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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. RYAN LYNDELL WILLIAMSON DO
NPI 1356044093
Family Medicine in Fairfield, CA

Active since March 22, 2023PECOS Enrolled
101 BODIN CIR, FAIRFIELD, CA 94535(707) 423-3000 Get Directions Write a Review

NPPES record last updated: June 25, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Aug 7, 2025, Mar 16, 2025, Mar 22, 2023 (3 updates tracked since 2023).

About Dr. Ryan Lyndell Williamson Do NPPES

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

DR. RYAN LYNDELL WILLIAMSON DO (NPI 1356044093) is an individual family medicine provider in Fairfield, California, licensed in Indiana (02008118A) and active in the NPI registry since March 2023. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1356044093
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. RYAN LYNDELL WILLIAMSONCredential: DO
Location Address101 BODIN CIRFairfield, CA 94535-1809
Mailing Address101 Bodin CirFairfield, CA 94535-1809 · (707) 423-3792 · Fax (707) 423-3501
Phone(707) 423-3000
Sole ProprietorNo
Enumeration DateMarch 22, 2023
Last NPPES UpdateJune 25, 20263 updates tracked since enumeration
NPPES CertifiedJune 25, 2026
✔ NPI 1356044093 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in IN · 02008118A
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
101 BODIN CIR, Fairfield, CA 94535
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Ryan Lyndell Williamson Do 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94535 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
$98.85 typical visit price
range $65.02 – $191.95
Typical copayment $24.71 (range $16.25 – $47.98)
Most-billed visit code 99203
Established Patient
$113.05 typical visit price
range $21.86 – $157.69
Typical copayment $28.26 (range $5.46 – $39.42)
Most-billed visit code 99214
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.

EDWARD SEAN RODRIGUEZ I.D.M.T
Military Health Care Provider (Independent Duty Medical Technicians)
101 BODIN CIR
TRAVIS AFB, CA 94535
Solano County (707) 423-5478
KENDRA MONICA HILL PT
Physical Therapist
101 BODIN CIR
TRAVIS AFB, CA 94535
Solano County (707) 423-3000
TIMOTHY GUENTHER MD
Thoracic Surgery (Cardiothoracic Vascular Surgery)
101 BODIN CIR
TRAVIS AFB, CA 94535
Solano County (707) 423-3000
ANGELA GIESE MD
Surgery (Vascular Surgery)
101 BODIN CIR
FAIRFIELD, CA 94535
Solano County (707) 423-3000
DR. JOSCELYN D. A. C. AQUININGOC PHARMD
Pharmacist
101 BODIN CIR
TRAVIS AFB, CA 94535
Solano County (626) 297-8649
CATHERINE CELINE BRANSTETTER
Dentist (General Practice)
101 BODIN CIR
TRAVIS AFB, CA 94535
Solano County (707) 423-7085
MEGAN ELIZABETH LEE MD
Student in an Organized Health Care Education/Training Program
101 BODIN CIR
FAIRFIELD, CA 94535
Solano County (707) 423-3000
DR. STEVEN DANIEL DEMARTINI M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
101 BODIN CIR
TRAVIS AFB, CA 94535
Solano County (707) 423-3000

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 Ryan Williamson's NPI number?

The NPI number for Ryan Williamson is 1356044093. It was assigned to this individual provider in the NPPES registry on March 22, 2023.

Where is Ryan Williamson located?

Ryan Williamson practices at 101 Bodin Cir, Fairfield, CA 94535. The listed phone number is (707) 423-3000.

What is Ryan Williamson's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Ryan Williamson enrolled in Medicare?

Yes. Ryan Williamson is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Ryan Williamson was last updated on June 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 44 days 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.