Active NPI 1932176252 Individual Practitioner Male Practitioner

Dr. Mark C Littlejohn , MD

Otolaryngology • Frisco, TX

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Mark Littlejohn, MD is a certified Otolaryngology practicing in Frisco, TX. With approximately 38 years of clinical experience since graduating from University Of Texas Medical Branch At Galveston in 1988, Dr. Littlejohn delivers high-quality medical care to the local community at 8380 WARREN PKWY STE 504.

Dr. Littlejohn is affiliated with Christus Trinity Clinic and accepts Medicare assignment.

Frequently performed procedures and clinical services include new patient outpatient office visit, diagnostic exam of voice box using a flexible endoscope, established 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

8380 Warren Pkwy Ste 504

Frisco, TX 75034

Telephone 9725964005

Fax 9729851253

Associated Practice Facility / Clinic

🏢 Collin County Ent Facility NPI 1740916139

Medicare Profile & Education

Medical School

University Of Texas Medical Branch At Galveston

Graduation Year

1988

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Otolaryngology in Frisco, TX

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

38 Yrs +13.9 yrs vs City Avg

City Avg: 24.1 Yrs

State Avg: 26.1 Yrs

Regional Practice Density

15 Specialists

Practicing in Frisco, TX (840 Statewide)

Telehealth Adoption Rate

20.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

81.0% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Littlejohn (38 Years) 38 Yrs

Frisco Specialty Average (24.1 Years) 24.1 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
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	208	208	$375.00	$130.36
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	190	190	$251.00	$80.43
31575 Diagnostic exam of voice box using a flexible endoscope	105	97	$443.00	$66.57
99213 Established patient office or other outpatient visit, typically 15 minutes	89	83	$204.00	$64.44
69210 Removal of impacted ear wax	70	67	$161.00	$30.54
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	61	60	$289.00	$95.23
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	56	53	$127.00	$34.50
31231 Diagnostic examination of nasal passages using an endoscope	29	25	$679.00	$63.21
95992 Repositioning maneuvers for treatment of vertigo, per day	25	23	$99.00	$35.15
31237 Biopsy or removal of nasal polyp or tissue using an endoscope	18	13	$1671.17	$218.32
69433 Incision of eardrum with insertion of eardrum tube under local or topical anesthesia	12	11	$752.50	$141.97

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	198	198	$251.00	$78.39
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	195	195	$375.00	$126.91
99213 Established patient office or other outpatient visit, typically 15 minutes	172	137	$204.00	$63.37
31575 Diagnostic exam of voice box using a flexible endoscope	122	102	$443.00	$64.51
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	95	78	$127.00	$34.07
69210 Removal of impacted ear wax	78	70	$161.00	$29.67
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	64	53	$289.00	$93.56
31231 Diagnostic examination of nasal passages using an endoscope	38	25	$673.32	$62.02
95992 Repositioning maneuvers for treatment of vertigo, per day	32	27	$99.00	$34.35
69433 Incision of eardrum with insertion of eardrum tube under local or topical anesthesia	12	12	$752.50	$138.16
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	11	11	$406.00	$137.40

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	138	138	$367.83	$128.30
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	120	120	$247.88	$79.47
99213 Established patient office or other outpatient visit, typically 15 minutes	90	75	$200.66	$63.62
69210 Removal of impacted ear wax	51	46	$164.76	$29.28
31575 Diagnostic exam of voice box using a flexible endoscope	51	47	$432.02	$64.09
99213 Established patient office or other outpatient visit, typically 15 minutes	40	38	$120.00	$81.45
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	33	33	$300.00	$153.94
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	31	28	$126.06	$33.87
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	31	29	$200.00	$115.66
92557 Comprehensive hearing and speech recognition test	31	30	$75.00	$34.11
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	30	27	$283.70	$91.63
92550 Test for eardrum and muscle function	25	24	$40.00	$20.16
31231 Diagnostic examination of nasal passages using an endoscope	24	13	$653.25	$60.79
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	21	21	$150.00	$101.51
70486 CT scan of face	18	18	$280.00	$118.04
69210 Removal of impacted ear wax	12	12	$88.75	$41.94
99202 New patient office or other outpatient visit, typically 20 minutes	11	11	$164.36	$47.00

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	152	114	$117.24	$82.33
92557 Comprehensive hearing and speech recognition test	104	101	$75.00	$35.52
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	95	78	$190.32	$119.89
92550 Test for eardrum and muscle function	91	88	$40.00	$20.62
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	76	76	$150.00	$103.74
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	74	74	$285.81	$155.22
J0702 Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg	39	13	$8.69	$6.70
70486 CT scan of face	31	30	$267.10	$128.23
69210 Removal of impacted ear wax	24	22	$75.00	$41.98
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	22	18	$75.00	$52.03
92567 Eardrum testing using ear probe	18	17	$40.00	$15.37
31575 Diagnostic exam of voice box using a flexible endoscope	18	15	$325.00	$118.84
31231 Diagnostic examination of nasal passages using an endoscope	16	12	$500.00	$183.09
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	13	13	$40.00	$13.11

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	148	111	$90.00	$66.92
92557 Comprehensive hearing and speech recognition test	94	89	$75.00	$35.49
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	90	64	$140.94	$98.09
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	86	86	$150.00	$98.47
92550 Test for eardrum and muscle function	71	70	$40.00	$20.63
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	41	41	$225.00	$147.32
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	31	20	$75.00	$41.35
31575 Diagnostic exam of voice box using a flexible endoscope	27	24	$325.00	$108.09
92567 Eardrum testing using ear probe	25	24	$40.00	$14.81
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	14	14	$300.00	$181.21
31231 Diagnostic examination of nasal passages using an endoscope	13	12	$500.00	$178.12
70486 CT scan of face	12	11	$200.00	$127.96

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	121	97	$90.00	$67.74
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	107	107	$150.00	$98.16
92557 Comprehensive hearing and speech recognition test	99	92	$75.00	$34.94
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	77	64	$140.00	$98.99
92550 Test for eardrum and muscle function	69	66	$40.00	$19.96
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	48	48	$225.00	$148.32
92567 Eardrum testing using ear probe	35	31	$40.00	$13.98
70486 CT scan of face	25	25	$200.00	$125.60
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	21	20	$75.00	$41.10
31231 Diagnostic examination of nasal passages using an endoscope	20	16	$500.00	$182.00
31575 Diagnostic exam of voice box using a flexible endoscope	15	15	$325.00	$106.05

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	109	109	$150.00	$96.73
99213 Established patient office or other outpatient visit, typically 15 minutes	103	78	$90.58	$65.46
92557 Comprehensive hearing and speech recognition test	102	95	$75.00	$34.20
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	69	58	$143.70	$96.77
92550 Test for eardrum and muscle function	68	65	$40.00	$19.50
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	45	45	$225.00	$145.32
92567 Eardrum testing using ear probe	38	34	$40.00	$13.07
70486 CT scan of face	29	28	$200.00	$119.99
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	15	11	$75.00	$39.19
99202 New patient office or other outpatient visit, typically 20 minutes	11	11	$110.00	$67.30

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	120	120	$150.00	$96.91
99213 Established patient office or other outpatient visit, typically 15 minutes	89	63	$90.00	$65.78
92557 Comprehensive hearing and speech recognition test	81	73	$75.00	$34.02
92550 Test for eardrum and muscle function	55	52	$40.00	$18.90
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	45	41	$140.00	$96.01
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	44	44	$225.34	$146.35
J0702 Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg	36	11	$6.67	$5.06
92567 Eardrum testing using ear probe	28	24	$40.00	$13.23
31575 Diagnostic exam of voice box using a flexible endoscope	22	17	$325.00	$102.46
31231 Diagnostic examination of nasal passages using an endoscope	21	16	$500.00	$180.13
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	19	19	$75.00	$36.82
70486 CT scan of face	13	12	$400.00	$124.43

Medical Specialties & State Licenses

Otolaryngology Primary Specialty

NUCC Taxonomy Code: 207Y00000X

State License TX H5784

An otolaryngologist-head and neck surgeon provides comprehensive medical and surgical care for patients with diseases and disorders that affect the ears, nose, throat, the respiratory and upper alimentary systems and related structures of the head and neck. An otolaryngologist diagnoses and provides medical and/or surgical therapy or prevention of diseases, allergies, neoplasms, deformities, disorders and/or injuries of the ears, nose, sinuses, throat, respiratory and upper alimentary systems, face, jaws and the other head and neck systems. Head and neck oncology, facial plastic and reconstructive surgery and the treatment of disorders of hearing and voice are fundamental areas of expertise.

Hospital & Practice Group Affiliations

Christus Trinity Clinic

700 E Marshall Ave, Longview, TX 756015580

Phone: 9033151488

Christus Trinity Clinic

620 S Fleishel Ave, Tyler, TX 757012041

Phone: 9036064900

Christus Trinity Clinic

Po Box, Dallas, TX 752846098

Christus Trinity Clinic

630 S Fleishel Ave, Tyler, TX 757012041

Phone: 9036065560

Practice Associates & Co-Workers

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

11 Associated Practitioners

Dr. Tony Peter , MD

Otolaryngology

NPI 1023549870

Doctor of Medicine (M.D.)

Dr. Kenny Carter , MD

Otolaryngology

NPI 1043307804

Doctor of Medicine (M.D.)

Dr. Ewen Tseng , MD

Otolaryngology

NPI 1053380469

Doctor of Medicine (M.D.)

Chad Bailey , MPAS, PA-C

Physician Assistant - Medical

NPI 1093847717

MPAS, Physician Assistant (Certified)

Dr. Keith Matheny , MD

Otolaryngology

NPI 1205805462

Doctor of Medicine (M.D.)

Dr. Patricia Reed , AuD

Audiologist

NPI 1548417173

Doctor of Audiology

Career & Practice History Timeline

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

8 Historical Events

📍

Updated Practice Location November 28, 2018

Registered at 8380 WARREN PKWY STE 504, FRISCO, TX 75034 (Tel: 9725964005)

📍

Updated Business Mailing Address November 28, 2018

Registered at 8380 WARREN PKWY STE 504, FRISCO, TX 750344253 (Tel: 9725964005)

✅

NPI Profile Active September 10, 2012

NPI status registered as active in NPPES database

📍

Updated Practice Location September 10, 2012

Registered at 709 HOLLYBROOK DR, SUITE 5601, LONGVIEW, TX 756052411 (Tel: 9032367560)

📍

Updated Business Mailing Address September 10, 2012

Registered at PO BOX 847176, DALLAS, TX 752847176 (Tel: 9032371800)

👤

Provider Name / Credentials Updated September 10, 2012

Recorded as MARK LITTLEJOHN, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) September 10, 2012

Otolaryngology (License #H5784 in TX)

🟢

Initial NPI Registration & Enumeration March 06, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

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NPI Administrative Meta

NPI Number: 1932176252

Entity Type:

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

Enumeration Date: March 06, 2006

Last Update: November 28, 2018

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

8380 Warren Pkwy Ste 504

Frisco, TX 750344253

Phone: 9725964005

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.