PROVIDER PROFILE · NPI 1255448189

Cathy RikerMD

RheumatologyMenlo Park, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

372

Unique beneficiaries

—

Total services

804

Distinct HCPCS

Medicare payment

$99K

Peer benchmark

Total Medicare services vs. 530 Rheumatology providers in CA — below median (cohort median 1,833).

PRESCRIBING · PART D · 2024

Total Rx claims

982

Beneficiaries

—

Total drug cost

$1.7M

Distinct drugs

Brand share

30.1%

Top prescribed drugs

Prednisone203 claims

Hydroxychloroquine Sulfate172 claims

Methotrexate Sodium98 claims

Allopurinol76 claims

Alendronate Sodium41 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$110

Payment records

By payment type

Food and Beverage$110

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 050441

Hospital

REFERRAL NETWORK

Where Cathy Riker'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 · 20 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Roberta Wong Diagnostic Radiology · Menlo Park, CA	60	213
WEXLER, LEWIS	41	179
Donna Lee Ophthalmology · Menlo Park, CA	27	60
SELLING, JOHN	21	107
Paul Yun Otolaryngology · Menlo Park, CA	15	47
TRAVER-SELLING, KELLY	14	44
CRESCENDO BIOSCIENCE, INC	13	19
Kathryn Stevens Diagnostic Radiology · Stanford, CA	11	25

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
STANFORD HEALTH CARE	189	1,735
Roberta Wong Diagnostic Radiology · Menlo Park, CA	52	134
Jeffrey Guardino Cardiology · Menlo Park, CA	25	68
Seema Sinha Cardiology · Menlo Park, CA	22	107
Donna Lee Ophthalmology · Menlo Park, CA	22	64
Peter Sklarin Internal Medicine · Menlo Park, CA	20	57
TRAVER-SELLING, KELLY	19	68
SELLING, JOHN	18	107
Unilab Corporation Clinical Laboratory · San Jose, CA	18	68
CRESCENDO BIOSCIENCE, INC	16	36
WEXLER, LEWIS	15	27
Joellen Vanzander Dermatology · Menlo Park, CA	13	32

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