What is Michael Arnstein's specialty?

Michael Arnstein (NPI 1821000100) is a Medicare-billing provider whose primary specialty is Plastic and Reconstructive Surgery in Torrance, CA.

Where does Michael Arnstein practice?

Michael Arnstein practices in Torrance, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1821000100.

How much does Medicare pay Michael Arnstein?

Michael Arnstein (NPI 1821000100) received approximately $338K in total Medicare Part B payments, serving 335 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1821000100

Michael ArnsteinM.D.

PRACTICEMICHAEL ARNSTEINSee all providers at this practice →

Plastic and Reconstructive SurgeryTorrance, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

839

Unique beneficiaries

—

Total services

1,460

Distinct HCPCS

Medicare payment

$263K

Peer benchmark

Total Medicare services vs. 396 Plastic and Reconstructive Surgery providers in CA — top quintile (cohort median 171).

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$361

Distinct drugs

Brand share

45.5%

Top prescribed drugs

Sulfamethoxazole/Trimethoprim30 claims

Mupirocin23 claims

Doxycycline Hyclate13 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$2K

Payment records

By payment type

Food and Beverage$2K

Top paying entities

Food and Beverage$2K

REFERRAL NETWORK

Where Michael Arnstein'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). 8 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Sidney Newman Dermatology · Los Alamitos, CA	149	300
OMNIPATH DIAGNOSTICS, INC	148	351
Unilab Corporation Clinical Laboratory · West Hills, CA	34	76
Ronald Holness General Surgery · Los Alamitos, CA	24	174
Nathan Chung General Surgery · Apple Valley, CA	24	197
Michael Radonich Dermatology · Los Alamitos, CA	19	38
Mauricio Heilbron General Surgery · Long Beach, CA	14	89
TORRANCE MEMORIAL MEDICAL CENTER	13	102

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