1. Home
  2. Directory
  3. California
  4. Travis Afb
  5. Emergency Medicine
  6. NPI Profile

WILLIAM KEN MCCALLUM MD
NPI 1831658806
Emergency Medicine in Travis Afb, CA

Active since March 18, 2019PECOS Enrolled
60 MDG/SGGE, 101 BODIN CIRCLE, TRAVIS AFB, CA 94535(707) 423-3825 Get Directions Write a Review

NPPES record last updated: May 1, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 1, 2024, Oct 1, 2022, Aug 3, 2022 and 2 more (5 updates tracked since 2019).

About William Ken Mccallum Md NPPES

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

WILLIAM KEN MCCALLUM MD (NPI 1831658806) is an individual emergency medicine provider in Travis Afb, California, licensed in California (178163) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1831658806
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameWILLIAM KEN MCCALLUMCredential: MD
Location Address60 MDG/SGGE, 101 BODIN CIRCLETravis Afb, CA 94535-1800
Mailing Address101 Bodin CirTravis Afb, CA 94535-1809
Phone(707) 423-3825
Sole ProprietorNo
Enumeration DateMarch 18, 2019
Last NPPES UpdateMay 1, 20245 updates tracked since enumeration
NPPES CertifiedMay 1, 2024
✔ NPI 1831658806 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · 178163
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
Also ListedMilitary Health Care ProviderTaxonomy 171000000X
60 MDG/SGGE, Travis Afb, CA 94535
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Ken Mccallum 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

2

Medicare enrollment records show William Mccallum reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Permanente Medical Group Inc
19 mi
Internal Medicine
975 SERENO DRIVE
Vallejo, CA 94589
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1336222397 (707) 651-1000
Regents Of The Univ Of Ca
21 mi
Medical Microbiology
3146 TUPPER HALL
Davis, CA 95616
  • Reassigned Medicare billing, California enrollment
  • 2,570 clinicians in this Medicare group
NPI 1053304071 (530) 752-9402

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 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 4

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

CYDNEY ELIZABETH MIDDLETON MD
Emergency Medicine
60 MDG/SGGE, 101 BODIN CIRCLE
TRAVIS AFB, CA 94535
Solano County (707) 423-3825
JESSE WEBB MD
Emergency Medicine
60 MDG/SGGE, 101 BODIN CIR
TRAVIS AFB, CA 94535
Solano County (707) 423-3825
DR. HOANVU NGOC NGUYEN M.D.
Emergency Medicine
60 MDG/SGGE, 101 BODIN CIR
TRAVIS AFB, CA 94535
Solano County (707) 423-3825
LIFAN FAN MD
Emergency Medicine
60 MDG/SGGE, 101 BODIN CIRCLE
TRAVIS AFB, CA 94535
Solano County (707) 423-3825

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 William Mccallum's NPI number?

The NPI number for William Mccallum is 1831658806. It was assigned to this individual provider in the NPPES registry on March 18, 2019.

Where is William Mccallum located?

William Mccallum practices at 60 Mdg/Sgge 101 Bodin Circle, Travis Afb, CA 94535. The listed phone number is (707) 423-3825.

What is William Mccallum's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is William Mccallum enrolled in Medicare?

Yes. William Mccallum is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Mccallum's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Mccallum reassigns Medicare benefits to 2 organizations: Permanente Medical Group Inc (Vallejo, CA) and Regents Of The Univ Of Ca (Davis, CA). 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 William Mccallum's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Mccallum was last updated on May 1, 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.