Active NPI 1447275052 Individual Practitioner Male Practitioner

Dr. Loyal Richard Stierlen , DO

Surgery • Oklahoma City, OK

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Loyal Stierlen, DO is a certified Surgery practicing in Oklahoma City, OK. With approximately 25 years of clinical experience since completing medical education in 2001, Dr. Stierlen delivers high-quality medical care to the local community at 4221 S WESTERN AVE STE 5050.

Dr. Stierlen is affiliated with Integris Ambulatory Care Corporation and accepts Medicare assignment.

Frequently performed procedures and clinical services include initial hospital care with straightforward or low-level medical decision making, if using time, at least, removal of skin and tissue, 20.0 sq cm or less, 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

4221 S Western Ave Ste 5050

Oklahoma City, OK 73109

Telephone 4056367900

Fax 4056445168

Associated Practice Facility / Clinic

🏢 Integris Ambulatory Care C Orporation Facility NPI 1326076027

Medicare Profile & Education

Medical School

Other

Graduation Year

2001

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Oklahoma City, OK

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

25 Yrs +5.1 yrs vs City Avg

City Avg: 19.9 Yrs

State Avg: 28.1 Yrs

Regional Practice Density

141 Specialists

Practicing in Oklahoma City, OK (386 Statewide)

Telehealth Adoption Rate

5.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

55.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Stierlen (25 Years) 25 Yrs

Oklahoma City Specialty Average (19.9 Years) 19.9 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
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	65	63	$230.00	$121.87
11042 Removal of skin and tissue, 20.0 sq cm or less	43	15	$124.07	$53.89
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	30	30	$319.00	$151.55
99231 Follow-up hospital inpatient care per day, typically 15 minutes	19	16	$88.00	$46.12
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	18	18	$214.00	$102.79
99213 Established patient office or other outpatient visit, typically 15 minutes	15	13	$173.00	$83.78
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	12	12	$38.33	$16.68
47562 Removal of gallbladder using an endoscope	12	12	$1413.83	$610.50
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	12	12	$717.42	$277.47

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	144	25	$120.40	$54.10
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	82	81	$257.66	$123.16
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	47	47	$319.00	$153.65
99231 Follow-up hospital inpatient care per day, typically 15 minutes	30	24	$81.87	$47.81
99213 Established patient office or other outpatient visit, typically 15 minutes	28	16	$129.14	$59.39
19301 Partial removal of breast	15	15	$1287.27	$627.38
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	15	13	$143.33	$76.21
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	14	14	$35.86	$17.30
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	14	14	$685.14	$292.35
99221 Initial hospital inpatient care per day, typically 30 minutes	14	14	$189.57	$79.80
38525 Biopsy or removal of lymph nodes of under the arm, open procedure	12	12	$857.50	$226.45
47563 Removal of gallbladder with x-ray study of bile ducts using an endoscope	11	11	$1406.09	$684.19

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	112	26	$120.00	$57.40
99213 Established patient office or other outpatient visit, typically 15 minutes	68	15	$112.22	$64.75
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	36	36	$249.58	$129.79
99231 Follow-up hospital inpatient care per day, typically 15 minutes	30	26	$77.07	$36.30
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	26	26	$314.69	$159.98
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	18	18	$696.00	$312.74
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	17	17	$37.00	$18.03
99213 Established patient office or other outpatient visit, typically 15 minutes	12	12	$168.33	$86.41
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$207.55	$106.83

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	171	25	$120.00	$58.61
99213 Established patient office or other outpatient visit, typically 15 minutes	74	22	$99.00	$65.85
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	59	59	$225.00	$130.06
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	57	57	$312.00	$161.55
99231 Follow-up hospital inpatient care per day, typically 15 minutes	32	27	$76.00	$37.28
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	25	25	$696.00	$320.50
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	24	24	$37.00	$17.52
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	21	20	$227.00	$124.55
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	18	16	$120.00	$69.60
47563 Removal of gallbladder with x-ray study of bile ducts using an endoscope	14	14	$1393.00	$700.75
49650 Repair of groin hernia using an endoscope	14	14	$903.02	$422.77
27880 Amputation of both lower leg bones	11	11	$1807.00	$819.73

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	218	45	$120.00	$60.02
99213 Established patient office or other outpatient visit, typically 15 minutes	111	31	$99.00	$50.54
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	80	78	$225.00	$133.46
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	65	65	$312.00	$154.25
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	46	26	$49.00	$25.50
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	23	23	$120.00	$71.20
49650 Repair of groin hernia using an endoscope	22	22	$904.36	$447.35
99231 Follow-up hospital inpatient care per day, typically 15 minutes	21	16	$76.00	$38.86
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	18	18	$37.00	$17.89
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	18	18	$696.00	$314.68
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	17	16	$202.00	$104.88
99213 Established patient office or other outpatient visit, typically 15 minutes	17	14	$137.00	$72.04
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	16	16	$152.00	$77.90
47563 Removal of gallbladder with x-ray study of bile ducts using an endoscope	12	12	$1393.00	$629.73
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$203.00	$103.87
27880 Amputation of both lower leg bones	11	11	$1807.00	$850.29

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	342	62	$120.00	$60.59
99213 Established patient office or other outpatient visit, typically 15 minutes	208	45	$99.00	$50.15
11045 Removal of skin and tissue, each additional 20.0 sq cm or less	99	16	$77.27	$26.52
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	79	79	$312.00	$156.69
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	66	66	$225.00	$134.51
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	36	16	$49.00	$25.07
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	24	17	$120.00	$71.42
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	19	18	$202.00	$104.26
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	18	18	$203.00	$103.72
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	16	16	$696.00	$316.14
99231 Follow-up hospital inpatient care per day, typically 15 minutes	16	13	$76.00	$38.71
99213 Established patient office or other outpatient visit, typically 15 minutes	14	14	$137.00	$71.00
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	14	14	$37.00	$18.56
27880 Amputation of both lower leg bones	13	13	$1807.00	$911.51
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	13	13	$148.00	$74.84
47563 Removal of gallbladder with x-ray study of bile ducts using an endoscope	13	13	$1393.00	$668.50

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
11042 Removal of skin and tissue, 20.0 sq cm or less	199	44	$120.00	$58.71
11045 Removal of skin and tissue, each additional 20.0 sq cm or less	61	13	$51.00	$24.39
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	61	59	$255.82	$130.95
99213 Established patient office or other outpatient visit, typically 15 minutes	53	22	$99.00	$49.66
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	48	24	$49.00	$24.68
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	46	46	$312.00	$151.92
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	34	34	$203.00	$95.36
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	22	21	$696.00	$318.42
99231 Follow-up hospital inpatient care per day, typically 15 minutes	22	15	$76.00	$36.72
47562 Removal of gallbladder using an endoscope	20	20	$1281.00	$646.84
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	20	19	$37.00	$18.26
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	18	18	$148.00	$74.37
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	15	12	$133.93	$70.61
99221 Initial hospital inpatient care per day, typically 30 minutes	13	13	$188.00	$98.42
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	12	12	$251.00	$125.39

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99231 Follow-up hospital inpatient care per day, typically 15 minutes	60	39	$76.00	$37.75
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	57	57	$265.00	$129.98
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	40	40	$312.00	$154.63
47562 Removal of gallbladder using an endoscope	24	24	$1281.00	$637.93
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	24	21	$139.00	$69.39
99213 Established patient office or other outpatient visit, typically 15 minutes	24	17	$137.00	$68.34
99221 Initial hospital inpatient care per day, typically 30 minutes	22	21	$196.00	$97.51
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	19	19	$203.00	$101.11
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device	15	15	$37.00	$18.42
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older	15	15	$696.00	$331.59
99202 New patient office or other outpatient visit, typically 20 minutes	13	13	$140.00	$69.65

Medical Specialties & State Licenses

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License OK 4438

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

Integris Ambulatory Care Corporation

4221 S Western Ave, Oklahoma City, OK 731093436

Integris Ambulatory Care Corporation

4401 S Western Ave, Oklahoma City, OK 731093413

Phone: 4056367000

Integris Ambulatory Care Corporation

600 S Monroe St, Enid, OK 737017211

Integris Ambulatory Care Corporation

4421 S Western Ave, Oklahoma City, OK 731093413

Phone: 4056445398

Integris Ambulatory Care Corporation

4833 Integris Pkwy, Edmond, OK 730348864

Integris Ambulatory Care Corporation

4801 Integris Pkwy, Edmond, OK 730348864

Phone: 4056573150

Integris Ambulatory Care Corporation

5501 N Portland, Oklahoma City, OK 731122074

Phone: 4059514016

Integris Ambulatory Care Corporation

3400 Nw Expressway, Oklahoma City, OK 731124492

Phone: 4059454589

Integris Ambulatory Care Corporation

4401 S Western, Oklahoma City, OK 731093413

Phone: 4056367000

Integris Ambulatory Care Corporation

1201 Health Ctr Pkwy, Yukon, OK 730996381

Phone: 4057176800

Practice Associates & Co-Workers

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

2 Associated Practitioners

Jessica Davis , PA-C

Physician Assistant

NPI 1053700849

Physician Assistant (Certified)

Dr. Shani Harvey , MD

Surgery

NPI 1417218611

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

13 Historical Events

📍

Updated Practice Location July 03, 2018

Registered at 4221 S WESTERN AVE STE 5050, OKLAHOMA CITY, OK 73109 (Tel: 4056367900)

✅

NPI Profile Active July 20, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location July 20, 2017

Registered at 4221 S WESTERN AVE STE 4005, OKLAHOMA CITY, OK 731093436 (Tel: 4056367900)

📍

Updated Business Mailing Address July 20, 2017

Registered at 5300 N INDEPENDENCE AVE, SUITE 280, OKLAHOMA CITY, OK 731125556 (Tel: (405) 713-9935)

👤

Provider Name / Credentials Updated July 20, 2017

Recorded as LOYAL STIERLEN, DO

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 20, 2017

Surgery (License #4438 in OK)

📍

Updated Practice Location June 30, 2017

Registered at 4221 S WESTERN AVE STE 4005, OKLAHOMA CITY, OK 731093436 (Tel: 4056367900)

✅

NPI Profile Active June 14, 2016

NPI status registered as active in NPPES database

📍

Updated Practice Location June 14, 2016

Registered at 3433 NW 56TH STREET, SUITE 900, OKLAHOMA CITY, OK 731124452 (Tel: 4057139935)

📍

Updated Business Mailing Address June 14, 2016

Registered at 5300 N INDEPENDENCE AVE, SUITE 280, OKLAHOMA CITY, OK 731125556 (Tel: 4057139935)

👤

Provider Name / Credentials Updated June 14, 2016

Recorded as LOYAL STIERLEN, DO

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 14, 2016

Surgery (License #4438 in OK)

🟢

Initial NPI Registration & Enumeration July 13, 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: 1447275052

Entity Type:

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

Enumeration Date: July 13, 2006

Last Update: July 03, 2018

Sole Proprietor: No

Update or Correct Profile

Mailing Address

5300 N Independence Ave, Suite 280

Oklahoma City, OK 731125556

Phone: 4056367900

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.