Active NPI 1275795528 Individual Practitioner Male Practitioner

Dr. Jonathan Walton Marsh , MD

Internal Medicine • Naples, FL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Jonathan Marsh, MD is a certified Internal Medicine practicing in Naples, FL. With approximately 18 years of clinical experience since graduating from Medical University Of South Carolina College Of Medicine in 2008, Dr. Marsh delivers high-quality medical care to the local community at 2338 IMMOKALEE RD.

Dr. Marsh is affiliated with Naples Concierge Healthcare 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, hospital discharge day management, more than. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

2338 Immokalee Rd
Suite 186

Naples, FL 341101445

Telephone 2393302933

Associated Practice Facility / Clinic

🏢 Doctors At Home Inc Facility NPI 1538533534

Medicare Profile & Education

Medical School

Medical University Of South Carolina College Of Medicine

Graduation Year

2008

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Naples, FL

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

18 Yrs -5.2 yrs vs City Avg

City Avg: 23.2 Yrs

State Avg: 26.5 Yrs

Regional Practice Density

232 Specialists

Practicing in Naples, FL (10650 Statewide)

Telehealth Adoption Rate

19.8% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

71.8% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Marsh (18 Years) 18 Yrs

Naples Specialty Average (23.2 Years) 23.2 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	27	11	$325.00	$91.79

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	198	113	$313.00	$81.34
99239 Hospital discharge day management, more than 30 minutes	90	89	$468.00	$117.67
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	88	57	$451.00	$122.46
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	19	19	$600.00	$134.79
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	15	15	$884.00	$166.79

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	657	269	$313.00	$73.80
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	162	109	$451.00	$105.97
99239 Hospital discharge day management, more than 30 minutes	150	144	$468.00	$107.54
99217 Hospital observation care on day of discharge	60	59	$317.00	$72.84
99497 Advance care planning, first 30 minutes	45	39	$697.00	$80.41
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	41	41	$884.00	$193.17
99219 Hospital observation care, typically 50 minutes	30	30	$589.00	$136.94
99220 Hospital observation care, typically 70 minutes	25	25	$806.00	$185.17
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	18	18	$600.00	$140.95

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	486	266	$313.00	$74.06
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	267	175	$451.00	$107.11
99239 Hospital discharge day management, more than 30 minutes	191	179	$468.00	$109.20
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	107	102	$884.00	$208.74
99497 Advance care planning, first 30 minutes	62	56	$697.00	$81.53
99217 Hospital observation care on day of discharge	56	56	$317.00	$74.95
99220 Hospital observation care, typically 70 minutes	34	33	$806.00	$189.34
99238 Hospital discharge day management, 30 minutes or less	24	24	$317.00	$74.95
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	23	23	$600.00	$142.42
99219 Hospital observation care, typically 50 minutes	16	16	$589.00	$136.43

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	474	254	$235.00	$76.47
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	373	217	$338.00	$110.40
99239 Hospital discharge day management, more than 30 minutes	184	180	$351.00	$112.84
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	86	85	$663.00	$215.03
99497 Advance care planning, first 30 minutes	76	67	$263.00	$83.55
99217 Hospital observation care on day of discharge	56	55	$238.00	$76.86
99220 Hospital observation care, typically 70 minutes	31	31	$604.00	$196.69
99291 Critical care, first 30-74 minutes	22	19	$903.00	$229.89
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	12	12	$451.00	$147.58
99238 Hospital discharge day management, 30 minutes or less	12	12	$238.00	$77.33

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	759	394	$235.00	$75.57
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	357	209	$338.00	$108.21
99239 Hospital discharge day management, more than 30 minutes	241	232	$351.00	$110.04
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	163	160	$663.00	$210.78
99220 Hospital observation care, typically 70 minutes	93	93	$604.00	$193.30
99217 Hospital observation care on day of discharge	88	86	$238.00	$75.93
99497 Advance care planning, first 30 minutes	74	71	$444.34	$81.08
99306 Initial nursing facility visit, typically 45 minutes per day	49	49	$550.00	$172.66
99219 Hospital observation care, typically 50 minutes	32	31	$442.00	$141.70
99238 Hospital discharge day management, 30 minutes or less	30	30	$238.00	$75.89
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	28	28	$451.00	$143.26
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	22	13	$227.00	$71.36
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	15	11	$299.00	$95.00
99291 Critical care, first 30-74 minutes	12	12	$903.00	$234.32
99225 Subsequent observation care, typically 25 minutes per day	11	11	$236.00	$76.23

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	831	358	$235.00	$74.37
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	436	210	$338.00	$105.90
99239 Hospital discharge day management, more than 30 minutes	323	297	$351.00	$109.66
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	183	176	$663.00	$206.86
99217 Hospital observation care on day of discharge	124	122	$238.00	$74.69
99497 Advance care planning, first 30 minutes	93	86	$760.00	$80.79
99220 Hospital observation care, typically 70 minutes	89	89	$604.00	$190.66
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	58	29	$227.00	$70.56
99306 Initial nursing facility visit, typically 45 minutes per day	28	27	$550.00	$169.72
99236 Initial hospital care with same-day admission and discharge with high level of medical decision making, per day, if using time, at least 85 minutes	25	25	$711.00	$223.32
99238 Hospital discharge day management, 30 minutes or less	22	22	$238.00	$71.30
99219 Hospital observation care, typically 50 minutes	20	20	$442.00	$139.35
99291 Critical care, first 30-74 minutes	19	18	$903.00	$229.80
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	18	18	$451.00	$140.59
99225 Subsequent observation care, typically 25 minutes per day	15	13	$236.00	$74.60
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	15	13	$299.00	$93.34
99316 Nursing facility discharge management, more than 30 minutes	14	14	$458.48	$108.15

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	803	397	$157.13	$74.84
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	405	229	$226.00	$107.73
99239 Hospital discharge day management, more than 30 minutes	332	301	$234.00	$111.34
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	173	171	$442.00	$211.31
99217 Hospital observation care on day of discharge	127	126	$158.00	$75.06
99220 Hospital observation care, typically 70 minutes	95	93	$402.00	$192.99
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	64	64	$328.84	$143.10
99238 Hospital discharge day management, 30 minutes or less	60	60	$158.00	$75.06
99225 Subsequent observation care, typically 25 minutes per day	31	27	$158.00	$75.59
99236 Initial hospital care with same-day admission and discharge with high level of medical decision making, per day, if using time, at least 85 minutes	17	17	$474.00	$226.60
99291 Critical care, first 30-74 minutes	15	14	$602.00	$234.66
99219 Hospital observation care, typically 50 minutes	13	12	$294.00	$141.38

Medical Specialties & State Licenses

CMS Verified: 2025-08-12

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License FL ME113346

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 SC LL 30910

Internal Medicine

NUCC Taxonomy Code: 207R00000X

State License SC MD30910

Hospitalist

NUCC Taxonomy Code: 208M00000X

State License FL ME113346

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Hospital & Practice Group Affiliations

Naples Concierge Healthcare

700 2nd Ave N, Naples, FL 341025702

Phone: 2396906286

Secondary Practice Locations

700 2nd Ave N

Naples, FL 341025756

Phone: 2394316873

Practice Associates & Co-Workers

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

31 Associated Practitioners

Dr. Christopher Bertely , MD

Hospitalist

NPI 1003303504

Doctor of Medicine (M.D.)

Dr. Frank Elterman , DO

Hospitalist

NPI 1013357185

Doctor of Osteopathic Medicine (D.O.)

Moises Exposito , APRN

Nurse Practitioner - Family

NPI 1013569417

Advanced Practice Registered Nurse

Dr. Curtis Dedrick , DO

Internal Medicine

NPI 1023012978

Doctor of Osteopathic Medicine (D.O.)

Dr. Charlene Deluca , MD

Internal Medicine

NPI 1093748279

Doctor of Medicine (M.D.)

Dr. David Allan , MD

Hospitalist

NPI 1104318682

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

11 Historical Events

✅

NPI Profile Active September 21, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location September 21, 2017

Registered at 2338 IMMOKALEE RD, SUITE 186, NAPLES, FL 341101445 (Tel: 2393302933)

📍

Updated Business Mailing Address September 21, 2017

Registered at 2338 IMMOKALEE RD, SUITE 186, NAPLES, FL 341101445 (Tel: 2393302933)

👤

Provider Name / Credentials Updated September 21, 2017

Recorded as JONATHAN MARSH, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) September 21, 2017

Internal Medicine (License #MD30910 in SC)

✅

NPI Profile Active November 07, 2013

NPI status registered as active in NPPES database

📍

Updated Practice Location November 07, 2013

Registered at 2338 IMMOKALEE RD, SUITE 186, NAPLES, FL 341101445 (Tel: 2393302933)

📍

Updated Business Mailing Address November 07, 2013

Registered at 2338 IMMOKALEE RD, SUITE 186, NAPLES, FL 341101445 (Tel: 2393302933)

👤

Provider Name / Credentials Updated November 07, 2013

Recorded as JONATHAN MARSH, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) November 07, 2013

Internal Medicine (License #ME113346 in FL)

🟢

Initial NPI Registration & Enumeration June 27, 2008

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: 1275795528

Entity Type:

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

Enumeration Date: June 27, 2008

Last Update: August 12, 2025

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

2338 Immokalee Rd, Suite 186

Naples, FL 341101445

Phone: 2393302933

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.