Active NPI 1912185661 Individual Practitioner Male Practitioner

Dr. Douglas Aaron Rex , DO

Surgery • Marion, IN

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Douglas Rex, DO is a certified Surgery practicing in Marion, IN. With approximately 23 years of clinical experience since graduating from University Of Pikeville, Kentucky College Of Osteopathic Med in 2003, Dr. Rex delivers high-quality medical care to the local community at 330 N WABASH AVE.

Dr. Rex is affiliated with Marion General Hospital and accepts Medicare assignment.

Frequently performed procedures and clinical services include removal of polyps or growths of large bowel using an endoscope with mechanical snare, established patient outpatient office visit, new patient outpatient office visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

330 N Wabash Ave
Ste G370

Marion, IN 469522678

Telephone 7656607500

Fax 7656623411

Associated Practice Facility / Clinic

🏢 Professional Arts Pharmacy Facility NPI 1508853045

Medicare Profile & Education

Medical School

University Of Pikeville, Kentucky College Of Osteopathic Med

Graduation Year

2003

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Marion, IN

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

23 Yrs +7.7 yrs vs City Avg

City Avg: 15.3 Yrs

State Avg: 25.9 Yrs

Regional Practice Density

10 Specialists

Practicing in Marion, IN (657 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

59.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Rex (23 Years) 23 Yrs

Marion Specialty Average (15.3 Years) 15.3 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
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	61	60	$775.00	$231.15
99213 Established patient office or other outpatient visit, typically 15 minutes	56	43	$123.83	$83.14
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	52	52	$210.35	$155.52
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	46	42	$172.26	$119.59
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	34	28	$71.84	$52.55
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	30	30	$145.97	$103.70
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	28	28	$558.00	$74.47
45380 Biopsy of large bowel using an endoscope	27	27	$686.00	$45.86
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	21	19	$227.00	$161.34
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	12	12	$256.93	$204.54
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	11	11	$219.54	$168.38

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	57	48	$120.00	$84.05
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	54	54	$770.98	$231.91
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	42	40	$162.00	$118.95
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	37	37	$190.00	$154.54
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	32	31	$558.00	$86.87
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	29	27	$64.00	$52.30
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	22	22	$127.00	$103.93
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	21	21	$227.00	$162.56
45380 Biopsy of large bowel using an endoscope	21	21	$686.00	$38.91
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	16	16	$252.00	$204.06
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	13	13	$572.00	$167.81
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	11	11	$206.00	$166.93

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	48	44	$162.00	$120.61
99213 Established patient office or other outpatient visit, typically 15 minutes	47	39	$120.00	$85.15
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	44	43	$775.00	$237.24
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	41	41	$187.20	$154.02
45380 Biopsy of large bowel using an endoscope	33	33	$686.00	$82.70
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	29	24	$62.28	$52.51
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	26	23	$227.00	$185.40
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	25	25	$123.16	$104.89
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	20	19	$558.00	$85.16
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	15	13	$2140.00	$299.07

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	58	58	$185.00	$159.39
99213 Established patient office or other outpatient visit, typically 15 minutes	45	38	$107.02	$85.99
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	45	40	$144.73	$120.93
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	42	34	$56.69	$52.41
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	39	39	$121.00	$104.53
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	36	36	$775.00	$234.93
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	29	29	$558.00	$80.23
45380 Biopsy of large bowel using an endoscope	24	24	$686.00	$110.30
45378 Diagnostic exam of large bowel using a flexible endoscope	19	19	$572.00	$175.69
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	13	13	$572.00	$175.99
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	13	13	$572.00	$176.15
11402 Removal of noncancer skin growth of body, arms, or legs, 1.1-2.0 cm	13	13	$235.00	$131.53
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	12	12	$1898.33	$309.45
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	11	11	$155.00	$129.13
99202 New patient office or other outpatient visit, typically 20 minutes	11	11	$84.00	$68.81
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	11	11	$335.18	$17.78

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	41	32	$49.00	$42.59
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	41	41	$185.00	$157.32
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	40	36	$120.00	$100.88
99213 Established patient office or other outpatient visit, typically 15 minutes	38	34	$81.00	$71.43
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	34	34	$121.00	$102.40
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	29	28	$775.00	$248.61
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	23	23	$558.00	$88.62
99202 New patient office or other outpatient visit, typically 20 minutes	17	17	$84.00	$72.32
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	17	16	$155.00	$133.78
45378 Diagnostic exam of large bowel using a flexible endoscope	15	14	$572.00	$162.57
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	15	15	$572.00	$174.75
45380 Biopsy of large bowel using an endoscope	12	12	$686.00	$120.19

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	78	67	$120.00	$103.66
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	77	77	$121.00	$100.89
99213 Established patient office or other outpatient visit, typically 15 minutes	60	53	$81.00	$69.73
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	49	48	$775.00	$236.99
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	34	29	$49.00	$42.63
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	33	33	$558.00	$98.92
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	29	19	$82.00	$69.92
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	28	28	$185.00	$156.18
45380 Biopsy of large bowel using an endoscope	26	26	$686.00	$112.56
45378 Diagnostic exam of large bowel using a flexible endoscope	23	23	$572.00	$169.75
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	16	14	$117.00	$100.04
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	16	15	$1850.00	$284.70
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	15	15	$138.00	$16.86
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	12	12	$155.00	$131.22
99202 New patient office or other outpatient visit, typically 20 minutes	12	12	$84.00	$72.29
38525 Biopsy or removal of lymph nodes of under the arm, open procedure	12	11	$621.00	$288.38
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	12	12	$221.00	$191.07

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	63	$120.00	$101.38
99213 Established patient office or other outpatient visit, typically 15 minutes	59	49	$81.00	$68.02
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	59	59	$185.00	$152.18
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	54	54	$121.00	$100.63
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	46	46	$775.00	$239.30
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	42	42	$558.00	$92.78
45380 Biopsy of large bowel using an endoscope	39	39	$686.00	$93.30
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	37	30	$49.00	$41.03
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	28	17	$82.00	$69.19
G0500 Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	24	24	$83.21	$5.15
99202 New patient office or other outpatient visit, typically 20 minutes	24	24	$84.00	$70.20
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	22	21	$1850.00	$311.20
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	20	19	$135.80	$17.77
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	19	17	$162.00	$136.66
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	18	18	$227.00	$192.39
45378 Diagnostic exam of large bowel using a flexible endoscope	18	17	$565.00	$172.52
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	15	15	$560.80	$176.73
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	14	14	$155.00	$129.45

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	90	90	$121.58	$98.77
99213 Established patient office or other outpatient visit, typically 15 minutes	89	67	$81.00	$67.74
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	79	66	$120.00	$97.45
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	48	47	$775.00	$240.62
45380 Biopsy of large bowel using an endoscope	44	43	$686.00	$104.21
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	40	40	$532.83	$92.54
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	36	24	$49.00	$39.92
G0500 Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	31	30	$75.42	$5.19
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	22	22	$147.55	$16.85
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	21	21	$2020.76	$306.31
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	21	21	$184.57	$154.09
99201 New patient office or other outpatient visit, typically 10 minutes	21	21	$49.00	$40.89
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	20	20	$561.90	$178.22
45378 Diagnostic exam of large bowel using a flexible endoscope	19	19	$591.58	$155.45
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	18	12	$117.00	$99.40
99152 Moderate sedation services by physician also performing a procedure, patient 5 years of age or older, first 15 minutes	17	17	$68.59	$11.79
99202 New patient office or other outpatient visit, typically 20 minutes	16	16	$83.25	$69.03

Medical Specialties & State Licenses

CMS Verified: 2020-10-20

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License IN 02003334B

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.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

200916470 (IN)

Commercial Insurance / Payer ID Anthem

000000611209 (IN)

Hospital & Practice Group Affiliations

Marion General Hospital

330 N Wabash Ave, Marion, IN 469522678

Phone: 7656607500

Practice Associates & Co-Workers

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

4 Associated Practitioners

Dr. Tamy Perng , DO

Surgery

NPI 1063628956

Doctor of Osteopathic Medicine (D.O.)

Dr. Jeffrey Miller , DO

Surgery

NPI 1285682625

Doctor of Osteopathic Medicine (D.O.)

Dr. Nitin Sharma , MD

Surgery

NPI 1548460553

Doctor of Medicine (M.D.)

Stephen Derryberry

Surgery

NPI 1588161814

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active May 20, 2016

NPI status registered as active in NPPES database

📍

Updated Practice Location May 20, 2016

Registered at 330 N WABASH AVE, STE G370, MARION, IN 469522678 (Tel: 7656607500)

📍

Updated Business Mailing Address May 20, 2016

Registered at 330 N WABASH, STE 320, MARION, IN 469522600 (Tel: 7656607600)

👤

Provider Name / Credentials Updated May 20, 2016

Recorded as DOUGLAS REX, D.O.,

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) May 20, 2016

Surgery (License #02003334B in IN)

🟢

Initial NPI Registration & Enumeration February 05, 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: 1912185661

Entity Type:

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

Enumeration Date: February 05, 2008

Last Update: October 20, 2020

Sole Proprietor: No

Update or Correct Profile

Mailing Address

330 N Wabash, Ste 320

Marion, IN 469522600

Phone: 7656607600

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.