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

DOROTHY A TRIMMER F.N.P.
NPI 1891756045
Nurse Practitioner - Family in Mesa, AZ

Q: What is Dorothy Trimmer's NPI number?

The NPI number for Dorothy Trimmer is 1891756045. It was assigned to this individual provider in the NPPES registry on March 29, 2006.

Q: What is Dorothy Trimmer's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Q: When was this NPI record last updated?

The NPPES record for Dorothy Trimmer was last updated on September 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.

Active since March 29, 2006PECOS EnrolledAccepts Medicare Assignment

3638 E SOUTHERN AVE STE C108, MESA, AZ 85206(480) 834-0771(480) 834-1136 Get Directions Write a Review

NPPES record last updated: September 30, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 30, 2026, Nov 3, 2022 (2 updates tracked since 2022).

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About Dorothy A Trimmer F.n.p. NPPES

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

DOROTHY A TRIMMER F.N.P. (NPI 1891756045) is an individual family provider in Mesa, Arizona, licensed in Arizona (NPCERTIFICATE #397) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1976).

NPPES Registry Identity

NPI1891756045

Entity TypeIndividualFemale

Primary Taxonomy363LF0000X

Provider Legal NameDOROTHY A TRIMMERCredential: F.N.P.

Location Address3638 E SOUTHERN AVE STE C108Mesa, AZ 85206-2564

Mailing Address3638 E Southern Ave Ste C108Mesa, AZ 85206-2564 · (480) 834-0771 · Fax (480) 834-1136

Phone(480) 834-0771

Fax(480) 834-1136

Sole ProprietorNo

Medical School CMSOtherGraduated 1976

Enumeration DateMarch 29, 2006

Last NPPES UpdateSeptember 30, 20262 updates tracked since enumeration

NPPES CertifiedSeptember 30, 2026

✔ NPI 1891756045 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LF0000X

Licenses✔ Licensed in AZ · NPCERTIFICATE #397✔ Licensed in AZ · RN048734

3638 E SOUTHERN AVE STE C108, Mesa, AZ 85206

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dorothy A Trimmer F.n.p. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5698813384

PECOS Enrollment IDI20091118000203

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

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

4C Medical Group Plc

15 mi

Multi-Specialty

9590 E IRONWOOD SQUARE DR STE 125
Scottsdale, AZ 85258

Reassigned Medicare billing, Arizona enrollment
118 clinicians in this Medicare group

NPI 1558654384 (480) 455-3000

Greater Phoenix Collaborative Care PC

24 mi

Clinic/Center

8041 N BLACK CANYON HWY
Phoenix, AZ 85021

Reassigned Medicare billing, Arizona enrollment
190 clinicians in this Medicare group

NPI 1750686614 (602) 249-0115

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

128 services82 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

77 services60 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

48 services48 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

13 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85206 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

$85.89 typical visit price

range $55.44 – $168.60

Typical copayment $21.47 (range $13.86 – $42.15)

Most-billed visit code 99203

Established Patient

$98.00 typical visit price

range $17.72 – $137.41

Typical copayment $24.50 (range $4.43 – $34.35)

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 5

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

CENTRAL ARIZONA GASTROENTEROLOGY PC

Internal Medicine (Gastroenterology)