What is Walter Nieri's specialty?

Walter Nieri (NPI 1265488258) is a Medicare-billing provider whose primary specialty is Internal Medicine in Phoenix, AZ.

Where does Walter Nieri practice?

Walter Nieri practices in Phoenix, AZ, based on the location reported in the CMS Medicare provider datasets for NPI 1265488258.

How much does Medicare pay Walter Nieri?

Walter Nieri (NPI 1265488258) received approximately $7K in total Medicare Part B payments, serving 24 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1265488258

Walter NieriM.D.

Internal MedicinePhoenix, AZI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$7K

Peer benchmark

Total Medicare services vs. 1,880 Internal Medicine providers in AZ — bottom quintile (cohort median 646).

PRESCRIBING · PART D · 2024

Total Rx claims

1,180

Beneficiaries

—

Total drug cost

$66K

Distinct drugs

Brand share

18.7%

Top prescribed drugs

Levothyroxine Sodium96 claims

Citalopram Hydrobromide81 claims

Donepezil Hcl79 claims

Atorvastatin Calcium76 claims

Quetiapine Fumarate69 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (2)

CCN 031592

Hospice

CCN 031623

Hospice

REFERRAL NETWORK

Where Walter Nieri's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 5 inbound referrers · 6 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
BANNER THUNDERBIRD MEDICAL CENTER	14	22
NGUYEN, LINH	13	25
R M Arizona Holdings Inc Ambulance Service Provider · Mesa, AZ	12	29
Kamran Farahani Podiatry · Phoenix, AZ	11	36
NIGHTINGALE NURSES INC.	11	21

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
HOSPICE OF ARIZONA, LC	137	637
Sonora Quest Laboratories Llc Clinical Laboratory · Phoenix, AZ	36	182
BANNER BOSWELL MEDICAL CENTER	14	55
Bakorp Llc Portable X-Ray Supplier · Tempe, AZ	13	40
Kamran Farahani Podiatry · Phoenix, AZ	12	44
NIGHTINGALE NURSES INC.	11	38

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events