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Emergency Medicine

Allen I. Lin, DO

Sees patients in Davis, CA · Sacramento, CA · Elk Grove, CA · California

Summary

Dr. Allen I. Lin, DO is an emergency medicine doctor at 4515 Fermi Pl, Suite 105, Davis, CA 95618. Phone: (530) 759-9110. Accepts Medicare assignment. In 2024, Allen I. Lin had 19 Original Medicare patients and 44 services. NPI 1841271814. Source: CMS National Downloadable File, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Emergency medicine doctor (Medicare lists Emergency Medicine)
  • Address: 4515 Fermi Pl, Suite 105, Davis, CA 95618 · Directions (3 more locations)
  • Phone: (530) 759‑9110
  • Medicare: Accepts Medicare assignment
  • Group practice: Elk Grove Urgent Care Inc (+2 more)
  • Medical school: At Still University Of Health Sciences, College Of Osteo Med, Kirksville · graduated 2000 (26 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Allen I. Lin, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Allen I. Lin accept Medicare assignment?
Yes. Medicare's clinician data says Allen I. Lin accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Allen I. Lin see?
In 2024, CMS data shows 19 Original Medicare patients and 44 services for Allen I. Lin. This counts Original Medicare only and measures volume, not quality.
What is Allen I. Lin's NPI number?
1841271814. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Allen I. Lin, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients19
Services billed to Medicare44
Different services or procedures18
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)12 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol74%

Practice locations

Addresses where Allen I. Lin is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Allen I. Lin as a member of these groups (CMS data updated October 2, 2026).

  • Elk Grove Urgent Care Inc16 clinicians in the group
  • Capitol Urgent Care Inc13 clinicians in the group
  • Davis Urgent Care Inc8 clinicians in the group

Specialties

Find other Emergency Medicine doctors in California →

Other emergency medicine doctors in Davis

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

All emergency medicine doctors in Davis →

Other clinicians in Elk Grove Urgent Care Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialDO
Medical schoolAt Still University Of Health Sciences, College Of Osteo Med, Kirksville
Graduation year2000 (26 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1841271814
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. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  2. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  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