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DR. WALTER JOHN NIERI M.D.
NPI 1265488258
Internal Medicine - Geriatric Medicine in Phoenix, AZ

Active since May 25, 2006PECOS EnrolledAccepts Medicare Assignment
6510 N 27TH ST, PHOENIX, AZ 85016(602) 885-1988(602) 951-9750 Get Directions Write a Review

NPPES record last updated: February 24, 2009. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Walter John Nieri M.d. NPPES

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

DR. WALTER JOHN NIERI M.D. (NPI 1265488258) is an individual geriatric medicine provider in Phoenix, Arizona, licensed in Arizona (6055) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1968).

NPPES Registry Identity

NPI1265488258
Entity TypeIndividualMale
Primary Taxonomy207RG0300X
Provider Legal NameDR. WALTER JOHN NIERICredential: M.D.
Location Address6510 N 27TH STPhoenix, AZ 85016-8943
Mailing Address6510 N 27th StPhoenix, AZ 85016-8943 · (902) 885-1988 · Fax (602) 952-9750
Phone(602) 885-1988
Fax(602) 951-9750
Sole ProprietorNo
Medical School CMSOtherGraduated 1968
Enumeration DateMay 25, 2006
Last NPPES UpdateFebruary 24, 2009
✔ NPI 1265488258 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Geriatric MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RG0300X
License✔ Licensed in AZ · 6055
Definition
An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.
6510 N 27TH ST, Phoenix, AZ 85016
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Other Identifiers 3

Medicare UPIND00038AZ
Medicare ID-Type Unspecified29344AZ
Medicare PINZ124152

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health Plan, Inc..Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Walter John Nieri M.d. 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 ID8325139777
PECOS Enrollment IDI20070814000568
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.

Areas of Expertise CMS Part B claims

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.

Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes 99349
An established patient home visit is a medical appointment conducted at your home, typically lasting around 40 minutes. This service is ideal for patients who may find it difficult to travel to a healthcare facility. During this visit, a healthcare professional will evaluate your health status, manage your care, and answer any health-related questions you may have.
87 services23 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85016 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
$168.60 typical visit price
range $55.44 – $168.60
Typical copayment $42.15 (range $13.86 – $42.15)
Most-billed visit code 99205
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.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Walter Nieri's NPI number?

The NPI number for Walter Nieri is 1265488258. It was assigned to this individual provider in the NPPES registry on May 25, 2006.

Where is Walter Nieri located?

Walter Nieri practices at 6510 N 27th St, Phoenix, AZ 85016. The listed phone number is (602) 885-1988.

What is Walter Nieri's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.

Is Walter Nieri enrolled in Medicare?

Yes. Walter Nieri is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Walter Nieri accept?

Health plans from Oscar Health Plan, Inc. list Walter Nieri as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Walter Nieri was last updated on February 24, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years 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.