PROVIDER PROFILE · NPI 1558322479

Mark LeeMD

PRACTICEWILLY SINGH DO INCSee all providers at this practice →

NephrologyWhittier, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

306

Unique beneficiaries

—

Total services

1,063

Distinct HCPCS

Medicare payment

$214K

Peer benchmark

Total Medicare services vs. 985 Nephrology providers in CA — below median (cohort median 1,482).

PRESCRIBING · PART D · 2024

Total Rx claims

3,650

Beneficiaries

—

Total drug cost

$1.1M

Distinct drugs

Brand share

33.0%

Top prescribed drugs

Parenteral Amino Acid 20% No.1269 claims

Amlodipine Besylate212 claims

Sucroferric Oxyhydroxide207 claims

Sevelamer Carbonate205 claims

Dapagliflozin Propanediol156 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$697

Payment records

By payment type

Food and Beverage$697

REFERRAL NETWORK

Where Mark Lee'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). 54 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
NPI 1255335535	140	1,691
PIH HEALTH DOWNEY HOSPITAL	117	416
PIH HEALTH WHITTIER HOSPITAL	93	577
Unilab Corporation Clinical Laboratory · West Hills, CA	65	273
BARRETT, IVAN	50	227
Hung Nguyen Family Practice · Orange, CA	50	760
Reza Sharafi Internal Medicine · Downey, CA	44	516
TOTAL RENAL CARE INC	39	614
Alireza Jafari Cardiology · Whittier, CA	36	174
RENAL TREATMENT CENTERS CALIFORNIA INC	35	570
Zareh Ounjian Diagnostic Radiology · Whittier, CA	31	115
Yong Park Diagnostic Radiology · Whittier, CA	31	128

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