Mark L Geller, M.D.
Endocrinology, Diabetes & Metabolism
Mark L Geller is an Endocrinology, Diabetes & Metabolism specialist based in Tarzana, CA with over 41 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Patients across CA can see Mark L Geller, M.D. in person in Tarzana or via virtual visit — no travel required. Trained at University of California, San Diego School of Medicine (class of 1985), he has been practicing for over 41 years. Among his Medicare patients, common conditions include high cholesterol, hypertension, and arthritis (per CMS data).
At a glance
- Prescribes opioids less than 49% of reporting doctors in California
- Uses generic medications more than 28% of reporting doctors in California
- Virtual visits available — no app or travel required
Older · 2770dNPPES updated 2018-10-23 · verify NPI on CMS · Verify license at Medical Board of California
Contact & Location
Practice Location
18133 Ventura Blvd Suite 204, Tarzana, CA 91356-3641
How Does This Doctor Compare?
Based on Medicare data, this doctor prescribes opioid pain medications conservatively, favors affordable generic drugs over brand-name ones.
Opioid Rx
↓ Lower = better1.02%
California avg: 5.2 · US avg: 5.1
✓ Higher than most doctors nationally(-4.1 pts)
Typical range among reporting doctors in California1.02% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Generic Rx
↑ Higher = better81.8%
California avg: 83.3 · US avg: 82.8
⚠ Lower than most doctors nationally(-1 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
345
Unique beneficiaries
Standard volumePrescription Recipients
472
Patients prescribed
Prescriptions Written
4,511
Total claims
Total Medicare drug cost: $824k
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, Hypertension, and Arthritis.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — 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 (-2%) — less common here
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↑ More patients than average (+1%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-1%) — less common here
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-3%) — 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 (-8%) — less common here
Weakened bones that are more prone to fractures, common in older adults
US avg: 18.1%↑ More patients than average (+4%) — a focus area for this doctor
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$1.5k received from industry
90 transactions reported in 2018 ·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 2018, attributed to Mark L Geller's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1985
University of California, San Diego School of Medicine
41 years in practice
Senior practitioner
Endocrinologists treat hormonal and metabolic disorders including diabetes (type 1 and 2), thyroid disease, osteoporosis, adrenal disorders, pituitary conditions, and polycystic ovary syndrome (PCOS).
Taxonomy: 207RE0101X
Education & Training
University of California, San Diego School of Medicine (Class of 1985)
Mailing address
Po Box 9602, Mission Hills, CA 91346-9602
Differs from practice location
Virtual Endocrinology, Diabetes & Metabolism Care With Mark L Geller
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Mark L Geller for cholesterol management, blood pressure monitoring, arthritis follow-ups — no travel to Tarzana 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 Mark L Geller
Dr. Geller is listed as active in the NPI registry with telehealth listed in Tarzana, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (818) 466-7700.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2018 · CMS Physician Comparator. See Data Methodology.
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Contact Mark L Geller
Practice Location
18133 Ventura Blvd Suite 204, Tarzana, CA 91356-3641
Mailing Address
Po Box 9602, Mission Hills, CA 91346-9602
This is a provider directory. Contact the office directly to schedule appointments.
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