Nursing Home Quality Ratings section above.

What insurance does 91st Avenue Operations LLC accept?

Health plans from Ambetter from Arizona Complete Health, Imperial Insurance Companies, Inc. and UnitedHealthcare list 91st Avenue Operations LLC 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 91st Avenue Operations LLC was last updated on April 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.