DR. MARY ELLEN O'BRIEN NMD, FNP
NPI 1285750240
Nurse Practitioner - Family in Tempe, AZ

Active since March 22, 2007Opted out of Medicare · through Apr 1, 2027
2127 E BASELINE RD, SUITE 103, TEMPE, AZ 85283(480) 491-1716(480) 491-5920 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Dr. Mary Ellen O'brien Nmd, Fnp NPPES

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

DR. MARY ELLEN O'BRIEN NMD, FNP (NPI 1285750240) is an individual family provider in Tempe, Arizona, licensed in Arizona (RN087042) and active in the NPI registry since March 2007. She has opted out of Medicare through April 1, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1285750240
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameDR. MARY ELLEN O'BRIENCredential: NMD, FNP
Location Address2127 E BASELINE RD, SUITE 103Tempe, AZ 85283-1537
Mailing Address8325 E Keim DrScottsdale, AZ 85250-5847 · (480) 481-7872
Fax(480) 491-5920
Sole ProprietorYes
Enumeration DateMarch 22, 2007
Last NPPES UpdateSeptember 11, 2025
NPI 1285750240 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License Licensed in AZ · RN087042
Also ListedNaturopathTaxonomy 175F00000X · License 97-514 (AZ)
2127 E BASELINE RD, Tempe, AZ 85283

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Opted out of Medicare

Dr. Mary Ellen O'brien Nmd, Fnp has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from April 1, 2017 through April 1, 2027.

Opt-Out Effective DateApril 1, 2017
Opt-Out In Effect ThroughApril 1, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85283 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 3

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

Massage Therapist
2127 E BASELINE RD, SUITE 101
TEMPE, AZ 85283
Massage Therapist
2127 E BASELINE RD, 101
TEMPE, AZ 85283
Family Medicine
2127 E BASELINE RD, 104
TEMPE, AZ 85283

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1285750240, enumerated as an "individual" on March 22, 2007.

The provider is located at 2127 E BASELINE RD SUITE 103 TEMPE, AZ 85283 and the phone number is (480) 491-1716.

Nurse Practitioner with taxonomy code 363LF0000X and a focus in Family.