Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Internal Medicine

Thomas B. Alan, MD

Works at hospitals in Davis, CA · Sacramento, CA · California

Summary

Thomas B. Alan, MD (Internal Medicine) is listed by Medicare at 2 hospitals in Davis, CA and Sacramento, CA. NPI 1235115635. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Thomas B. Alan, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Internal MedicinePrimary specialty
YesAccepts Medicare assignment
YesOffers telehealth
30Years since medical school (graduated 1996)
Creighton University School Of MedicineMedical school
MaleGender (as listed)
Regents of the University of CaliforniaGroup practice

Quick answers

Which hospitals does Thomas B. Alan work at?
Medicare's official clinician data lists Thomas B. Alan at 2 hospitals: Sutter Davis Hospital and University of California Davis Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Thomas B. Alan see patients?
Medicare's clinician data lists 1 practice location in Sacramento, CA. Call before your visit to confirm the address.
What is Thomas B. Alan's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does Thomas B. Alan accept Medicare assignment?
Yes. Medicare's clinician data says Thomas B. Alan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
Does Thomas B. Alan offer telehealth?
Medicare's clinician data says Thomas B. Alan offers telehealth services. Ask the office which visits can be done by video or phone.
What is the phone number for Thomas B. Alan?
(916) 734-7777, as listed in official Medicare / NPI Registry data.
What is Thomas B. Alan's NPI number?
1235115635. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Thomas B. Alan works

Medicare's Facility Affiliation Data lists Thomas B. Alan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Thomas B. Alan is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Thomas B. Alan as a member of this group (CMS data updated 2026-10-02).

  • Regents of the University of California567 clinicians in the group

Specialties

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Sacramento

Clinicians with the same Medicare primary specialty in Sacramento, CA — not a recommendation.

All internal medicine doctors in Sacramento →

Clinician information

CredentialMD
Medical schoolCreighton University School Of Medicine
Graduation year1996
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1235115635
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians