Cathy Lynn Riker, MD
Rheumatology Internal Medicine
Also practices: INTERNAL MEDICINE
With over 40 years in internal medicine, Cathy Lynn Riker, MD is a long-established rheumatologist in Menlo Park. Trained at Icahn School of Medicine at Mount Sinai (class of 1986), she has been practicing for over 40 years. CMS Medicare data shows her patients commonly have high cholesterol, arthritis, and hypertension.
Older · 750dNPPES updated 2024-04-16 · verify on CMS
How Does This Doctor Compare?
Generic Rx
↑ Higher = better74.5%
California avg: 83.3 · US avg: 82.8
⚠ Lower than most doctors nationally(-8.3 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
202
Unique beneficiaries
Standard volumePrescription Recipients
154
Patients prescribed
Prescriptions Written
1,116
Total claims
Total Medicare drug cost: $1.72M
Percentile rankings compared against 9,360 reporting peers in California.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages High Cholesterol, Arthritis, and Hypertension.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↑ More patients than average (+26%) — a focus area for this doctor
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-7%) — less common here
Weakened bones that are more prone to fractures, common in older adults
US avg: 18.1%↑ More patients than average (+36%) — a focus area for this doctor
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-4%) — less common here
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-14%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$110 received from industry
5 transactions reported in 2024 ·Low tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Cathy Lynn Riker's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1986
Icahn School of Medicine at Mount Sinai
Board certified · Apr 15, 2024
CMS-verified certification date
40 years in practice
Senior practitioner
Rheumatologists treat autoimmune and inflammatory conditions including rheumatoid arthritis, lupus, psoriatic arthritis, gout, osteoarthritis, and vasculitis. They manage biologic therapies and joint-preserving treatments.
Taxonomy: 207RR0500X
Education & Training
Icahn School of Medicine at Mount Sinai (Class of 1986)
Primary hospital affiliation: Acute Care Hospitals
CMS Certification Number: 200034
View hospital on Medicare Care CompareVirtual Internal Medicine Care With Cathy Lynn Riker
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Cathy Lynn Riker for cholesterol management, arthritis follow-ups, blood pressure monitoring — no travel to Menlo Park required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Cathy Lynn Riker
Dr. Riker is listed as active in the NPI registry with telehealth listed in Menlo Park, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (650) 498-6500.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.
Contact Cathy Lynn Riker
Practice Location
1300 Crane St, Menlo Park, CA 94025-4260
Mailing Address
1300 Crane St, Menlo Park, CA 94025-4260
This is a provider directory. Contact the office directly to schedule appointments.
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