Active NPI 1861454563 Individual Practitioner Male Practitioner

Dr. Guillermo D. Marquez , MD

Surgery • Mission, TX

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Guillermo Marquez, MD is a certified Surgery practicing in Mission, TX. With approximately 38 years of clinical experience since completing medical education in 1988, Dr. Marquez delivers high-quality medical care to the local community at 910 S BRYAN RD.

Dr. Marquez is affiliated with Rgv Surgical Associates, Pllc and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, new patient outpatient office visit, initial hospital care with straightforward or low-level medical decision making, if using time, at least. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

910 S Bryan Rd
Ste 202

Mission, TX 785726659

Telephone 9566826126

Fax 9565800464

Associated Practice Facility / Clinic

🏢 Raja N Salameh M D P A Facility NPI 1750452256

Medicare Profile & Education

Medical School

Other

Graduation Year

1988

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Mission, TX

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

38 Yrs +10.5 yrs vs City Avg

City Avg: 27.5 Yrs

State Avg: 25.2 Yrs

Regional Practice Density

3 Specialists

Practicing in Mission, TX (2342 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

19.2% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Marquez (38 Years) 38 Yrs

Mission Specialty Average (27.5 Years) 27.5 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
99213 Established patient office or other outpatient visit, typically 15 minutes	34	28	$110.00	$85.61
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	21	21	$130.00	$106.35
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	20	18	$149.00	$122.27

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	48	37	$110.00	$86.54
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	38	31	$150.00	$120.62
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	21	21	$223.00	$125.08
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	14	14	$130.00	$107.32

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	47	40	$110.00	$87.07
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	26	26	$130.00	$107.90
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	25	21	$150.00	$121.32
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	23	23	$223.00	$129.14

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	58	50	$106.38	$88.55
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	41	41	$129.51	$109.82
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	36	31	$146.67	$123.88
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	17	17	$223.00	$132.34
47563 Removal of gallbladder with x-ray study of bile ducts using an endoscope	11	11	$3360.00	$696.08

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	67	54	$76.06	$73.11
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	54	37	$110.00	$102.96
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	34	34	$128.00	$105.47
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	24	24	$223.00	$136.06

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	108	90	$76.00	$71.79
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	65	65	$128.00	$103.99
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	37	33	$110.00	$103.92
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	30	30	$223.00	$134.39
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	20	13	$119.00	$71.44

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	123	95	$76.00	$68.35
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	81	80	$223.00	$128.25
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	61	34	$119.00	$67.30
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	55	55	$128.00	$99.09
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	38	29	$110.00	$100.73
47563 Removal of gallbladder with x-ray study of bile ducts using an endoscope	25	25	$3360.00	$645.44
36821 Relocation of arm vein with connection to arm artery, open procedure	11	11	$1793.00	$635.36

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	156	117	$76.69	$69.69
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	76	76	$131.37	$100.58
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	69	68	$223.00	$132.65
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	55	51	$110.00	$100.21
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	54	34	$119.00	$70.03
47563 Removal of gallbladder with x-ray study of bile ducts using an endoscope	26	26	$3360.00	$673.24
36821 Relocation of arm vein with connection to arm artery, open procedure	11	11	$1793.00	$656.42

Medical Specialties & State Licenses

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License TX K1544

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

030586401 (TX)

Hospital & Practice Group Affiliations

Rgv Surgical Associates, Pllc

910 S Bryan Rd, Mission, TX 785726659

Phone: 9566826126

Practice Associates & Co-Workers

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

2 Associated Practitioners

Dr. Jesus Rodriguez-Aguero , MD

Surgery

NPI 1063474757

Doctor of Medicine (M.D.)

Dr. Jesus Villarreal , MD

Surgery

NPI 1568691814

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

11 Historical Events

✅

NPI Profile Active April 20, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location April 20, 2017

Registered at 910 S BRYAN RD, STE 202, MISSION, TX 785726659 (Tel: 9566826126)

📍

Updated Business Mailing Address April 20, 2017

Registered at 910 S BRYAN RD, STE 202, MISSION, TX 785726659 (Tel: 9566826126)

👤

Provider Name / Credentials Updated April 20, 2017

Recorded as GUILLERMO MARQUEZ, M.D.

🎓

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

Surgery (License #K1544 in TX)

✅

NPI Profile Active September 23, 2013

NPI status registered as active in NPPES database

📍

Updated Practice Location September 23, 2013

Registered at 620 S 12TH ST, MCALLEN, TX 785014928 (Tel: 9566826126)

📍

Updated Business Mailing Address September 23, 2013

Registered at 620 S 12TH ST, MCALLEN, TX 785014928 (Tel: 9566826126)

👤

Provider Name / Credentials Updated September 23, 2013

Recorded as GUILLERMO MARQUEZ, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) September 23, 2013

Surgery (License #K1544 in TX)

🟢

Initial NPI Registration & Enumeration April 06, 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: 1861454563

Entity Type:

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

Enumeration Date: April 06, 2006

Last Update: March 05, 2019

Sole Proprietor: No

Update or Correct Profile

Mailing Address

910 S Bryan Rd, Ste 202

Mission, TX 785726659

Phone: 9566826126

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.