Gregory Morris Giesler, MD
Cardiovascular Disease Internal Medicine
Gregory Morris Giesler is a Cardiovascular Disease Internal Medicine specialist based in Pasadena, CA with over 27 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Gregory Morris Giesler, MD has practiced internal medicine for 27+ years, working in group practice. He graduated from Chicago College of Medicine and Surgery in 1999 and has 27+ years of clinical experience. Among his Medicare patients, common conditions include hypertension, high cholesterol, and arthritis (per CMS data). CMS MIPS quality score: 92.21/100 (2023).
At a glance
- Uses generic medications more than 31% of reporting doctors in California
- Federal MIPS score higher than 78% of MIPS-scored doctors in California
- Virtual visits available — no app or travel required
Older · 5520dNPPES updated 2011-04-12 · verify NPI on CMS · Verify license at Medical Board of California
Contact & Location
Practice Location
55 E California Blvd 3rd Floor, Pasadena, CA 91105-3944
How Does This Doctor Compare?
Based on Medicare data, this doctor scores better than 78% of doctors in California on federal quality measures, favors affordable generic drugs over brand-name ones.
MIPS Score
202392.21/100
California avg: 78.6 · US avg: 83.6
✓ Higher than most doctors nationally(+8.6 pts)
Better than 78% of MIPS-scored doctors in CaliforniaHow the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Generic Rx
↑ Higher = better83.1%
California avg: 83.3 · US avg: 82.8
✓ Higher than most doctors nationally(+0.3 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
1,849
Unique beneficiaries
High volumePrescription Recipients
806
Patients prescribed
Prescriptions Written
7,793
Total claims
Total Medicare drug cost: $1.82M
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 Hypertension, High Cholesterol, and Arthritis.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
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 (+3%) — a focus area for this doctor
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↑ More patients than average (+14%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↑ More patients than average (+5%) — a focus area for this doctor
An irregular, often rapid heartbeat that increases the risk of stroke
US avg: 22%↑ More patients than average (+11%) — a focus area for this doctor
The heart cannot pump blood efficiently enough to meet the body's needs
US avg: 22.5%↑ More patients than average (+4%) — 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
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$3.1k received from industry
133 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 Gregory Morris Giesler's NPI.
Social Vulnerability Index: 0.58 / 1.00
Moderate vulnerabilityHe practices in a community where the CDC measures social vulnerability across socioeconomic status, household composition, racial/ethnic minority status, and housing/transportation factors. A higher index indicates more residents may face barriers accessing care.
Source: CDC/ATSDR Social Vulnerability Index.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1999
Chicago College of Medicine and Surgery
27 years in practice
Experienced
Cardiologists specialize in diagnosing and treating heart and blood vessel conditions including coronary artery disease, heart failure, arrhythmias, valve disorders, and hypertension. They perform diagnostic procedures such as echocardiograms, stress tests, and cardiac catheterization.
Taxonomy: 207RC0000X
Education & Training
Chicago College of Medicine and Surgery (Class of 1999)
Primary hospital affiliation: Critical Access Hospitals
CMS Certification Number: 191317
View hospital on Medicare Care CompareVirtual Cardiovascular Disease Care With Gregory Morris Giesler
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Gregory Morris Giesler for blood pressure monitoring, cholesterol management, arthritis follow-ups — no travel to Pasadena 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 Gregory Morris Giesler
NPI records show Dr. Giesler as active with telehealth listed in Pasadena, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (626) 793-1227.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator · CDC SVI. See Data Methodology.
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Contact Gregory Morris Giesler
Practice Location
55 E California Blvd 3rd Floor, Pasadena, CA 91105-3944
Mailing Address
55 E California Blvd 3rd Floor, Pasadena, CA 91105-3944
This is a provider directory. Contact the office directly to schedule appointments.
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