What is Mary Koumas's specialty?

Mary Koumas (NPI 1306838909) is a Medicare-billing provider whose primary specialty is Family Practice in Lake Forest, CA.

Where does Mary Koumas practice?

Mary Koumas practices in Lake Forest, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1306838909.

How much does Medicare pay Mary Koumas?

Mary Koumas (NPI 1306838909) received approximately $34K in total Medicare Part B payments, serving 99 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1306838909

Mary KoumasD.O.

PRACTICELAKE FOREST MEDICAL GROUP, INC.See all providers at this practice →

Family PracticeLake Forest, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

200

Unique beneficiaries

—

Total services

362

Distinct HCPCS

Medicare payment

$33K

Peer benchmark

Total Medicare services vs. 8,228 Family Practice providers in CA — below median (cohort median 411).

PRESCRIBING · PART D · 2024

Total Rx claims

1,203

Beneficiaries

—

Total drug cost

$49K

Distinct drugs

Brand share

13.8%

Top prescribed drugs

Levothyroxine Sodium116 claims

Atorvastatin Calcium102 claims

Simvastatin65 claims

Losartan Potassium61 claims

Omeprazole45 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 (1)

CCN 050603

Hospital

REFERRAL NETWORK

Where Mary Koumas'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 · 7 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
SADDLEBACK MEMORIAL MEDICAL CENTER	58	473
Unilab Corporation Clinical Laboratory · West Hills, CA	43	142
John Koumas Family Practice · West Covina, CA	21	135
Seyed Shahrokni Diagnostic Radiology · Santa Monica, CA	12	23

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
SADDLEBACK MEMORIAL MEDICAL CENTER	46	324
Unilab Corporation Clinical Laboratory · West Hills, CA	45	146
John Koumas Family Practice · West Covina, CA	26	120
Laboratory Corporation Of America Clinical Laboratory · San Diego, CA	22	124
MISSION HOSPITAL REGIONAL MEDICAL CENTER	16	125
Seyed Shahrokni Diagnostic Radiology · Santa Monica, CA	12	31
Kim Tang Dermatology · Lake Forest, CA	11	33

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