What is Mark Williams's specialty?

Mark Williams (NPI 1679505440) is a Medicare-billing provider whose primary specialty is Anesthesiology in Phoenix, AZ.

Where does Mark Williams practice?

Mark Williams practices in Phoenix, AZ, based on the location reported in the CMS Medicare provider datasets for NPI 1679505440.

How much does Medicare pay Mark Williams?

Mark Williams (NPI 1679505440) received approximately $37K in total Medicare Part B payments, serving 119 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1679505440

Mark WilliamsMD

PRACTICEHONORHEALTHSee all providers at this practice →

AnesthesiologyPhoenix, AZI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$10K

Peer benchmark

Total Medicare services vs. 1,032 Anesthesiology providers in AZ — below median (cohort median 181).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$44

Payment records

By payment type

Education$26

Food and Beverage$18

Top paying entities

Education$26

Food and Beverage$18

REFERRAL NETWORK

Where Mark Williams'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). 1 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Louis Rappoport Orthopedic Surgery · Phoenix, AZ	20	59

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