MICHAEL CHRISTOPHER GYNN MD
NPI 1366462491
Surgery in Pleasanton, CA

Q: What is Michael Gynn's NPI number?

The NPI number for Michael Gynn is 1366462491. It was assigned to this individual provider in the NPPES registry on July 20, 2006.

Q: What is Michael Gynn's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Michael Gynn was last updated on March 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months 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.

Active since July 20, 2006PECOS Enrolled

5555 W LAS POSITAS BLVD, PLEASANTON, CA 94588(925) 416-3440 Get Directions Write a Review

NPPES record last updated: March 12, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Michael Christopher Gynn Md NPPES

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

MICHAEL CHRISTOPHER GYNN MD (NPI 1366462491) is an individual surgery provider in Pleasanton, California, licensed in California (A79766) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in French Camp.

NPPES Registry Identity

NPI1366462491

Entity TypeIndividualMale

Primary Taxonomy208600000X

Provider Legal NameMICHAEL CHRISTOPHER GYNNCredential: MD

Location Address5555 W LAS POSITAS BLVDPleasanton, CA 94588-4000

Mailing Address5555 W Las Positas BlvdPleasanton, CA 94588-4000 · (925) 416-3440

Phone(925) 416-3440

Sole ProprietorNo

Enumeration DateJuly 20, 2006

Last NPPES UpdateMarch 12, 2025

NPPES CertifiedMarch 12, 2025

✔ NPI 1366462491 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in CA · A79766

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.

5555 W LAS POSITAS BLVD, Pleasanton, CA 94588

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Secondary Practice Location 1

Location 1500 W. Hospital Rd.French Camp, CA 95231 · Phone (209) 468-6937 · Fax (209) 468-7042

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Michael Christopher Gynn Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignments

Medicare enrollment records show Michael Gynn reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Stanford Health Care

0.5 mi

Radiation Oncology

5725 W LAS POSITAS BLVD, SUITE 100B
Pleasanton, CA 94588

Reassigned Medicare billing, California enrollment
4,258 clinicians in this Medicare group

NPI 1124561758 (650) 723-4000

University Healthcare Alliance

15 mi

Internal Medicine

7999 GATEWAY BLVD STE 200
Newark, CA 94560

Reassigned Medicare billing, California enrollment
435 clinicians in this Medicare group

NPI 1760531198 (888) 924-1036

Contra Costa County

21 mi

Adult Mental Health

1420 WILLOW PASS RD
Concord, CA 94520

Reassigned Medicare billing, California enrollment
530 clinicians in this Medicare group

NPI 1023188489 (925) 646-5480

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

Other Providers at the Same Location NPPES 20

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

DESMOND CHEE

Physician Assistant