DR. JOHN R DIAZ MD
NPI 1588616072
Family Medicine in Naples, FL

Q: What is John Diaz's NPI number?

The NPI number for John Diaz is 1588616072. It was assigned to this individual provider in the NPPES registry on May 16, 2006.

Q: What is John Diaz's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for John Diaz was last updated on April 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.

Active since May 16, 2006PECOS EnrolledCLIA 10D2320051 · Waiver

5470 BRYSON CT, NAPLES, FL 34109(239) 631-9832(239) 603-0474 Get Directions Write a Review

NPPES record last updated: April 24, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Dr. John R Diaz Md NPPES

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

DR. JOHN R DIAZ MD (NPI 1588616072) is an individual family medicine provider in Naples, Florida, licensed in Florida (ME34948) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and holds a CLIA Waiver certificate valid through March 11, 2027.

NPPES Registry Identity

NPI1588616072

Entity TypeIndividualMale

Primary Taxonomy207Q00000X

Provider Legal NameDR. JOHN R DIAZCredential: MD

Location Address5470 BRYSON CTNaples, FL 34109-6000

Mailing Address2675 Winkler Ave Fl 2Fort Myers, FL 33901-9342 · (877) 856-3774

Phone(239) 631-9832

Fax(239) 603-0474

Sole ProprietorNo

Enumeration DateMay 16, 2006

Last NPPES UpdateApril 24, 2025

NPPES CertifiedApril 24, 2025

✔ NPI 1588616072 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in FL · ME34948

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

5470 BRYSON CT, Naples, FL 34109

Open in Google Maps ↗

Other Identifiers 1

Other05938FL · Fl Bc

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Cigna Healthcare, Cigna HealthCare of Florida, Inc..Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. John R Diaz Md 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 Reassignments

Medicare enrollment records show John Diaz reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Essence Of Health Of Naples Inc

Same address

General Practice

5470 BRYSON CT
Naples, FL 34109

Reassigned Medicare billing, Florida enrollment
2 clinicians in this Medicare group

NPI 1003644840 (239) 877-8522

John Rufo Diaz MD

Same address

Family Medicine

5470 BRYSON CT
Naples, FL 34109

Reassigned Medicare billing, Florida enrollment

NPI 1780489765 (239) 451-9747

Millennium Physician Group LLC

23 mi

Family Medicine

6321 DANIELS PKWY
Fort Myers, FL 33912

Reassigned Medicare billing, Florida enrollment
1,278 clinicians in this Medicare group

NPI 1811122880 (877) 856-3774

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 10D2320051

John Rufo Diaz MD LLC · Naples, FL

Active · expires Mar 11, 2027

CLIA Number10D2320051

Laboratory TypePhysician Office

Certificate Effective DateMarch 12, 2025

Certificate Expiration DateMarch 11, 2027

Laboratory DirectorJohn R. Diaz

Laboratory Phone(239) 631-9832

Laboratory LocationJohn Rufo Diaz MD LLC5470 Bryson Court, Naples, FL 34109

CLIA data matches this NPI record on: Address Phone

This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 19

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

454 services205 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

340 services167 patients

Blood test, lipids (cholesterol and triglycerides) 80061

A lipid panel is a blood test that measures fats and fatty substances, such as cholesterol and triglycerides. These substances are used by your body as a source of energy. High levels can lead to health issues, including heart disease.

315 services142 patients

Blood test, comprehensive group of blood chemicals 80053

A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.

273 services160 patients

Blood test, thyroid stimulating hormone (tsh) 84443

A TSH blood test measures the level of thyroid stimulating hormone in your body. This hormone is produced by the pituitary gland and regulates how your thyroid works. It's a simple procedure where a small amount of blood is drawn from your arm for analysis.

150 services111 patients

Uric acid level, blood 84550

A blood uric acid level test measures the amount of uric acid in your blood. Uric acid is a waste product that your body produces when it breaks down purines, substances found in your body and in certain foods. High levels may lead to gout or kidney stones.

149 services114 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

103 services79 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

69 services69 patients

Annual depression screening, 5 to 15 minutes G0444

An annual depression screening is a short, routine evaluation to check for signs of depression. It involves answering a series of questions about your feelings, thoughts, and behaviors. The process takes about 15 minutes and helps detect depression early for better management.

69 services69 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

60 services54 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

44 services38 patients

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

43 services23 patients

Urine microalbumin (protein) level 82043

The urine microalbumin level test measures the amount of a protein called albumin in your urine. This test helps to detect early signs of kidney damage. High levels of albumin may suggest your kidneys aren't functioning properly. It's a simple, non-invasive test that involves providing a urine sample.

35 services21 patients

Creatinine level to test for kidney function or muscle injury 82570

A creatinine level test measures the amount of creatinine in your blood. This substance is a waste product from normal muscle use. Higher levels can indicate possible kidney dysfunction or muscle injury. This test helps monitor kidney health.

35 services21 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

25 services24 patients

Cyanocobalamin (vitamin b-12) level 82607

A Cyanocobalamin (Vitamin B-12) level test is a blood test that checks the amount of Vitamin B-12 in your body. This vitamin is vital for nerve function and the creation of red blood cells. Low or high levels could indicate a potential health issue.

13 services12 patients

Folic acid level, serum 82746

A Folic Acid Level, Serum test measures the amount of folic acid, a type of B vitamin, in your blood. This vitamin is important for cell growth and development. It's crucial for your body to function well. If your levels are low, it may indicate a deficiency, which can lead to health issues.

13 services12 patients

Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use 90677

The Pneumococcal Conjugate Vaccine (PCV20) is a shot given to protect against 20 types of bacteria that can cause serious infections like pneumonia and meningitis. It's administered through a muscle, usually in the arm. It's important for overall health.

12 services12 patients

Administration of pneumococcal vaccine G0009

The pneumococcal vaccine helps protect against pneumococcal bacteria, which can cause severe infections like pneumonia and meningitis. The vaccine is given as an injection, typically in the arm. It's recommended for infants, older adults, and those with certain health conditions.

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 34109 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$91.69 typical visit price

range $58.56 – $179.05

Typical copayment $22.92 (range $14.64 – $44.76)

Most-billed visit code 99203

Established Patient

$103.21 typical visit price

range $18.44 – $144.68

Typical copayment $25.80 (range $4.61 – $36.17)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Collagen dressing, sterile, size 16 sq. in. or less, each A6021

DME-Medical/Surgical Supplies · category DA023N

1 supplier13 claims2,080 services$19.18 avg. paid by Medicare

Hydrocolloid dressing, wound cover, sterile, pad size more than 16 sq. in. but less than or equal to 48 sq. in., with any size adhesive border, each dressing A6238

DME-Medical/Surgical Supplies · category DA023N

1 supplier13 claims780 services$20.81 avg. paid by Medicare

Home ventilator, multi-function respiratory device, also performs any or all of the additional functions of oxygen concentration, drug nebulization, aspiration, and cough stimulation, includes all accessories, components and supplies for all functions E0467

DME-Other DME · category DE005N

1 supplier12 claims12 services$1,062.52 avg. paid by Medicare

Ultraviolet light therapy system panel, includes bulbs/lamps, timer and eye protection, 6 foot panel E0693

DME-Other DME · category DE000N

1 supplier13 claims13 services$1,334.07 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

ESSENCE OF HEALTH OF NAPLES INC

General Practice

5470 BRYSON CT
NAPLES, FL 34109

Collier County (239) 877-8522

KIMBERLY READ DIAZ DNP, ARNP, NP-C

Nurse Practitioner (Family)

5470 BRYSON CT
NAPLES, FL 34109

Collier County (239) 451-9747

JOHN RUFO DIAZ MD

Family Medicine

5470 BRYSON CT
NAPLES, FL 34109

Collier County (239) 451-9747

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 John Diaz's NPI number?

The NPI number for John Diaz is 1588616072. It was assigned to this individual provider in the NPPES registry on May 16, 2006.

Where is John Diaz located?

John Diaz practices at 5470 Bryson Ct, Naples, FL 34109. The listed phone number is (239) 631-9832.

What is John Diaz's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is John Diaz enrolled in Medicare?

Yes. John Diaz is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for John Diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Diaz reassigns Medicare benefits to 3 organizations: Essence Of Health Of Naples Inc (Naples, FL), John Rufo Diaz MD (Naples, FL) and Millennium Physician Group LLC (Fort Myers, FL). Each 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 John Diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Does John Diaz hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 10D2320051) is associated with this NPI, valid through March 11, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does John Diaz accept?

Health plans from Cigna HealthCare of Florida, Inc. and Cigna Healthcare list John Diaz 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 John Diaz was last updated on April 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.

About Dr. John R Diaz Md NPPES

NPPES Registry Identity

Specialties & Licenses

Other Identifiers 1

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare Enrollment Status

Medicare Billing Reassignments

CLIA Laboratory Certificates CMS CLIA

Certificate of Waiver · 10D2320051

Areas of Expertise CMS Part B claims 19

Physician Visit Costs CMS claims · ZIP area

Referred Medical Equipment & Supplies CMS DME claims 4

Other Providers at the Same Location NPPES 3

Frequently Asked Questions NPPES & CMS

What is John Diaz's NPI number?

Where is John Diaz located?

What is John Diaz's specialty?

Is John Diaz enrolled in Medicare?

Which organizations bill Medicare for John Diaz's services?

Does John Diaz hold a CLIA laboratory certificate?

What insurance does John Diaz accept?

When was this NPI record last updated?

Certificate of Waiver 10D2320051