Active NPI 1861486839 Individual Practitioner Male Practitioner

Dr. John L Gwin , MD

Surgery • Chattanooga, TN

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. John Gwin, MD is a certified Surgery practicing in Chattanooga, TN. With approximately 42 years of clinical experience since graduating from Yale University School Of Medicine in 1984, Dr. Gwin delivers high-quality medical care to the local community at 721 GLENWOOD DR.

Dr. Gwin is affiliated with Memorial Health Partners Foundation, Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include removal of skin and tissue, 20.0 sq cm or less, established patient outpatient office visit, management and supervision of oxygen chamber therapy per session. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

721 Glenwood Dr
Suite 553

Chattanooga, TN 374041106

Telephone 4234952640

Fax 4234952644

Associated Practice Facility / Clinic

🏢 Robert M. Barnett, Iii, Md Facility NPI 1609946748

Medicare Profile & Education

Medical School

Yale University School Of Medicine

Graduation Year

1984

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Chattanooga, TN

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

42 Yrs +12.3 yrs vs City Avg

City Avg: 29.7 Yrs

State Avg: 26.3 Yrs

Regional Practice Density

38 Specialists

Practicing in Chattanooga, TN (682 Statewide)

Telehealth Adoption Rate

2.6% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

71.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Gwin (42 Years) 42 Yrs

Chattanooga Specialty Average (29.7 Years) 29.7 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
11042 Removal of skin and tissue, 20.0 sq cm or less	315	87	$359.00	$54.57
99213 Established patient office or other outpatient visit, typically 15 minutes	264	82	$189.00	$61.25
99183 Management and supervision of oxygen chamber therapy per session	190	12	$425.00	$97.06
11043 Removal of muscle and/or tissue, 20.0 sq cm or less	75	37	$644.00	$139.96
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	64	43	$117.00	$32.78
97597 Removal of tissue from wound, 20.0 sq cm or less	61	20	$121.00	$33.07
99231 Follow-up hospital inpatient care per day, typically 15 minutes	47	21	$96.00	$45.78
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	39	27	$269.00	$90.29
11045 Removal of skin and tissue, each additional 20.0 sq cm or less	29	15	$75.00	$22.92
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	21	21	$232.00	$75.77
99213 Established patient office or other outpatient visit, typically 15 minutes	19	18	$189.00	$83.88
11044 Removal of bone, 20.0 sq cm or less	17	12	$791.00	$198.94
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	15	15	$327.33	$123.54
99221 Initial hospital inpatient care per day, typically 30 minutes	14	13	$196.00	$72.53
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	12	12	$117.00	$52.05

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	401	88	$359.00	$54.69
99213 Established patient office or other outpatient visit, typically 15 minutes	209	68	$184.26	$61.48
99183 Management and supervision of oxygen chamber therapy per session	209	17	$425.00	$99.15
11045 Removal of skin and tissue, each additional 20.0 sq cm or less	78	12	$75.00	$23.25
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	72	44	$116.14	$33.13
99213 Established patient office or other outpatient visit, typically 15 minutes	71	47	$184.56	$84.11
11043 Removal of muscle and/or tissue, 20.0 sq cm or less	55	25	$644.00	$136.57
99231 Follow-up hospital inpatient care per day, typically 15 minutes	36	23	$96.00	$45.76
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	27	20	$255.67	$92.15
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	21	21	$310.00	$125.47
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	21	19	$112.57	$51.46
99221 Initial hospital inpatient care per day, typically 30 minutes	19	18	$196.00	$77.91
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	18	18	$229.11	$74.68
11044 Removal of bone, 20.0 sq cm or less	13	11	$791.00	$200.02

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	275	78	$359.00	$54.67
99183 Management and supervision of oxygen chamber therapy per session	195	16	$425.00	$100.72
99213 Established patient office or other outpatient visit, typically 15 minutes	171	55	$137.82	$62.96
99213 Established patient office or other outpatient visit, typically 15 minutes	108	68	$137.41	$84.25
15275 Application of skin substitute graft to wound of face, scalp, eyelids, mouth, neck, ears, around eyes, genitals, hands, feet, fingers, or toes, 25.0 sq cm or less of wound 100.0 sq cm or less	92	17	$283.00	$85.45
11043 Removal of muscle and/or tissue, 20.0 sq cm or less	59	28	$644.00	$138.96
99231 Follow-up hospital inpatient care per day, typically 15 minutes	48	19	$96.00	$33.08
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	39	29	$86.00	$34.15
11046 Removal of muscle and/or tissue, each additional 20.0 sq cm or less	29	12	$161.00	$51.16
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	26	22	$188.00	$93.40
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	26	21	$185.00	$120.87
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	23	18	$86.00	$52.36
11044 Removal of bone, 20.0 sq cm or less	23	14	$791.00	$204.35
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	20	20	$183.05	$78.38
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	16	16	$310.00	$127.69
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	16	16	$180.69	$104.68

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	371	103	$359.00	$54.20
99183 Management and supervision of oxygen chamber therapy per session	253	15	$425.00	$102.55
99213 Established patient office or other outpatient visit, typically 15 minutes	253	70	$136.00	$63.69
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	140	45	$86.00	$34.14
99213 Established patient office or other outpatient visit, typically 15 minutes	103	72	$136.00	$84.58
15275 Application of skin substitute graft to wound of face, scalp, eyelids, mouth, neck, ears, around eyes, genitals, hands, feet, fingers, or toes, 25.0 sq cm or less of wound 100.0 sq cm or less	101	11	$283.00	$89.69
11045 Removal of skin and tissue, each additional 20.0 sq cm or less	42	17	$75.00	$23.74
11044 Removal of bone, 20.0 sq cm or less	41	17	$791.00	$207.23
11043 Removal of muscle and/or tissue, 20.0 sq cm or less	40	22	$644.00	$145.96
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	39	39	$179.00	$79.76
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	32	24	$183.00	$95.57
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	26	24	$183.00	$123.14
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	26	23	$86.00	$52.93
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	23	23	$179.00	$106.02
99221 Initial hospital inpatient care per day, typically 30 minutes	22	20	$196.00	$95.32

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	396	104	$359.00	$58.40
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	331	85	$86.00	$24.95
99183 Management and supervision of oxygen chamber therapy per session	195	12	$425.00	$104.69
15271 Application of skin substitute graft to wound of trunk, arms, or legs, 25.0 sq cm or less of wound 100.0 sq cm or less	138	18	$264.00	$79.42
15275 Application of skin substitute graft to wound of face, scalp, eyelids, mouth, neck, ears, around eyes, genitals, hands, feet, fingers, or toes, 25.0 sq cm or less of wound 100.0 sq cm or less	129	15	$283.00	$94.24
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	87	67	$86.00	$42.54
99213 Established patient office or other outpatient visit, typically 15 minutes	70	62	$136.00	$71.01
99213 Established patient office or other outpatient visit, typically 15 minutes	69	49	$136.00	$48.66
11045 Removal of skin and tissue, each additional 20.0 sq cm or less	57	25	$75.00	$25.38
11043 Removal of muscle and/or tissue, 20.0 sq cm or less	52	29	$644.00	$145.52
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	40	40	$179.00	$73.27
99231 Follow-up hospital inpatient care per day, typically 15 minutes	22	12	$96.00	$38.15
99221 Initial hospital inpatient care per day, typically 30 minutes	21	20	$193.71	$98.79
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	21	21	$179.00	$98.82
11044 Removal of bone, 20.0 sq cm or less	20	13	$791.00	$220.87
99202 New patient office or other outpatient visit, typically 20 minutes	18	18	$121.00	$72.11
99202 New patient office or other outpatient visit, typically 20 minutes	15	15	$121.00	$48.85
15004 Preparation of skin graft site of face, scalp, eyelids, mouth, neck, ears, around eyes, genitals, hands, feet, fingers, or toes, 100.0 sq cm or 1% body area for infants and children, or less	13	12	$891.00	$257.83

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	196	51	$359.00	$56.58
99213 Established patient office or other outpatient visit, typically 15 minutes	142	97	$136.00	$69.27
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	136	44	$86.00	$23.85
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	109	63	$86.00	$42.12
99213 Established patient office or other outpatient visit, typically 15 minutes	99	35	$135.99	$45.45
99183 Management and supervision of oxygen chamber therapy per session	91	12	$425.00	$103.35
99231 Follow-up hospital inpatient care per day, typically 15 minutes	56	20	$96.00	$37.67
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	45	45	$179.00	$100.90
99221 Initial hospital inpatient care per day, typically 30 minutes	21	21	$148.00	$93.27
11043 Removal of muscle and/or tissue, 20.0 sq cm or less	18	12	$644.00	$139.00
99202 New patient office or other outpatient visit, typically 20 minutes	14	14	$121.00	$71.60
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	13	13	$179.00	$67.84
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	11	11	$287.00	$130.86

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	322	73	$374.07	$57.61
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	307	88	$72.37	$23.79
99183 Management and supervision of oxygen chamber therapy per session	187	29	$292.38	$104.12
99213 Established patient office or other outpatient visit, typically 15 minutes	145	106	$104.34	$67.95
11045 Removal of skin and tissue, each additional 20.0 sq cm or less	144	26	$76.21	$24.91
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	98	64	$77.58	$40.75
99231 Follow-up hospital inpatient care per day, typically 15 minutes	97	40	$92.08	$37.11
99213 Established patient office or other outpatient visit, typically 15 minutes	88	48	$102.76	$48.31
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	45	45	$158.33	$100.39
99221 Initial hospital inpatient care per day, typically 30 minutes	41	39	$163.22	$95.62
11044 Removal of bone, 20.0 sq cm or less	30	20	$826.27	$216.77
11043 Removal of muscle and/or tissue, 20.0 sq cm or less	27	21	$673.56	$141.13
99202 New patient office or other outpatient visit, typically 20 minutes	23	23	$117.35	$69.89
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	23	23	$149.35	$72.18
99202 New patient office or other outpatient visit, typically 20 minutes	19	19	$114.00	$47.62
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	13	13	$253.15	$130.02

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	481	127	$380.00	$56.47
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	402	129	$71.00	$23.94
99183 Management and supervision of oxygen chamber therapy per session	287	22	$225.00	$102.51
99213 Established patient office or other outpatient visit, typically 15 minutes	186	123	$91.00	$67.84
99213 Established patient office or other outpatient visit, typically 15 minutes	186	98	$91.00	$48.31
11045 Removal of skin and tissue, each additional 20.0 sq cm or less	111	27	$77.00	$24.71
15271 Application of skin substitute graft to wound of trunk, arms, or legs, 25.0 sq cm or less of wound 100.0 sq cm or less	76	18	$512.00	$79.56
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	70	70	$148.00	$71.26
99231 Follow-up hospital inpatient care per day, typically 15 minutes	59	30	$91.00	$36.68
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	58	43	$71.00	$40.37
99221 Initial hospital inpatient care per day, typically 30 minutes	48	48	$172.00	$93.95
15275 Application of skin substitute graft to wound of face, scalp, eyelids, mouth, neck, ears, around eyes, genitals, hands, feet, fingers, or toes, 25.0 sq cm or less of wound 100.0 sq cm or less	39	11	$546.00	$89.45
11043 Removal of muscle and/or tissue, 20.0 sq cm or less	37	27	$682.00	$144.77
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	35	35	$148.00	$97.89
99202 New patient office or other outpatient visit, typically 20 minutes	30	30	$114.00	$47.77
11044 Removal of bone, 20.0 sq cm or less	17	11	$837.00	$210.71
99202 New patient office or other outpatient visit, typically 20 minutes	15	15	$114.00	$68.00
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	15	15	$232.00	$129.62
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$211.00	$153.17
10060 Simple or single drainage of skin abscess	13	11	$194.00	$87.50

Medical Specialties & State Licenses

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License TN 24584

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Specialist

NUCC Taxonomy Code: 174400000X

State License TN MD24584

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

3076991 (TN)

Commercial Insurance / Payer ID Blue Cross Blue Shield

4088202 (TN)

Hospital & Practice Group Affiliations

Memorial Health Partners Foundation, Inc

2525 Desales Ave, Chattanooga, TN 374041161

Phone: 4236988692

Memorial Health Partners Foundation, Inc

5600 Brainerd Rd, Chattanooga, TN 374115371

Phone: 4234143586

Memorial Health Partners Foundation, Inc

2525 Desales Ave, Chattanooga, TN 374041161

Phone: 4234924734

Practice Associates & Co-Workers

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

10 Associated Practitioners

Dr. Donald Mackler , MD

Internal Medicine - Gastroenterology

NPI 1013983188

Doctor of Medicine (M.D.)

Dr. Hytham Kadrie , MD

Psychiatry & Neurology - Neurology

NPI 1063449486

Doctor of Medicine (M.D.)

Dr. Charles Portera , MD

Obstetrics & Gynecology - Gynecologic Oncology

NPI 1154311843

Doctor of Medicine (M.D.)

Stacy Park , FNP

Nurse Practitioner - Family

NPI 1205012234

Family Nurse Practitioner

Dr. Charles Hughes , MD

Psychiatry & Neurology - Neurology

NPI 1528368297

Doctor of Medicine (M.D.)

Dr. Robert Barnett , MD

Surgery

NPI 1568456069

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active March 05, 2010

NPI status registered as active in NPPES database

📍

Updated Practice Location March 05, 2010

Registered at 721 GLENWOOD DR, SUITE 553, CHATTANOOGA, TN 374041106 (Tel: 4234952640)

📍

Updated Business Mailing Address March 05, 2010

Registered at 721 GLENWOOD DR, SUITE 553, CHATTANOOGA, TN 374041106 (Tel: 4234952640)

👤

Provider Name / Credentials Updated March 05, 2010

Recorded as JOHN GWIN, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 05, 2010

Specialist (License #MD24584 in TN)

🟢

Initial NPI Registration & Enumeration September 07, 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: 1861486839

Entity Type:

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

Enumeration Date: September 07, 2005

Last Update: March 05, 2010

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

721 Glenwood Dr, Suite 553

Chattanooga, TN 374041106

Phone: 4234952640

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.