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WALKER A WYNKOOP M.D.
NPI 1760580427
Orthopaedic Surgery in Los Banos, CA

Active since September 20, 2006PECOS EnrolledAccepts Medicare Assignment
807 ILLINOIS AVE, LOS BANOS, CA 93635(209) 710-8695 Get Directions Write a Review

NPPES record last updated: February 19, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Feb 19, 2021, Jan 28, 2021 (2 updates tracked since 2021).

About Walker A Wynkoop M.d. NPPES

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

WALKER A WYNKOOP M.D. (NPI 1760580427) is an individual orthopaedic surgery provider in Los Banos, California, licensed in California (87898) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (1985).

NPPES Registry Identity

NPI1760580427
Entity TypeIndividualMale
Primary Taxonomy207X00000X
Provider Legal NameWALKER A WYNKOOPCredential: M.D.
Location Address807 ILLINOIS AVELos Banos, CA 93635-3512
Mailing Address807 Illinois AveLos Banos, CA 93635-3512 · (209) 710-8695
Phone(209) 710-8695
Sole ProprietorNo
Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 1985
Enumeration DateSeptember 20, 2006
Last NPPES UpdateFebruary 19, 20212 updates tracked since enumeration
NPPES CertifiedFebruary 19, 2021
✔ NPI 1760580427 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
License✔ Licensed in CA · 87898
Definition
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
807 ILLINOIS AVE, Los Banos, CA 93635
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Avera Health Plans.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Walker A Wynkoop 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 ID1355231424
PECOS Enrollment IDI20200413002871
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

4

Medicare enrollment records show Walker Wynkoop reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Surgical Affiliates Of California
Same address
Surgery
807 ILLINOIS AVE
Los Banos, CA 93635
  • Reassigned Medicare billing, California enrollment
  • 91 clinicians in this Medicare group
NPI 1932440781 (209) 710-8695
Signify Health Medical Associates Of California, PC
99 mi
General Practice
505 MONTGOMERY ST, FL 10 & 11
San Francisco, CA 94111
  • Reassigned Medicare billing, California enrollment
  • 407 clinicians in this Medicare group
NPI 1124685169 (972) 715-3800
Acute Care Surgery Medical Group, Inc.
109 mi
Surgery
2801 K STREET SUITE 440
Sacramento, CA 95816
  • Reassigned Medicare billing, California enrollment
  • 266 clinicians in this Medicare group
NPI 1700069549 (916) 441-0400
Signify Health Medical Associates, PLLC
1,388 mi
General Practice
4055 VALLEY VIEW LN STE 700
Dallas, TX 75244
  • Reassigned Medicare billing, Washington enrollment
  • 317 clinicians in this Medicare group
NPI 1750845863 (972) 715-3800

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

Areas of Expertise CMS Part B claims 7

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.

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301
Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.
94 services14 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
44 services32 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
29 services29 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
28 services22 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
25 services25 patients
Aspiration and/or injection of fluid from large joint 20610
This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.
23 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93635 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
$90.32 typical visit price
range $58.87 – $176.60
Typical copayment $22.58 (range $14.71 – $44.15)
Most-billed visit code 99203
Established Patient
$73.16 typical visit price
range $19.28 – $144.60
Typical copayment $18.29 (range $4.82 – $36.15)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
100%22 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 3

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

ABHIJIT SHALIGRAM MD
Surgery
807 ILLINOIS AVE
LOS BANOS, CA 93635
Merced County (209) 710-6333
DR. JOHN ARRIOLA MD
Surgery
807 ILLINOIS AVE
LOS BANOS, CA 93635
Merced County (209) 710-8695
SURGICAL AFFILIATES OF CALIFORNIA
Surgery
807 ILLINOIS AVE
LOS BANOS, CA 93635
Merced County (209) 710-8695

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 Walker Wynkoop's NPI number?

The NPI number for Walker Wynkoop is 1760580427. It was assigned to this individual provider in the NPPES registry on September 20, 2006.

Where is Walker Wynkoop located?

Walker Wynkoop practices at 807 Illinois Ave, Los Banos, CA 93635. The listed phone number is (209) 710-8695.

What is Walker Wynkoop's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is Walker Wynkoop enrolled in Medicare?

Yes. Walker Wynkoop 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.

Which organizations bill Medicare for Walker Wynkoop's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Walker Wynkoop reassigns Medicare benefits to 4 organizations: Surgical Affiliates Of California (Los Banos, CA), Signify Health Medical Associates Of California, PC (San Francisco, CA), Acute Care Surgery Medical Group, Inc. (Sacramento, CA) and Signify Health Medical Associates, PLLC (Dallas, TX). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Walker Wynkoop's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Walker Wynkoop accept?

Health plans from Avera Health Plans list Walker Wynkoop as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Walker Wynkoop was last updated on February 19, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.