Amicus Arthritis & Osteoporosis Center

What Amicus Arthritis & Osteoporosis Center does

Amicus Arthritis & Osteoporosis Center (AAOC) is an independent, physician-owned rheumatology practice headquartered in Whittier, California, founded circa 2016 by Dr. Tien-I Karleen Su to deliver specialty care to patients in Southeast Los Angeles. The practice employed four board-certified rheumatologists and two board-certified physician assistants as of the input period, serving a 15–25 mile radius that includes East LA, Pasadena, Downey, Norwalk, Montebello, Pico Rivera, Commerce, the San Gabriel Valley, and Long Beach.

The core offering is comprehensive rheumatology care across the disease spectrum — rheumatoid arthritis, lupus and other autoimmune diseases, osteoporosis, osteoarthritis, gout, fibromyalgia, and vasculitis — delivered by board-certified rheumatologists including USC-affiliated faculty. Diagnostic and treatment infrastructure is concentrated on-site: dual-energy X-ray absorptiometry (DEXA) bone density scanning with same-day T-score interpretation, an in-house infusion center for biologic medications (rituximab, abatacept, zoledronic acid/Reclast) and refractory gout, joint aspiration and injection therapy, and an active clinical trials program providing access to investigational therapies for treatment-resistant patients. A secure patient portal supports messaging, visit summaries, and bill payment.

The business model is a fee-for-service independent medical practice billing Medicare, national PPO plans, and many HMO/IPA plans, with copays, co-insurance, and deductibles collected at time of service. Revenue streams include rheumatology consultations, diagnostic testing (DEXA), and ongoing disease management; in-office infusion therapy; and clinical trial participation. Patient acquisition is driven by primary care physician referrals (especially for HMO plans), local SEO, practice website engagement, community word-of-mouth among the substantial Spanish-speaking population, and in-network insurance participation. The practice is differentiated by shorter wait times versus hospital systems (weeks versus 3–4 months), multilingual staff, and an independent non-hospital-affiliated cost structure.

Name

Amicus Arthritis & Osteoporosis Center

Legal name

Amicus Arthritis & Osteoporosis Center

Website

https://amicusarthritis.com

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

11–50 employees

Short description

Amicus Arthritis & Osteoporosis Center is an independent, physician-owned rheumatology practice in Whittier, CA, serving Southeast Los Angeles with board-certified rheumatologists providing on-site DEXA bone density scanning, in-house infusion therapy, and clinical trials access for arthritis, osteoporosis, gout, and autoimmune patients.

Ownership category

akta.pro rank

Product category

Specialty Rheumatology Practice

NAICS

Offices of Physicians (62111), Offices of Other Health Practitioners (6213)

SIC

Services-Offices & Clinics Of Doctors Of Medicine (8011), Services-Specialty Outpatient Facilities, Nec (8093)

akta.pro primary industry

Chronic Disease Management & Remote Patient Monitoring (RPM) (HSABACAD)

Keywords

• Rheumatology medical care
• Bone density scanning
• Autoimmune disease treatment
• Infusion therapy services
• Arthritis specialist care

Headquarters

HQ city

Whittier

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Patient Consultation and Treatment Services: Medical practice revenue from rheumatology consultations, diagnostic testing (DEXA scans), and ongoing treatment management for arthritis, autoimmune diseases, osteoporosis, and related conditions
2. Infusion Therapy Services: Revenue from in-office biologic IV infusions for conditions such as refractory gout, with monitoring by clinical staff
3. Clinical Trial Participation: Revenue from active clinical trials for rheumatoid arthritis and osteoarthritis, providing access to investigational therapies

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Amicus Arthritis & Osteoporosis Center is an independent rheumatology practice providing board-certified specialty care for arthritis, autoimmune diseases, and osteoporosis. Core services include rheumatology consultations, on-site DEXA bone density scanning, biologic and IV infusion therapy, joint injections, and access to clinical trials for emerging therapies. All services are delivered at a single Whittier, CA clinic with bilingual English/Spanish staff and a secure online patient portal.

Product overview

Amicus Arthritis & Osteoporosis Center is an independent rheumatology practice offering a comprehensive portfolio of services centered on board-certified rheumatologist consultations and specialized condition treatments. The core offering consists of Rheumatoid Arthritis Treatment, Osteoporosis Diagnosis & Treatment (including on-site DEXA scanning), Gout Treatment, and Fibromyalgia Care, supported by Infusion Therapy services administered in-office. The practice differentiates through integrated diagnostic capabilities (DEXA scanning), access to Clinical Trials for emerging therapies, and a Patient Portal for secure health information access. All services are delivered at a single location in Whittier, CA, with bilingual (English/Spanish) staff.

Differentiator

Problem solved

Functional benefit

Products and services

• Rheumatology Consultations Diagnosis and long-term management of autoimmune and musculoskeletal conditions by board-certified rheumatologists, covering rheumatoid arthritis, lupus, osteoarthritis, gout, fibromyalgia, vasculitis, and other rheumatic diseases.
• Rheumatoid Arthritis Treatment Comprehensive RA care including DMARDs (methotrexate, hydroxychloroquine, sulfasalazine), biologics (TNF blockers, IL-6 blockers, JAK inhibitors), infusion therapy, joint injections, and clinical trial access.
• Osteoporosis Diagnosis & Treatment On-site DEXA bone density scanning, T-score interpretation, FRAX fracture-risk assessment, and comprehensive treatment with bisphosphonates, denosumab (Prolia), and bone-building agents (Evenity, Forteo, Tymlos).
• Gout Treatment Acute flare management with anti-inflammatories, colchicine, and steroids; joint aspiration for crystal analysis; urate-lowering therapy (allopurinol, febuxostat); and in-house infusion therapy for refractory gout.
• Fibromyalgia Care Comprehensive fibromyalgia diagnosis and management including medication (duloxetine, milnacipran, pregabalin), sleep optimization, graded exercise therapy, and cognitive behavioral therapy referrals.
• Infusion Therapy In-office biologic and IV infusion therapy including rituximab, abatacept, and zoledronic acid (Reclast), administered in a comfortable infusion center by staff familiar with patient history.
• Clinical Trials Access to carefully selected clinical trials for emerging rheumatological therapies, particularly for rheumatoid arthritis and osteoarthritis patients who have not responded to standard treatments.
• Patient Portal Secure online portal for patients to view health information, test results, appointment dates, previous visit summaries, and securely message the provider team, with online bill pay functionality.
• DEXA Bone Density Scanning On-site dual-energy X-ray absorptiometry scanning for bone density measurement, with same-day T-score results and immediate treatment planning.

Quantifiable outcome

• Most patients on appropriate medication reach remission with controlled inflammation, stopped joint damage, and restored quality of life
• +1 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Cleveland Clinic: Major academic rheumatology program offering comprehensive arthritis, autoimmune, and osteoporosis care including infusion services and clinical research. Comparable specialty portfolio and reputation as a tertiary rheumatology referral destination.
• UCSF Health: Northern California academic rheumatology program covering the same disease spectrum with research and infusion capabilities. Comparable specialty scope and academic-grade clinical trial access.
• Mayo Clinic: National academic referral center with a renowned rheumatology department offering diagnostics, biologic infusions, and clinical trials across the same disease spectrum (RA, lupus, vasculitis, osteoporosis). Sets the standard for complex rheumatology care that Amicus's trial program partly emulates.
• UC San Diego Health: Southern California academic rheumatology service providing specialty care, biologic infusions, and clinical trials for arthritis, lupus, and osteoporosis patients. Competes for California referrals and physician talent.
• Keck Medicine of USC: USC-affiliated academic medical center where Amicus's Dr. Gelfand holds a Clinical Professor appointment and runs the rheumatology service at affiliated Rancho Los Amigos. Directly overlaps in specialty coverage for the same Southeast LA catchment.
• Stanford Health Care: California-based academic medical center with a comprehensive rheumatology division serving autoimmune, inflammatory, and metabolic bone disease. Geographic complement within California and a likely referral target for complex cases from independent practices.
• Cedars-Sinai Medical Center: Major Los Angeles academic medical center with a rheumatology division offering diagnostics, biologic therapy, and clinical trials. Operates broadly in the same specialty and competes for Southeast LA patients who might otherwise be referred from Amicus's PCP network.
• Hospital for Special Surgery (HSS): National specialty hospital focused on musculoskeletal and rheumatologic care with deep expertise in inflammatory arthritis, biologic therapy, and osteoporosis. Closest pure-specialty academic analog to Amicus's clinical focus.
• UCLA Health: UCLA's rheumatology program is specifically referenced in Amicus patient testimonials as the prior provider for cases that transitioned due to long wait times. Comparable specialty offering (RA, lupus, osteoporosis, infusion) at much larger institutional scale.

Others

• U.S. Anesthesia Partners: PE-backed single-specialty physician practice platform; not a direct competitor but illustrates the consolidated specialty-practice business model Amicus could pursue if it sought external capital and growth via satellite expansion or acquisitions.

Market position

Strengths1 record

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Amicus Arthritis & Osteoporosis Center