Masami Hattori, M.D.
Also practices: PAIN MANAGEMENT
Patients across CA can see Masami Hattori, M.D. in person in San Francisco or via virtual visit — no travel required. A University of California, San Francisco School of Medicine graduate since 1995, he brings 31+ years of experience. He regularly sees Medicare patients with arthritis, hypertension, and high cholesterol (per CMS claims data).
At a glance
- Uses generic medications more than 74% of reporting doctors in California
- Virtual visits available — no app or travel required
Older · 160dNPPES updated 2025-11-27 · verify on CMS
Contact & Location
Practice Location
1 Shrader St Ste 600, San Francisco, CA 94117-1018
How Does This Doctor Compare?
Based on Medicare data, this doctor favors affordable generic drugs over brand-name ones.
MIPS Score
202372/100
California avg: 78.6 · US avg: 83.6
⚠ Lower than most doctors nationally(-11.6 pts)
How the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Opioid Rx
↓ Lower = better55.97%
California avg: 5.2 · US avg: 5.1
⚠ Lower than most doctors nationally(+50.9 pts)
55.97% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Generic Rx
↑ Higher = better91.3%
California avg: 83.3 · US avg: 82.8
✓ Higher than most doctors nationally(+8.5 pts)
Better than 74% of reporting doctors in CaliforniaHow often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
306
Unique beneficiaries
Standard volumePrescription Recipients
388
Patients prescribed
Prescriptions Written
2,446
Total claims
Total Medicare drug cost: $232k
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 Arthritis, Hypertension, and High Cholesterol.
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 (+3%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↓ Fewer patients than average (-1%) — 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%↑ More patients than average (+2%) — a focus area for this doctor
Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-8%) — less common here
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-10%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$254 received from industry
11 transactions reported in 2024 ·Low 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 Masami Hattori's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1995
University of California, San Francisco School of Medicine
Board certified · Nov 26, 2025
CMS-verified certification date
31 years in practice
Senior practitioner
Pain Medicine is a primary medical specialty based on a distinct body of knowledge and a well-defined scope of clinical practice that is founded on science, research and education. It is concerned with the study of pain, the prevention of pain, and the evaluation, treatment, and rehabilitation of persons in pain. A comprehensive evaluation incorporates the physical, psychological, cognitive and socio-cultural contributions to pain. The treatment protocol may include pharmacological, invasive, behavioral, cognitive, rehabilitative and complementary strategies provided in a concurrent focused and patient specific manner. The pain medicine physician often serves the patient as a frontline physician regarding their pain, but also may serve as a consultant to other physicians, direct an interdisciplinary/multidisciplinary treatment team, conduct research, or advocate for the patient's pain care with public and private agencies. The Pain Medicine physician may work in variety of settings including office, clinic, hospital, university, or governmental/public agencies.
Taxonomy: 208VP0000X
Education & Training
University of California, San Francisco School of Medicine (Class of 1995)
Primary hospital affiliation: Psychiatric
CMS Certification Number: 184015
View hospital on Medicare Care CompareVirtual Pain Medicine Care With Masami Hattori
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Masami Hattori for arthritis follow-ups, blood pressure monitoring, cholesterol management — 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 Masami Hattori
Dr. Hattori 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) 292-9756.
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 Masami Hattori
Practice Location
1 Shrader St Ste 600, San Francisco, CA 94117-1018
Mailing Address
1 Shrader St Ste 600, San Francisco, CA 94117-1018
This is a provider directory. Contact the office directly to schedule appointments.
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