Karen Callen, M.D.
Karen Callen, M.D. has practiced specialist for 42+ years, working in group practice. Trained at Tulane University School of Medicine (class of 1984), she has been practicing for over 42 years. Among her Medicare patients, common conditions include high cholesterol, hypertension, and arthritis (per CMS data).
Older · 2443dNPPES updated 2019-08-27 · verify on CMS
Contact & Location
Practice Location
1725 Montgomery St Suite 200, San Francisco, CA 94111-1030
How Does This Doctor Compare?
Generic Rx
↑ Higher = better74%
California avg: 83.3 · US avg: 82.8
⚠ Lower than most doctors nationally(-8.8 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
97
Unique beneficiaries
Standard volumePrescription Recipients
97
Patients prescribed
Prescriptions Written
350
Total claims
Total Medicare drug cost: $52k
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%↓ Fewer patients than average (-6%) — less common here
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-24%) — less common here
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-13%) — 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.
$507 received from industry
20 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 Karen Callen's NPI.
Patient Reviews
No patient reviews yet. If you've seen Karen Callen, 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.
Graduated medical school · 1984
Tulane University School of Medicine
42 years in practice
Senior practitioner
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
Taxonomy: 174400000X
Education & Training
Tulane University School of Medicine (Class of 1984)
Primary hospital affiliation: Acute Care Hospitals
CMS Certification Number: 190034
View hospital on Medicare Care CompareVirtual Specialist Care With Karen Callen
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Karen Callen for cholesterol management, blood pressure monitoring, arthritis follow-ups — no travel to San Francisco 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 Karen Callen
Dr. Callen is listed as active in the NPI registry with telehealth listed in San Francisco, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (415) 831-2180.
Sourced from CMS NPPES · OIG LEIE · 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 Karen Callen
Practice Location
1725 Montgomery St Suite 200, San Francisco, CA 94111-1030
Mailing Address
1725 Montgomery St Suite 200, San Francisco, CA 94111-1030
This is a provider directory. Contact the office directly to schedule appointments.
Related Providers