Active NPI 1891898607 Individual Practitioner Male Practitioner

Dr. Thomas Paul Marnejon , DO

Internal Medicine • Youngstown, OH

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Thomas Marnejon, DO is a certified Internal Medicine practicing in Youngstown, OH. With approximately 39 years of clinical experience since graduating from Philadelphia College Of Osteopathic Medicine in 1987, Dr. Marnejon delivers high-quality medical care to the local community at 1001 COVINGTON ST.

Dr. Marnejon is affiliated with Mercy Health Physicians Youngstown, Llc 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. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1001 Covington St

Youngstown, OH 445101617

Telephone 3304802616

Fax 3304807979

Associated Practice Facility / Clinic

🏢 Mercy Health Youngstown Llc Facility NPI 1679593602

Medicare Profile & Education

Medical School

Philadelphia College Of Osteopathic Medicine

Graduation Year

1987

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Youngstown, OH

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

39 Yrs +17.7 yrs vs City Avg

City Avg: 21.3 Yrs

State Avg: 26.9 Yrs

Regional Practice Density

134 Specialists

Practicing in Youngstown, OH (5516 Statewide)

Telehealth Adoption Rate

5.2% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

36.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Marnejon (39 Years) 39 Yrs

Youngstown Specialty Average (21.3 Years) 21.3 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
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	30	26	$144.93	$92.34
99213 Established patient office or other outpatient visit, typically 15 minutes	19	18	$98.89	$62.75

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	17	15	$144.00	$94.14
99213 Established patient office or other outpatient visit, typically 15 minutes	17	15	$98.00	$63.68

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	29	19	$144.00	$96.36
99213 Established patient office or other outpatient visit, typically 15 minutes	27	21	$98.00	$65.64

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	32	21	$104.00	$70.48
99213 Established patient office or other outpatient visit, typically 15 minutes	28	27	$98.00	$49.56
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	20	15	$144.00	$66.20
99238 Hospital discharge day management, 30 minutes or less	13	11	$111.00	$70.40
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	12	11	$291.00	$196.35
0002A Intramuscular administration of single severe acute respiratory syndrome coronavirus 2 (covid-19) vaccine, mrna-lnp, spike protein, preservative free, 30 mcg/0.3ml dosage, diluent reconstituted; second dose	11	11	$42.00	$37.98

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	36	19	$115.00	$55.54
99213 Established patient office or other outpatient visit, typically 15 minutes	32	27	$96.00	$35.39
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	31	22	$103.00	$71.84
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	30	24	$18.00	$8.46
99238 Hospital discharge day management, 30 minutes or less	16	15	$111.00	$72.16
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	14	14	$291.00	$200.83

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	44	23	$103.00	$71.06
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	43	25	$115.00	$51.08
99213 Established patient office or other outpatient visit, typically 15 minutes	27	24	$96.00	$39.55
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	22	19	$18.00	$8.34
99238 Hospital discharge day management, 30 minutes or less	20	19	$111.00	$71.07
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	12	11	$291.00	$197.60

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	55	29	$103.00	$71.31
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	52	28	$115.00	$51.87
99213 Established patient office or other outpatient visit, typically 15 minutes	43	38	$96.00	$33.15
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	24	24	$18.00	$8.32
99231 Follow-up hospital inpatient care per day, typically 15 minutes	21	14	$56.00	$38.47
99238 Hospital discharge day management, 30 minutes or less	16	16	$104.00	$71.28
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	14	14	$291.00	$198.92

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	69	44	$115.00	$73.38
99213 Established patient office or other outpatient visit, typically 15 minutes	47	37	$96.00	$47.43
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	42	21	$103.00	$70.41

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License OH 34004912

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.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

0866013 (OH)

Commercial Insurance / Payer ID Medicare Ptan

H143790 (OH)

Hospital & Practice Group Affiliations

Mercy Health Physicians Youngstown, Llc

1001 Covington St, Youngstown, OH 445101617

Phone: 3304802616

Mercy Health Physicians Youngstown, Llc

1001 Covington St, Youngstown, OH 445101617

Phone: 3304803033

Mercy Health Physicians Youngstown, Llc

1044 Belmont Ave, Youngstown, OH 445041006

Practice Associates & Co-Workers

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

40 Associated Practitioners

Dr. Michael Van Winkle , DO

Internal Medicine

NPI 1003195454

Doctor of Osteopathic Medicine (D.O.)

Dr. Ayesha Khadka , MD

Internal Medicine

NPI 1003507559

Doctor of Medicine (M.D.)

Dr. John Vincent Reyles , MD

Internal Medicine

NPI 1033968359

Doctor of Medicine (M.D.)

Dr. Joanne Grace Greising , MD

Internal Medicine

NPI 1043748874

Doctor of Medicine (M.D.)

Dr. Akshita Kaushal , MD

Student in an Organized Health Care Education/Training Program

NPI 1053207563

Doctor of Medicine (M.D.)

Dr. Ma. Beatrice Camille Gaviola , MD

Internal Medicine

NPI 1073208013

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

8 Historical Events

📍

Updated Practice Location April 13, 2019

Registered at 1001 COVINGTON ST, YOUNGSTOWN, OH 445101617 (Tel: 3304802616)

📍

Updated Business Mailing Address April 13, 2019

Registered at 1001 COVINGTON ST, YOUNGSTOWN, OH 445101617 (Tel: 3304802616)

✅

NPI Profile Active October 25, 2016

NPI status registered as active in NPPES database

📍

Updated Practice Location October 25, 2016

Registered at 1044 BELMONT AVE, YOUNGSTOWN, OH 445041006 (Tel: 3304803676)

📍

Updated Business Mailing Address October 25, 2016

Registered at 1044 BELMONT AVE, YOUNGSTOWN, OH 445041006 (Tel: 3304803676)

👤

Provider Name / Credentials Updated October 25, 2016

Recorded as THOMAS MARNEJON, DO

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) October 25, 2016

Internal Medicine (License #34004912 in OH)

🟢

Initial NPI Registration & Enumeration September 07, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

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NPI Administrative Meta

NPI Number: 1891898607

Entity Type:

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

Enumeration Date: September 07, 2006

Last Update: April 13, 2019

Sole Proprietor: No

Update or Correct Profile

Mailing Address

1001 Covington St

Youngstown, OH 445101617

Phone: 3304802616

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.