Active NPI 1992896567 Individual Practitioner Male Practitioner

Dr. Mark Adrain Kiefer , MD

Colon & Rectal Surgery • Tulsa, OK

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Mark Kiefer, MD is a certified Colon & Rectal Surgery practicing in Tulsa, OK. With approximately 23 years of clinical experience since graduating from University Of Tennessee, Hsc, College Of Medicine in 2003, Dr. Kiefer delivers high-quality medical care to the local community at 1705 E 19TH ST STE 502.

Dr. Kiefer is affiliated with St. John Physicians, Inc. and accepts Medicare assignment.

Frequently performed procedures and clinical services include biopsy of large bowel using an endoscope, 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, diagnostic examination of the anus using an endoscope. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1705 E 19th St Ste 502

Tulsa, OK 741045416

Telephone 9187487800

Fax 9184036349

Medicare Profile & Education

Medical School

University Of Tennessee, Hsc, College Of Medicine

Graduation Year

2003

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Colon & Rectal Surgery in Tulsa, OK

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

23 Yrs -0.4 yrs vs City Avg

City Avg: 23.4 Yrs

State Avg: 19.3 Yrs

Regional Practice Density

11 Specialists

Practicing in Tulsa, OK (21 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

72.1% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Kiefer (23 Years) 23 Yrs

Tulsa Specialty Average (23.4 Years) 23.4 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
45380 Biopsy of large bowel using an endoscope	75	75	$985.00	$83.46
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	73	73	$118.00	$5.44
46600 Diagnostic examination of the anus using an endoscope	60	53	$195.18	$109.08
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	55	30	$150.00	$76.67
99213 Established patient office or other outpatient visit, typically 15 minutes	52	35	$151.00	$87.05
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	50	50	$1112.00	$235.56
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	24	24	$223.00	$107.14
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	21	21	$342.00	$155.79
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	20	20	$422.00	$167.99
44205 Partial removal of small and large bowel with attachment of small and large bowel using an endoscope	20	20	$2812.00	$844.19
44207 Partial removal of large bowel and reattachment to rectum using an endoscope	16	16	$3841.00	$914.78
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	13	13	$425.00	$213.22
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	12	12	$222.00	$123.59
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	12	12	$827.00	$177.41

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
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	88	87	$118.00	$5.15
45380 Biopsy of large bowel using an endoscope	77	77	$985.00	$69.43
46600 Diagnostic examination of the anus using an endoscope	57	49	$185.00	$110.15
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	56	56	$1112.00	$239.45
99213 Established patient office or other outpatient visit, typically 15 minutes	41	32	$151.00	$84.03
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	38	17	$150.00	$76.22
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	37	37	$342.00	$158.00
99231 Follow-up hospital inpatient care per day, typically 15 minutes	30	13	$82.00	$47.81
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	27	27	$223.00	$105.86
44207 Partial removal of large bowel and reattachment to rectum using an endoscope	23	23	$3841.00	$968.20
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	19	17	$287.00	$125.25
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	19	19	$222.00	$121.04
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	15	15	$425.00	$208.83
44205 Partial removal of small and large bowel with attachment of small and large bowel using an endoscope	15	15	$2812.00	$683.41
G0105 Colorectal cancer screening; colonoscopy on individual at high risk	12	12	$827.00	$174.58

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
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	69	68	$118.00	$5.15
45380 Biopsy of large bowel using an endoscope	66	64	$985.00	$61.05
46600 Diagnostic examination of the anus using an endoscope	63	55	$185.00	$113.89
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	57	56	$1112.00	$240.14
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	53	19	$150.00	$68.33
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	39	39	$342.00	$159.61
99231 Follow-up hospital inpatient care per day, typically 15 minutes	38	14	$82.00	$35.27
99213 Established patient office or other outpatient visit, typically 15 minutes	37	28	$151.00	$86.37
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	29	28	$287.00	$129.60
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	25	25	$425.00	$211.70
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	23	23	$223.00	$106.65
44205 Partial removal of small and large bowel with attachment of small and large bowel using an endoscope	18	18	$2812.00	$713.35
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	14	13	$222.00	$122.17

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
45380 Biopsy of large bowel using an endoscope	79	77	$985.00	$59.96
46600 Diagnostic examination of the anus using an endoscope	75	59	$185.00	$112.97
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	68	24	$150.00	$69.55
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	66	64	$1112.00	$242.73
99213 Established patient office or other outpatient visit, typically 15 minutes	47	31	$151.00	$87.49
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	45	45	$342.00	$161.43
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	35	28	$222.00	$124.35
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	26	23	$287.00	$131.52
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	22	22	$118.00	$5.31
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	15	15	$425.00	$213.60
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	12	12	$223.00	$107.48

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	96	38	$150.00	$70.94
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	80	79	$118.00	$5.36
45380 Biopsy of large bowel using an endoscope	75	74	$985.00	$67.19
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	62	61	$1112.00	$255.75
46600 Diagnostic examination of the anus using an endoscope	61	48	$185.00	$97.00
99213 Established patient office or other outpatient visit, typically 15 minutes	51	34	$151.00	$71.92
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	48	48	$223.00	$101.29
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	35	33	$287.00	$133.25
44207 Partial removal of large bowel and reattachment to rectum using an endoscope	24	24	$3841.00	$774.82
99231 Follow-up hospital inpatient care per day, typically 15 minutes	23	12	$82.00	$38.72
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	19	16	$222.00	$88.20
45378 Diagnostic exam of large bowel using a flexible endoscope	17	16	$827.00	$130.07
44205 Partial removal of small and large bowel with attachment of small and large bowel using an endoscope	15	15	$2812.00	$668.22
44625 Closure of large or small bowel opening with bowel removal and reattachment	14	14	$2143.00	$581.04
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	12	12	$342.00	$138.32

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	116	42	$150.00	$69.93
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	109	109	$118.00	$5.46
45380 Biopsy of large bowel using an endoscope	91	91	$985.00	$83.87
99231 Follow-up hospital inpatient care per day, typically 15 minutes	86	22	$82.00	$38.12
46600 Diagnostic examination of the anus using an endoscope	60	53	$185.00	$88.48
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	59	59	$1112.00	$248.62
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	55	55	$223.00	$100.83
99213 Established patient office or other outpatient visit, typically 15 minutes	50	40	$151.00	$70.78
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	37	35	$287.00	$134.01
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	17	16	$222.00	$97.80
44207 Partial removal of large bowel and reattachment to rectum using an endoscope	15	15	$3841.00	$1195.93
45381 Injection beneath lining of large bowel using a flexible endoscope	11	11	$990.00	$37.42

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
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	118	118	$118.00	$5.49
45380 Biopsy of large bowel using an endoscope	102	102	$985.00	$57.83
46600 Diagnostic examination of the anus using an endoscope	90	83	$185.00	$81.62
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	84	84	$1112.00	$253.71
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	80	80	$223.00	$99.74
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	68	31	$150.00	$70.61
99213 Established patient office or other outpatient visit, typically 15 minutes	44	34	$151.00	$68.97
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	24	24	$287.00	$132.69
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	22	21	$222.00	$102.03
44205 Partial removal of small and large bowel with attachment of small and large bowel using an endoscope	13	13	$2812.00	$550.87
45378 Diagnostic exam of large bowel using a flexible endoscope	12	12	$827.00	$177.63

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99231 Follow-up hospital inpatient care per day, typically 15 minutes	95	31	$82.00	$37.78
45380 Biopsy of large bowel using an endoscope	83	82	$985.00	$60.92
46600 Diagnostic examination of the anus using an endoscope	74	67	$185.00	$78.74
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	65	64	$1112.00	$246.79
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	63	63	$223.00	$97.51
99213 Established patient office or other outpatient visit, typically 15 minutes	53	42	$151.00	$66.65
99152 Moderate sedation services by physician also performing a procedure, patient 5 years of age or older, first 15 minutes	46	44	$106.00	$11.84
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	40	40	$118.00	$5.41
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	30	28	$287.00	$127.17
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	22	11	$150.00	$69.39
44207 Partial removal of large bowel and reattachment to rectum using an endoscope	15	15	$3841.00	$784.06
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$342.00	$154.81
45378 Diagnostic exam of large bowel using a flexible endoscope	11	11	$827.00	$183.60

Medical Specialties & State Licenses

CMS Verified: 2020-10-02

Colon & Rectal Surgery Primary Specialty

NUCC Taxonomy Code: 208C00000X

State License OK 27205

A colon and rectal surgeon is trained to diagnose and treat various diseases of the intestinal tract, colon, rectum, anal canal and perianal area by medical and surgical means. This specialist also deals with other organs and tissues (such as the liver, urinary and female reproductive system) involved with primary intestinal disease.

Surgery

NUCC Taxonomy Code: 208600000X

State License OK 27205

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.

Hospital & Practice Group Affiliations

St. John Physicians, Inc.

1705 E 19th St, Tulsa, OK 741045410

St. John Physicians, Inc.

1923 S Utica Ave, Tulsa, OK 741046520

Phone: 9187442071

Practice Associates & Co-Workers

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

5 Associated Practitioners

Dr. Matthew Coburn , MD

Surgery

NPI 1255560488

Doctor of Medicine (M.D.)

Angel Allen , APRN

Nurse Practitioner - Family

NPI 1528539475

Advanced Practice Registered Nurse

Dr. Mitchell Mccain , MD

Colon & Rectal Surgery

NPI 1578183703

Doctor of Medicine (M.D.)

Dr. Maria Cristina Trinidad , DNP, AGACNP-BC

Nurse Practitioner - Acute Care

NPI 1619615523

Doctor of Nursing Practice, Adult-Gerontology Acute Care Nurse Practitioner (Board Certified)

Dr. Rodney Clingan , MD

Colon & Rectal Surgery

NPI 1669433421

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 October 02, 2020

Registered at 1705 E 19TH ST STE 502, TULSA, OK 741045416 (Tel: 9187487800)

📍

Updated Business Mailing Address October 02, 2020

Registered at 1705 E 19TH ST STE 502, TULSA, OK 741045416 (Tel: 9187487800)

✅

NPI Profile Active July 01, 2009

NPI status registered as active in NPPES database

📍

Updated Practice Location July 01, 2009

Registered at 1705 E 19TH ST, SUITE 705, TULSA, OK 741045405 (Tel: 9187487800)

📍

Updated Business Mailing Address July 01, 2009

Registered at 1515 N HARVARD AVE, STE E, TULSA, OK 741154957 (Tel: 9188326049)

👤

Provider Name / Credentials Updated July 01, 2009

Recorded as MARK KIEFER, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 01, 2009

Surgery (License #27205 in OK)

🟢

Initial NPI Registration & Enumeration September 27, 2006

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: 1992896567

Entity Type:

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

Enumeration Date: September 27, 2006

Last Update: October 02, 2020

Sole Proprietor: No

Update or Correct Profile

Mailing Address

1705 E 19th St Ste 502

Tulsa, OK 741045416

Phone: 9187487800

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.