DR. MICHAEL NICHOLAS GIANARAKIS M.B.B.S.
NPI 1982389169
Internal Medicine - Gastroenterology in Jacksonville, FL

Q: What is Michael Gianarakis's NPI number?

The NPI number for Michael Gianarakis is 1982389169. It was assigned to this individual provider in the NPPES registry on June 16, 2023.

Q: What is Michael Gianarakis's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Active since June 16, 2023PECOS EnrolledAccepts Medicare Assignment

4500 SAN PABLO RD S, JACKSONVILLE, FL 32224(904) 953-2000 Get Directions Write a Review

NPPES record last updated: May 19, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: May 19, 2026, May 6, 2026, Aug 16, 2023 and 2 more (5 updates tracked since 2023).

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About Dr. Michael Nicholas Gianarakis M.b.b.s. NPPES

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

DR. MICHAEL NICHOLAS GIANARAKIS M.B.B.S. (NPI 1982389169) is an individual gastroenterology provider in Jacksonville, Florida, licensed in Florida (ME179642) and active in the NPI registry since June 2023. He is enrolled in Medicare PECOS, is affiliated with Mayo Clinic, and maintains a secondary practice location in Chicago.

NPPES Registry Identity

NPI1982389169

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. MICHAEL NICHOLAS GIANARAKISCredential: M.B.B.S.

Location Address4500 SAN PABLO RD SJacksonville, FL 32224-1865

Mailing AddressPo Box 860912Minneapolis, MN 55486-0912

Phone(904) 953-2000

Sole ProprietorNo

Medical School CMSOtherGraduated 2023

Enumeration DateJune 16, 2023

Last NPPES UpdateMay 19, 20265 updates tracked since enumeration

NPPES CertifiedMay 19, 2026

✔ NPI 1982389169 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in FL · ME179642

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

Also ListedInternal MedicineTaxonomy 207R00000X · License 125082764 (IL)

4500 SAN PABLO RD S, Jacksonville, FL 32224

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Secondary Practice Location 1

Location 1800 S Wood Street, Suite 1000, MC 675, UI Health, Graduate Medical Education OfficeChicago, IL 60612 · Phone (312) 996-2933

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Florida Blue (BlueCross BlueShield FL), Florida Blue HMO (a BlueCross BlueShield FL company).Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Michael Nicholas Gianarakis M.b.b.s. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8325401904

PECOS Enrollment IDI20260604003829

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 Michael Gianarakis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mayo Clinic Jacksonville

Same address

Health Service

4500 SAN PABLO RD S
Jacksonville, FL 32224

Reassigned Medicare billing, Florida enrollment
1,828 clinicians in this Medicare group

NPI 1174143986 (904) 953-2000

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

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mayo Clinic

Acute Care Hospitals · Jacksonville, FL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number100151

Location4500 San Pablo RdJacksonville, FL 32224 · Duval County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 32224 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

$130.04 typical visit price

range $56.00 – $171.84

Typical copayment $32.51 (range $14.00 – $42.96)

Most-billed visit code 99204

Established Patient

$99.16 typical visit price

range $17.57 – $139.16

Typical copayment $24.79 (range $4.39 – $34.79)

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.

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.

KATHERINE L WALSH PA-C/MPH

Physician Assistant