Active NPI 1558629493 Individual Practitioner Male Practitioner

Dr. John Victor Gahagan , MD

Surgery • Pleasanton, CA

✓ Accepts Medicare Assignment Telehealth Available

Public Directory Information & Medical Disclaimer

This profile is compiled from official public domain records provided by CMS and the NPPES registry. TRUE-MEDINFO is an independent reference directory and does not provide medical advice, diagnosis, or treatment recommendations. Always consult a licensed medical professional for personal health decisions.

Professional Overview & Biography Verified Profile Summary

Dr. John Gahagan, MD is a registered Surgery practitioner in Pleasanton, CA. With approximately 14 years of clinical practice since completing medical education in 2012, Dr. Gahagan provides healthcare services at the registered practice location at 5725 W LAS POSITAS BLVD STE 100.

Dr. Gahagan is affiliated with Stanford Health Care and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include established patient outpatient office visit, subsequent hospital care with moderate levelof medical decision making, if using time, at least, 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

5725 W Las Positas Blvd Ste 100

Pleasanton, CA 945884007

Telephone 9257348130

Associated Practice Facility / Clinic

🏢 Valley Medical Oncology Consultants Facility NPI 1104861012

Medicare Profile & Education

Medical School

Other

Graduation Year

2012

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Pleasanton, CA

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

14 Yrs -14.8 yrs vs City Avg

City Avg: 28.8 Yrs

State Avg: 27.4 Yrs

Regional Practice Density

10 Specialists

Practicing in Pleasanton, CA (3346 Statewide)

Telehealth Adoption Rate

20.0% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

67.2% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Gahagan (14 Years) 14 Yrs

Pleasanton Specialty Average (28.8 Years) 28.8 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
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	75	53	$337.27	$136.85
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	54	28	$279.00	$87.66
46600 Diagnostic examination of the anus using an endoscope	51	48	$330.69	$109.30
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	44	44	$516.45	$176.73
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	40	40	$617.88	$238.82
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	28	28	$787.29	$192.61
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	27	18	$389.63	$131.29
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	23	19	$528.26	$202.62
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	12	12	$547.33	$144.82

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
46600 Diagnostic examination of the anus using an endoscope	49	49	$460.73	$127.84
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	49	49	$582.71	$177.10
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	38	32	$539.42	$138.76
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	34	19	$270.00	$88.04
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	32	32	$731.13	$241.95
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	30	26	$651.00	$199.97
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	22	21	$757.00	$193.10
99213 Established patient office or other outpatient visit, typically 15 minutes	17	14	$381.29	$97.22

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	59	59	$614.00	$175.97
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	52	29	$259.50	$78.52
46600 Diagnostic examination of the anus using an endoscope	50	45	$474.96	$114.50
99213 Established patient office or other outpatient visit, typically 15 minutes	40	26	$382.52	$100.58
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	36	33	$557.08	$142.84
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	27	27	$750.67	$243.93
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	18	18	$726.22	$214.65
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	17	11	$365.88	$112.91
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	15	15	$499.20	$148.34
45330 Diagnostic exam of lower portion of large bowel using a flexible endoscope	15	14	$1287.40	$59.71
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	14	12	$624.71	$197.26

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	50	29	$256.00	$81.23
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	39	39	$641.00	$187.88
99213 Established patient office or other outpatient visit, typically 15 minutes	38	27	$311.00	$104.46
99231 Follow-up hospital inpatient care per day, typically 15 minutes	27	17	$152.00	$43.30
46600 Diagnostic examination of the anus using an endoscope	24	24	$395.00	$136.51
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	23	22	$502.00	$153.26
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	20	18	$417.00	$148.98
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	19	19	$748.00	$242.83
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	18	18	$721.00	$226.32

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	47	29	$272.00	$81.70
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	28	28	$767.00	$228.43
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	25	25	$681.00	$192.26
99213 Established patient office or other outpatient visit, typically 15 minutes	24	20	$330.00	$87.81
99231 Follow-up hospital inpatient care per day, typically 15 minutes	17	14	$162.00	$44.22
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	15	15	$534.00	$154.61
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	15	12	$443.00	$129.30
46600 Diagnostic examination of the anus using an endoscope	13	12	$420.00	$132.45

Medical Specialties & State Licenses

CMS Verified: 2024-06-11

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License CA A126753

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

Stanford Health Care

300 Pasteur Dr, Stanford, CA 943052200

Phone: 6507234000

Stanford Health Care

5555 W Las Positas Blvd, Pleasanton, CA 945884000

Phone: 9258473000

Stanford Health Care

5725 W Las Positas Blvd, Pleasanton, CA 945884007

Stanford Health Care

5800 Hollis St, Emeryville, CA 946082016

Phone: 5108062100

Secondary Practice Locations

5800 Hollis St

Emeryville, CA 946082016

Phone: 5108062100

Practice Associates & Co-Workers

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

11 Associated Practitioners

Dr. Kavitha Raj , MD

Internal Medicine - Medical Oncology

NPI 1053450767

Doctor of Medicine (M.D.)

Dr. Ruby Maini , MD

Internal Medicine - Medical Oncology

NPI 1063906063

Doctor of Medicine (M.D.)

Dr. Barbara Egan , MD

Internal Medicine - Medical Oncology

NPI 1154418622

Doctor of Medicine (M.D.)

Dr. Thomas Yang Sun , MD

Internal Medicine - Medical Oncology

NPI 1215468160

Doctor of Medicine (M.D.)

Amita Saggi , PA-C

Physician Assistant

NPI 1346580503

Physician Assistant (Certified)

Sadaf Nagshbandi , PA-C

Physician Assistant

NPI 1386398857

Physician Assistant (Certified)

Career & Practice History Timeline

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

11 Historical Events

📍

Updated Practice Location June 11, 2024

Registered at 5725 W LAS POSITAS BLVD STE 100, PLEASANTON, CA 945884007 (Tel: 9257348130)

📍

Updated Practice Location April 27, 2024

Registered at 300 PASTEUR DR, PALO ALTO, CA 943042203 (Tel: 6507234000)

📍

Updated Business Mailing Address April 27, 2024

Registered at 300 PASTEUR DR, PALO ALTO, CA 943042203 (Tel: 6507234000)

📍

Updated Practice Location September 06, 2019

Registered at 300 PASTEUR DR, STANFORD, CA 943052200 (Tel: 6507361270)

📍

Updated Business Mailing Address September 06, 2019

Registered at 300 PASTEUR DR, STANFORD, CA 943052200

✅

NPI Profile Active December 04, 2015

NPI status registered as active in NPPES database

📍

Updated Practice Location December 04, 2015

Registered at 101 THE CITY DR S, ORANGE, CA 928683201 (Tel: 7144567890)

📍

Updated Business Mailing Address December 04, 2015

Registered at 101 THE CITY DR S, ORANGE, CA 928683201 (Tel: 7144567890)

👤

Provider Name / Credentials Updated December 04, 2015

Recorded as JOHN GAHAGAN, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) December 04, 2015

Surgery (License #A126753 in CA)

🟢

Initial NPI Registration & Enumeration April 29, 2012

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: 1558629493

Entity Type:

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

Enumeration Date: April 29, 2012

Last Update: June 11, 2024

Sole Proprietor: No

Update or Correct Profile

Mailing Address

300 Pasteur Dr

Palo Alto, CA 943042203

Phone: 6507234000

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.