What is Caroline Onstott's specialty?

Caroline Onstott (NPI 1689635393) is a Medicare-billing provider whose primary specialty is Physician Assistant in Phoenix, AZ.

Where does Caroline Onstott practice?

Caroline Onstott practices in Phoenix, AZ, based on the location reported in the CMS Medicare provider datasets for NPI 1689635393.

How much does Medicare pay Caroline Onstott?

Caroline Onstott (NPI 1689635393) received approximately $6K in total Medicare Part B payments, serving 61 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1689635393

Caroline OnstottPA-C

PRACTICEMAYO CLINIC ARIZONASee all providers at this practice →

Physician AssistantPhoenix, AZI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$2K

Peer benchmark

Total Medicare services vs. 2,639 Physician Assistant providers in AZ — below median (cohort median 341).

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$764

Distinct drugs

Brand share

0.0%

Top prescribed drugs

Tamsulosin Hcl25 claims

Oxycodone Hcl20 claims

Finasteride14 claims

QUALITY · MIPS · 2024

Final MIPS score

86.5

Quality

78.3

Cost

76.6

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.48%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Caroline Onstott'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). 4 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
MAYO CLINIC ARIZONA	111	176
Robert Ferrigni Urology · Phoenix, AZ	31	36
Mitchell Humphreys Urology · Phoenix, AZ	30	80
Erik Castle Urology · New Orleans, LA	19	41

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

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