Active NPI 1043212780 Individual Practitioner Male Practitioner

Dr. Greg J Jun , MD

Internal Medicine • The Villages, FL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Greg Jun, MD is a certified Internal Medicine practicing in The Villages, FL. With approximately 29 years of clinical experience since graduating from Northwestern University Feinberg Medical School in 1997, Dr. Jun delivers high-quality medical care to the local community at 779 KRISTINE WAY.

Dr. Jun maintains professional affiliations with The Villages Health System Llc, Legacy Healthcare Services Inc, Centerwell Senior Primary Care Vitality Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, subsequent hospital care with moderate levelof medical decision making, if using time, at least, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

779 Kristine Way

The Villages, FL 321630099

Telephone 3526746020

Fax 3526746030

Associated Practice Facility / Clinic

🏢 The Villages Health System Llc Facility NPI 1699012922

Medicare Profile & Education

Medical School

Northwestern University Feinberg Medical School

Graduation Year

1997

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in The Villages, FL

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

29 Yrs +3.6 yrs vs City Avg

City Avg: 25.4 Yrs

State Avg: 26.5 Yrs

Regional Practice Density

81 Specialists

Practicing in The Villages, FL (10650 Statewide)

Telehealth Adoption Rate

18.5% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

48.6% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Jun (29 Years) 29 Yrs

The Villages Specialty Average (25.4 Years) 25.4 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2020)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	72	60	$191.42	$106.98
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	43	22	$155.95	$73.59
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	33	20	$239.09	$105.37
99213 Established patient office or other outpatient visit, typically 15 minutes	22	20	$123.00	$73.41
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	11	11	$211.91	$113.80

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	478	286	$184.83	$98.15
99213 Established patient office or other outpatient visit, typically 15 minutes	242	183	$120.21	$67.22
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	137	137	$213.57	$113.01
G0008 Administration of influenza virus vaccine	39	39	$38.00	$15.85
G0009 Administration of pneumococcal vaccine	36	36	$38.00	$15.89
93000 Routine ekg using at least 12 leads including interpretation and report	34	33	$96.00	$16.56
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	30	30	$81.70	$41.38
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	27	25	$255.81	$134.85
90686 Vaccine for influenza for administration into muscle, 0.5 ml dosage	24	24	$30.00	$18.65
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	21	21	$149.76	$111.93
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	20	13	$175.00	$72.81
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	19	19	$275.71	$151.90
90670 Pneumococcal vaccine for injection into muscle	15	15	$308.87	$211.02
90662 Influenza vaccine split virus, preservative free	15	15	$65.00	$54.89
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	13	13	$46.92	$8.53

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	493	287	$182.64	$77.92
99213 Established patient office or other outpatient visit, typically 15 minutes	206	166	$120.30	$50.75
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	110	110	$172.58	$112.53
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	105	49	$50.19	$9.30
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	43	43	$45.72	$8.41
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	30	27	$246.30	$109.70
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	24	24	$246.46	$166.28
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	23	23	$277.36	$128.61
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	22	21	$74.01	$25.46

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	383	226	$216.00	$77.68
99213 Established patient office or other outpatient visit, typically 15 minutes	100	88	$150.00	$50.26
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	83	32	$51.00	$9.05
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	72	70	$41.00	$8.39
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	49	49	$177.00	$111.09
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	35	32	$290.00	$109.73
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	19	19	$340.00	$128.50
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$221.00	$76.26

Medical Specialties & State Licenses

CMS Verified: 2025-08-15

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License FL ME144859

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.

Internal Medicine

NUCC Taxonomy Code: 207R00000X

State License IL 036-105927

Hospital & Practice Group Affiliations

Legacy Healthcare Services Inc

1550 Killingsworth Way, The Villages, FL 321622175

Phone: 3526332971

The Villages Health System Llc

2910 Brownwood Blvd, The Villages, FL 321632032

Phone: 3526741790

Centerwell Senior Primary Care Vitality Inc

779 Kristine Way, The Villages, FL 321630099

Phone: 3526746020

Secondary Practice Locations

1050 Old Camp Rd Ste 100

The Villages, FL 321621762

Phone: 3526741760

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

16 Associated Practitioners

Dr. Ujjwala Jain , MD

Internal Medicine

NPI 1013598978

Doctor of Medicine (M.D.)

Lacey Myers , APRN

Nurse Practitioner - Family

NPI 1063001832

Advanced Practice Registered Nurse

Dr. Janaki Samaraweera , MD

Family Medicine

NPI 1073960514

Doctor of Medicine (M.D.)

Dr. Brooke Thermidor , DO

Family Medicine

NPI 1083787675

Doctor of Osteopathic Medicine (D.O.)

Dr. Joanne Kitson , MD

Internal Medicine

NPI 1124092374

Doctor of Medicine (M.D.)

Dr. Swati Joshi , DO

Internal Medicine

NPI 1144566001

Doctor of Osteopathic Medicine (D.O.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

22 Historical Events

📍

Updated Practice Location August 15, 2025

Registered at 779 KRISTINE WAY, THE VILLAGES, FL 321630099 (Tel: 3526746020)

📍

Updated Business Mailing Address May 11, 2021

Registered at 1020 LAKE SUMTER LNDG, THE VILLAGES, FL 321622699 (Tel: 3526748905)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) May 11, 2021

Internal Medicine (License #036-105927 in IL)

📍

Updated Practice Location July 24, 2020

Registered at 2910 BROWNWOOD BLVD, THE VILLAGES, FL 321632032 (Tel: 3526741790)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 24, 2020

Internal Medicine (License #ME144859 in FL)

📍

Updated Practice Location June 05, 2018

Registered at 650 DAKOTA ST STE A, CRYSTAL LAKE, IL 60012 (Tel: 8154556000)

✅

NPI Profile Active March 17, 2018

NPI status registered as active in NPPES database

📍

Updated Practice Location March 17, 2018

Registered at 650 DAKOTA ST STE A, CRYSTAL LAKE, IL 600123744 (Tel: (815) 455-6000)

📍

Updated Business Mailing Address March 17, 2018

Registered at 650 DAKOTA ST STE A, CRYSTAL LAKE, IL 600123744 (Tel: (815) 455-6000)

👤

Provider Name / Credentials Updated March 17, 2018

Recorded as GREG JUN, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 17, 2018

Internal Medicine (License #036-105927 in IL)

✅

NPI Profile Active August 01, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location August 01, 2017

Registered at 650 DAKOTA ST STE A, CRYSTAL LAKE, IL 600123744 (Tel: (815) 455-6000)

📍

Updated Business Mailing Address August 01, 2017

Registered at 650 DAKOTA ST STE A, CRYSTAL LAKE, IL 600123744 (Tel: (815) 455-6000)

👤

Provider Name / Credentials Updated August 01, 2017

Recorded as GREG JUN, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) August 01, 2017

Internal Medicine (License #036-105927 in IL)

✅

NPI Profile Active July 26, 2012

NPI status registered as active in NPPES database

📍

Updated Practice Location July 26, 2012

Registered at 1445 N HUNT CLUB RD, SUITE 301, GURNEE, IL 600312603 (Tel: 8478550300)

📍

Updated Business Mailing Address July 26, 2012

Registered at 1445 N HUNT CLUB RD, SUITE 301, GURNEE, IL 600312603 (Tel: 8478550300)

👤

Provider Name / Credentials Updated July 26, 2012

Recorded as GREG JUN, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 26, 2012

Internal Medicine (License #036-105927 in IL)

🟢

Initial NPI Registration & Enumeration August 12, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1043212780

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: August 12, 2005

Last Update: August 15, 2025

Sole Proprietor: No

Update or Correct Profile

Mailing Address

1020 Lake Sumter Lndg

The Villages, FL 321622699

Phone: 3526748905

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.