Active NPI 1780020586 Individual Practitioner Female Practitioner

Dr. Alexandra Herrero Leon Guerrero , MD

Surgery • Tamuning, GU

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Alexandra Leon Guerrero, MD is a certified Surgery practicing in Tamuning, GU. With approximately 13 years of clinical experience since graduating from New York University School Of Medicine in 2013, Dr. Leon Guerrero delivers high-quality medical care to the local community at 280 PALE SAN VITORES RD.

Dr. Leon Guerrero maintains professional affiliations with Hafa Specialist Group Llp, Guam Healthcare Development Incorporated and accepts Medicare assignment.

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

Practice Location & Contact Primary Location

Practice Address

280 Pale San Vitores Rd

Tamuning, GU 969133615

Telephone 6716474542

Fax 6716474558

Associated Practice Facility / Clinic

🏢 Hafa Specialist Group Llp Facility NPI 1235141060

Medicare Profile & Education

Medical School

New York University School Of Medicine

Graduation Year

2013

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Tamuning, GU

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

13 Yrs -21.1 yrs vs City Avg

City Avg: 34.1 Yrs

State Avg: 34.1 Yrs

Regional Practice Density

8 Specialists

Practicing in Tamuning, GU (12 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

30.3% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Leon Guerrero (13 Years) 13 Yrs

Tamuning Specialty Average (34.1 Years) 34.1 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
99213 Established patient office or other outpatient visit, typically 15 minutes	117	97	$80.60	$79.40
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	49	49	$159.33	$155.20
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	35	34	$355.07	$246.71
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	33	32	$267.92	$109.13
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	18	18	$241.27	$179.58

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	55	46	$69.07	$67.16
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	23	23	$141.06	$123.83
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	18	18	$197.67	$183.63
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	17	17	$136.29	$134.74
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	11	11	$117.54	$115.82
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	11	11	$257.33	$253.54

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	84	69	$69.44	$68.67
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	31	31	$144.02	$103.67
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	28	27	$104.02	$100.99
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	27	27	$85.64	$84.90
G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk	21	21	$241.00	$189.59
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	14	14	$263.25	$260.52

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	97	69	$72.73	$71.83
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	42	38	$115.66	$106.49
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	30	28	$205.07	$106.87
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	16	16	$92.61	$88.73
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$146.11	$140.31
45385 Removal of polyps or growths of large bowel using an endoscope with mechanical snare	11	11	$286.18	$265.20

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	41	29	$72.72	$72.61
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	27	27	$112.45	$108.88
43239 Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	20	19	$449.70	$110.83
G2012 Brief communication technology-based service, e.g. virtual check-in, by a physician or other qualified health care professional who can report evaluation and management services, provided to an established patient, not originating from a related e/m servic	16	14	$13.75	$13.75
45380 Biopsy of large bowel using an endoscope	12	12	$453.87	$213.67

Medical Specialties & State Licenses

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License GU M-2170

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.

Student in an Organized Health Care Education/Training Program

NUCC Taxonomy Code: 390200000X

An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.

Hospital & Practice Group Affiliations

Hafa Specialist Group Llp

280 Pale San Vitores Rd, Tamuning, GU 969133615

Phone: 6716474542

Guam Healthcare Development Incorporated

133 Route 3, Dededo, GU 969296911

Phone: 6716455500

Secondary Practice Locations

550 1st Ave

New York, NY 100166402

Phone: 2122635506

Practice Associates & Co-Workers

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

7 Associated Practitioners

Raja Saad

Specialist/Technologist, Other - Surgical Assistant

NPI 1124337399

Kevin Sullivan , CRNA

Nurse Anesthetist, Certified Registered

NPI 1245538669

Certified Registered Nurse Anesthetist

Dr. John Fegurgur , MD

Surgery - Plastic and Reconstructive Surgery

NPI 1487623856

Doctor of Medicine (M.D.)

Dr. Kia Rahmani , MD

Surgery

NPI 1740259613

Doctor of Medicine (M.D.)

Dr. Jitka Lom , MD

Family Medicine

NPI 1790754679

Doctor of Medicine (M.D.)

Maria Cecilia Mendiola , C-SA

Specialist/Technologist, Other - Surgical Technologist

NPI 1902149503

CSA

Career & Practice History Timeline

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

8 Historical Events

📍

Updated Practice Location August 27, 2019

Registered at 280 PALE SAN VITORES RD, TAMUNING, GU 969133615 (Tel: 6716474542)

📍

Updated Business Mailing Address August 27, 2019

Registered at 10 W ANACO LN, PITI, GU 969155412 (Tel: 6508046818)

✅

NPI Profile Active May 31, 2013

NPI status registered as active in NPPES database

📍

Updated Practice Location May 31, 2013

Registered at 550 1ST AVE, NEW YORK, NY 100166402 (Tel: 2122635506)

📍

Updated Business Mailing Address May 31, 2013

Registered at 428 E 14TH ST APT 5FE, NEW YORK, NY 100093470 (Tel: 6508046818)

👤

Provider Name / Credentials Updated May 31, 2013

Recorded as ALEXANDRA LEON GUERRERO, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) May 31, 2013

Student in an Organized Health Care Education/Training Program

🟢

Initial NPI Registration & Enumeration May 20, 2013

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: 1780020586

Entity Type:

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

Enumeration Date: May 20, 2013

Last Update: August 27, 2019

Sole Proprietor: No

Update or Correct Profile

Mailing Address

10 W Anaco Ln

Piti, GU 969155412

Phone: 6508046818

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.