CATHY LYNN RIKER MD
NPI 1255448189
Internal Medicine - Rheumatology in Menlo Park, CA

Q: What is Cathy Riker's NPI number?

The NPI number for Cathy Riker is 1255448189. It was assigned to this individual provider in the NPPES registry on August 24, 2006.

Q: What is Cathy Riker's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Q: When was this NPI record last updated?

The NPPES record for Cathy Riker was last updated on April 16, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since August 24, 2006PECOS EnrolledAccepts Medicare Assignment

1300 CRANE ST, MENLO PARK, CA 94025(650) 498-6500 Get Directions Write a Review

NPPES record last updated: April 16, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Cathy Lynn Riker Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CATHY LYNN RIKER MD (NPI 1255448189) is an individual rheumatology provider in Menlo Park, California, licensed in California (G74920) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, maintains a secondary practice location in San Francisco, and is a graduate of Icahn School Of Medicine At Mount Sinai (1986).

NPPES Registry Identity

NPI1255448189

Entity TypeIndividualFemale

Primary Taxonomy207RR0500X

Provider Legal NameCATHY LYNN RIKERCredential: MD

Location Address1300 CRANE STMenlo Park, CA 94025-4260

Mailing Address1300 Crane StMenlo Park, CA 94025-4260 · (650) 498-6500

Phone(650) 498-6500

Sole ProprietorNo

Medical School CMSIcahn School Of Medicine At Mount SinaiGraduated 1986

Enumeration DateAugust 24, 2006

Last NPPES UpdateApril 16, 2024

NPPES CertifiedApril 16, 2024

✔ NPI 1255448189 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians

Taxonomy Code207RR0500X

License✔ Licensed in CA · G74920

Definition

An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.

Also ListedInternal MedicineTaxonomy 207R00000X · License G74920 (CA)

1300 CRANE ST, Menlo Park, CA 94025

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Secondary Practice Location 1

Location 1PO Box 60000, File #72484San Francisco, CA 94160-0001 · Phone (999) 999-9999

Other Identifiers 1

OtherMMM00087MNhic

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Cathy Lynn Riker Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1850456534

PECOS Enrollment IDI20090212000260

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Cathy Riker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Healthcare Alliance

9.0 mi

Internal Medicine

7999 GATEWAY BLVD STE 200
Newark, CA 94560

Reassigned Medicare billing, California enrollment
435 clinicians in this Medicare group

NPI 1760531198 (888) 924-1036

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

471 services170 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

114 services64 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

18 services18 patients

Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or G2212

This service refers to extended doctor visits where your healthcare provider spends additional time evaluating and managing your health beyond the primary procedure's required time. This includes each extra 15 minutes spent by the physician on the same day as the primary service.

14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94025 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$153.83 typical visit price

range $69.00 – $202.35

Typical copayment $38.45 (range $17.25 – $50.58)

Most-billed visit code 99204

Established Patient

$119.48 typical visit price

range $23.44 – $166.46

Typical copayment $29.87 (range $5.86 – $41.61)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. JODIE LYNN PORGES RR, CDE

Dietitian, Registered