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Family Practice

Terena D. Gimmillaro, DO

Works at hospitals in Portland, OR · Oregon

Summary

Dr. Terena D. Gimmillaro, DO is a family doctor at 1321 NE 99th Ave, Suite 200, Portland, OR 97220. Phone: (503) 215-4250. Accepts Medicare assignment. In 2024, Terena D. Gimmillaro had 23 Original Medicare patients and 52 services. NPI 1235574955. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Family doctor (Medicare lists Family Practice)
  • Address: 1321 NE 99th Ave, Suite 200, Portland, OR 97220 · Directions (2 more locations)
  • Phone: (503) 215‑4250
  • Medicare: Accepts Medicare assignment
  • Hospital: Providence Portland Medical Center
  • Group practice: Providence Health and Services Oregon
  • Medical school: graduated 2013 (13 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Terena D. Gimmillaro, 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 Terena D. Gimmillaro accept Medicare assignment?
Yes. Medicare's clinician data says Terena D. Gimmillaro 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 Terena D. Gimmillaro see?
In 2024, CMS data shows 23 Original Medicare patients and 52 services for Terena D. Gimmillaro. This counts Original Medicare only and measures volume, not quality.
What is Terena D. Gimmillaro's NPI number?
1235574955. 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 Terena D. Gimmillaro, 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 patients23
Services billed to Medicare52
Different services or procedures6
Participating Medicare providerYes
Average age of these patients59

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)25 services
  2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)23 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%
  • Anxiety75%
  • Depression65%
  • High cholesterol48%

Hospitals where Terena D. Gimmillaro works

Medicare's Facility Affiliation Data lists Terena D. Gimmillaro at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Terena D. Gimmillaro is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Terena D. Gimmillaro as a member of this group (CMS data updated October 2, 2026).

  • Providence Health and Services Oregon1,433 clinicians in the group

Specialties

Find other Family Practice doctors in Oregon →

Other family doctors in Portland

Clinicians with the same Medicare primary specialty in Portland, OR — not a recommendation.

All family doctors in Portland →

Other clinicians in Providence Health and Services Oregon

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

Clinician information

CredentialDO
Graduation year2013 (13 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1235574955
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 October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians