Zachary Thomas Fellows, M.D.
Rheumatology Internal Medicine
Zachary Thomas Fellows is a Rheumatology Internal Medicine specialist based in Carlsbad, CA with over 12 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Zachary Thomas Fellows, M.D. practices as part of a group rheumatologist practice in Carlsbad, CA. He has been in practice for 12+ years. He regularly sees Medicare patients with high cholesterol, arthritis, and hypertension (per CMS claims data). CMS MIPS quality score: 80.73/100 (2023).
At a glance
- Federal MIPS score higher than 47% of MIPS-scored doctors in California
- Virtual visits available — no app or travel required
Older · 125dNPPES updated 2026-01-18 · verify NPI on CMS · Verify license at Medical Board of California
Contact & Location
Practice Location
6120 Paseo Del Norte Ste L2, Carlsbad, CA 92011-1149
How Does This Doctor Compare?
Based on Medicare data, this doctor has an average quality score compared to other doctors in California.
MIPS Score
202380.73/100
California avg: 78.6 · US avg: 83.6
⚠ Lower than most doctors nationally(-2.9 pts)
Average range among MIPS-scored doctors in CaliforniaHow the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Opioid Rx
↓ Lower = better9.02%
California avg: 5.2 · US avg: 5.1
⚠ Lower than most doctors nationally(+3.9 pts)
9.02% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Medicare Patients
348
Unique beneficiaries
Standard volumePrescription Recipients
304
Patients prescribed
Prescriptions Written
1,763
Total claims
Total Medicare drug cost: $947k
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%↑ More patients than average (+2%) — a focus area for this doctor
Weakened bones that are more prone to fractures, common in older adults
US avg: 18.1%↑ More patients than average (+14%) — a focus area for this doctor
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↓ Fewer patients than average (-6%) — less common here
Conditions affecting emotional state, including depression and bipolar disorder
A mood disorder causing persistent sadness and loss of interest in activities
US avg: 31.8%↓ Fewer patients than average (-9%) — less common here
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-10%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$3.6k received from industry
68 transactions reported in 2024 ·Moderate 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 Zachary Thomas Fellows's NPI.
Patient Reviews
No patient reviews yet. If you've seen Zachary Thomas Fellows, your feedback helps other patients.
Review PolicyAll feedback is moderated before publishing. We verify reviewer identity where possible and enforce a one-review-per-provider policy. Full guidelines →
Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Board certified · Jan 17, 2026
Self-reported via NPPES
12 years in practice
Established
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
Virtual Internal Medicine Care With Zachary Thomas Fellows
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Zachary Thomas Fellows for cholesterol management, arthritis follow-ups, blood pressure monitoring — no travel to Carlsbad 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 Zachary Thomas Fellows
NPI records show Dr. Fellows as active with telehealth listed in Carlsbad, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (760) 891-4687.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
Is this your profile?
Verify credentials, update practice details, and manage telehealth.
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 Zachary Thomas Fellows
Practice Location
6120 Paseo Del Norte Ste L2, Carlsbad, CA 92011-1149
Mailing Address
6120 Paseo Del Norte Ste L2, Carlsbad, CA 92011-1149
This is a provider directory. Contact the office directly to schedule appointments.
Related Providers
Rheumatology Internal Medicine in California
See allGerson Charles Bernhard, MD
San Francisco, CA
John P. Kane, MD
San Francisco, CA
Yzhar Charuzi, M.D
Los Angeles, CA