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STONE MED, LLC
NPI 1528556495
Internal Medicine in Phoenix, AZ

Active since April 26, 2018CLIA 03D2152510 · Waiver
1327 E CHANDLER BLVD STE 106, PHOENIX, AZ 85048(480) 501-9475(480) 306-7674 Get Directions Write a Review

NPPES record last updated: May 21, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 4, 2022, Feb 18, 2021, Sep 16, 2019 and 2 more (5 updates tracked since 2018).

About Stone Med, Llc NPPES

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

STONE MED, LLC (NPI 1528556495) is a healthcare organization registered as an internal medicine in Phoenix, Arizona and active in the NPI registry since April 2018. The organization holds a CLIA Waiver certificate valid through August 9, 2028 and lists Christina Tretter, Co-owner, as its authorized official.

NPPES Registry Identity

NPI1528556495
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameSTONE MED, LLC
Location Address1327 E CHANDLER BLVD STE 106Phoenix, AZ 85048-6272
Mailing Address1327 E Chandler Blvd Ste 106Phoenix, AZ 85048-6272 · (480) 501-9475 · Fax (480) 306-7674
Phone(480) 501-9475
Fax(480) 306-7674
Organization SubpartNo
Authorized OfficialChristina TretterCo-owner · (480) 501-9475
Enumeration DateApril 26, 2018
Last NPPES UpdateMay 21, 20245 updates tracked since enumeration
NPPES CertifiedMay 21, 2024
✔ NPI 1528556495 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedPhysical Medicine & Rehabilitation · Sports MedicineTaxonomy 2081S0010X
Also ListedPain Medicine · Interventional Pain MedicineTaxonomy 208VP0014X
1327 E CHANDLER BLVD STE 106, Phoenix, AZ 85048
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Other Identifiers 2

Other1073984639AZ · Arizona
Other1346234564AZ · Arizona

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Stone Med, Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Stone Med, LLC, which bills Medicare for the services they deliver. Of these, 1 practice at this address. They are listed nearest first.

Clinicians, nearest first (2)

Christina Tretter, NP-C
Nurse Practitioner
NPI 1073984639
1327 E CHANDLER BLVD STE 106
Phoenix, AZ 85048
(480) 501-9475
✔ PECOS✔ Accepts MedicareSame address
John Tretter, M.D.
Cardiovascular Disease (Cardiology)
NPI 1346234564
803 N SALK DR BUILDINGS A&B
Casa Grande, AZ 85122
(520) 836-6682
✔ PECOS✔ Accepts Medicare35 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

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 Waiver 03D2152510

Stone Med · Phoenix, AZ
Active · expires Aug 9, 2028
CLIA Number03D2152510
Laboratory TypePhysician Office
Certificate Effective DateAugust 10, 2026
Certificate Expiration DateAugust 9, 2028
Laboratory DirectorJohn R. Tretter
Laboratory Phone(480) 501-9475
Laboratory LocationStone Med1327 E Chandler Blvd Ste 106, Phoenix, AZ 85048
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

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 Stone Med, LLC's NPI number?

The NPI number for Stone Med, LLC is 1528556495. It was assigned to this organization in the NPPES registry on April 26, 2018.

Where is Stone Med, LLC located?

Stone Med, LLC is located at 1327 E Chandler Blvd Ste 106, Phoenix, AZ 85048. The listed phone number is (480) 501-9475.

What is Stone Med, LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Stone Med, LLC enrolled in Medicare?

Yes. Stone Med, LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Stone Med, LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Stone Med, LLC, in Cardiovascular Disease (Cardiology) and Nurse Practitioner. 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. Of these, 1 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Stone Med, LLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 03D2152510) is associated with this NPI, valid through August 9, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Stone Med, LLC was last updated on May 21, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.