Maria Isabel Bacay, MD
Patients across CA can see Maria Isabel Bacay, MD in person in Manteca or via virtual visit — no travel required. With 41+ years of experience, she has been practicing in the Manteca area. Among her Medicare patients, common conditions include hypertension, high cholesterol, and arthritis (per CMS data). CMS MIPS quality score: 82.95/100 (2023).
At a glance
- Prescribes opioids less than 42% of reporting doctors in California
- Uses generic medications more than 35% of reporting doctors in California
- Federal MIPS score higher than 49% of MIPS-scored doctors in California
- Virtual visits available — no app or travel required
Older · 6699dNPPES updated 2008-01-02 · verify on CMS
Contact & Location
Practice Location
1140 Norman Dr Suite 103, Manteca, CA 95336-5900
How Does This Doctor Compare?
Based on Medicare data, this doctor has an average quality score compared to other doctors in California, prescribes opioid pain medications conservatively, favors affordable generic drugs over brand-name ones.
MIPS Score
202382.95/100
California avg: 78.6 · US avg: 83.6
⚠ Lower than most doctors nationally(-0.6 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 = better1.66%
California avg: 5.2 · US avg: 5.1
✓ Higher than most doctors nationally(-3.4 pts)
Typical range among reporting doctors in California1.66% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Generic Rx
↑ Higher = better84.6%
California avg: 83.3 · US avg: 82.8
✓ Higher than most doctors nationally(+1.8 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
240
Unique beneficiaries
Standard volumePrescription Recipients
800
Patients prescribed
Prescriptions Written
12,000
Total claims
Total Medicare drug cost: $1.66M
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 (+5%) — 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 (+4%) — 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 (-3%) — less common here
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-7%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$1.3k received from industry
52 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 Maria Isabel Bacay's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
41 years in practice
Senior practitioner
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Taxonomy: 207R00000X
Primary hospital affiliation: Acute Care Hospitals
CMS Certification Number: 190183
View hospital on Medicare Care CompareVirtual Internal Medicine Care With Maria Isabel Bacay
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Maria Isabel Bacay for blood pressure monitoring, cholesterol management, arthritis follow-ups — no travel to Manteca 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 Maria Isabel Bacay
NPI records show Dr. Bacay as active with telehealth listed in Manteca, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (209) 825-6331.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Maria Isabel Bacay
Practice Location
1140 Norman Dr Suite 103, Manteca, CA 95336-5900
Mailing Address
1140 Norman Dr Suite 103, Manteca, CA 95336-5900
This is a provider directory. Contact the office directly to schedule appointments.
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