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JOHN VICTOR GAHAGAN M.D.
NPI 1558629493
Surgery in Pleasanton, CA

Active since April 29, 2012PECOS EnrolledAccepts Medicare Assignment
5725 W LAS POSITAS BLVD STE 100, PLEASANTON, CA 94588(925) 734-8130 Get Directions Write a Review

NPPES record last updated: June 11, 2024. Verified against the NPPES registry weekly; last sync: September 27, 2026.

Record update history: Jun 11, 2024, Apr 27, 2024, Sep 6, 2019 and 2 more (5 updates tracked since 2015).

About John Victor Gahagan M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN VICTOR GAHAGAN M.D. (NPI 1558629493) is an individual surgery provider in Pleasanton, California, licensed in California (A126753) and active in the NPI registry since April 2012. He is enrolled in Medicare PECOS, maintains a secondary practice location in Emeryville, and is a graduate of Other (2012).

NPPES Registry Identity

NPI1558629493
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameJOHN VICTOR GAHAGANCredential: M.D.
Location Address5725 W LAS POSITAS BLVD STE 100Pleasanton, CA 94588-4007
Mailing Address300 Pasteur DrPalo Alto, CA 94304-2203 · (650) 723-4000
Phone(925) 734-8130
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateApril 29, 2012
Last NPPES UpdateJune 11, 20245 updates tracked since enumeration
NPPES CertifiedJune 11, 2024
✔ NPI 1558629493 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in CA · A126753
Definition
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.
5725 W LAS POSITAS BLVD STE 100, Pleasanton, CA 94588
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Secondary Practice Location 1

Location 15800 Hollis StEmeryville, CA 94608-2016 · Phone (510) 806-2100

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

John Victor Gahagan M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7911216049
PECOS Enrollment IDI20151012001500
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 9

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
75 services53 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
54 services28 patients
Diagnostic exam of anus using an endoscope 46600
This procedure involves using a thin, flexible instrument called an endoscope to examine the anal area. It helps detect any abnormal conditions or issues. It's a safe, routine exam performed by a healthcare professional.
51 services48 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
44 services44 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
40 services40 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
28 services28 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94588 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 6

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Skin barrier; solid, 4 x 4 or equivalent; each A4362
DME-Orthotic Devices · category DF010N
3 suppliers17 claims330 services$3.30 avg. paid by Medicare
Ostomy skin barrier, solid 4 x 4 or equivalent, extended wear, without built-in convexity, each A4385
DME-Orthotic Devices · category DF010N
4 suppliers29 claims602 services$4.91 avg. paid by Medicare
Ostomy deodorant, with or without lubricant, for use in ostomy pouch, per fluid ounce A4394
DME-Orthotic Devices · category DF010N
4 suppliers14 claims270 services$2.49 avg. paid by Medicare
Ostomy skin barrier, with flange (solid, flexible, or accordion), extended wear, with built-in convexity, 4 x 4 inches or smaller, each A4407
DME-Orthotic Devices · category DF010N
4 suppliers30 claims700 services$8.26 avg. paid by Medicare
Ostomy pouch, drainable; for use on barrier with non-locking flange, with filter (2 piece system), each A4425
DME-Orthotic Devices · category DF010N
3 suppliers13 claims280 services$3.45 avg. paid by Medicare
Ostomy pouch, drainable; for use on barrier with flange (2 piece system), each A5063
DME-Orthotic Devices · category DF010N
2 suppliers11 claims220 services$2.61 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

RUBY MAINI MD
Internal Medicine (Medical Oncology)
5725 W LAS POSITAS BLVD STE 100
PLEASANTON, CA 94588
Alameda County (925) 734-8130
SADAF NAGSHBANDI PA-C
Physician Assistant
5725 W LAS POSITAS BLVD STE 100
PLEASANTON, CA 94588
Alameda County (925) 734-8130
SHANNON MARIE GEORGE PA-C
Physician Assistant
5725 W LAS POSITAS BLVD STE 100
PLEASANTON, CA 94588
Alameda County (833) 444-7622
AKHIL MEHTA DO
Internal Medicine (Medical Oncology)
5725 W LAS POSITAS BLVD STE 100
PLEASANTON, CA 94588
Alameda County (925) 734-8130
SANNA DAQIQ PA-C
Physician Assistant
5725 W LAS POSITAS BLVD STE 100
PLEASANTON, CA 94588
Alameda County (925) 734-8130

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Gahagan's NPI number?

The NPI number for John Gahagan is 1558629493. It was assigned to this individual provider in the NPPES registry on April 29, 2012.

Where is John Gahagan located?

John Gahagan practices at 5725 W Las Positas Blvd Ste 100, Pleasanton, CA 94588. The listed phone number is (925) 734-8130.

What is John Gahagan's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is John Gahagan enrolled in Medicare?

Yes. John Gahagan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for John Gahagan was last updated on June 11, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.