Benjamin Samuel Lopez, PA

  • Walnut Creek, CA
  • Physician assistant
NPI1881153187PAC ID2264843143
Medicare services, 2024
304
Medicare patients, 2024
213
Part D claims, 2024
154
MIPS score, 2024
97
Hospital affiliations
2
Practice address
1601 Ygnacio Valley Rd, Walnut Creek, CA 94598
Practice phone
Call (925) 939-3000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

John Muir Medical Center, Walnut Creek

Hospital · Walnut Creek, California

See all 6 affiliations

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Benjamin Samuel Lopez is a physician assistant in Walnut Creek, California

Benjamin Lopez practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health.

Benjamin Lopez's NPI, 1881153187, was assigned on March 16, 2019. Benjamin Lopez holds California license PA56556.

NPI and contact details
Medicare PAC ID
2264843143
NPI enumeration date
March 16, 2019
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(925) 939-3000
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
34
Medical school graduation
2018

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Benjamin Samuel Lopez practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California

Benjamin Lopez's primary practice is John Muir Medical Center, Walnut Creek, at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 in Contra Costa County. The practice phone is (925) 939-3000.

Source: Dmand AI Affiliation Data

Benjamin Samuel Lopez is affiliated with 2 sites of care and 4 medical groups

Benjamin Lopez's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. The medical group on file is Vituity. Dmand AI also links Benjamin Lopez to 1 more hospital and 3 medical groups, each named with a free account.

See all 6 affiliations for Benjamin Lopez

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Benjamin Samuel Lopez's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Benjamin Lopez practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
John Muir Medical Center, Walnut CreekAvailable with a free account
+1 more site and 3 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Benjamin Samuel Lopez is one of 11,482 physician assistants in California

Physician assistant is Benjamin Lopez's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Benjamin Lopez is licensed in California.

Specialties and state licenses

  • Physician assistant, CaliforniaPrimaryLicense PA56556 · taxonomy 363A00000X

Physician assistants near Benjamin Lopez

Counts of physician assistants with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Benjamin Samuel Lopez billed Medicare for 304 services in 2024

CMS data shows 304 Medicare services from Benjamin Lopez across 7 procedure codes in 2024, for 213 Medicare patients. Medicare paid $19,702 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024304
Medicare patients213
Paid by Medicare$19,702
Procedure codes7

Benjamin Lopez's Medicare services by type, 2024

  1. Office and hospital visits171
  2. Surgery122
  3. Tests and treatments11

Benjamin Lopez compared with the California median for physician assistants, 2024

  • Benjamin Lopez
  • California median
Medicare services
304vs 20449% above
Medicare patients
213vs 1052.0 times
Part D claims
39vs 24384% below

Medians across 7,065 physician assistants in California with Dmand AI profiles that report each measure.

Benjamin Lopez's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Benjamin Samuel Lopez treated 213 Medicare patients in 2024, average age 75

CMS counts 213 Medicare patients who saw Benjamin Lopez in 2024. The largest group is 75 to 84, with 81 patients. 75% of them have high blood pressure, and 73% have high cholesterol. 25% are also on Medicaid. Their average risk score is 1.77, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Benjamin Lopez's median patient age at 37, with 54% women.

Medicare patients, 2024213
Average age75
Average risk score1.77
Also on Medicaid25%

Benjamin Lopez's Medicare patients by age, 2024

Benjamin Lopez's Medicare patients by sex, 2024

  • Women11253%
  • Men10147%

Chronic conditions among Benjamin Lopez's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol73%
  3. Arthritis55%
  4. Chronic kidney disease35%
  5. Anxiety29%
  6. Diabetes29%
  7. Mood disorders28%
  8. Atrial fibrillation26%

Share of Medicare patients with each condition. A patient can have several.

Benjamin Lopez's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 37

Patient panel by sex, all payers

  • Women54%
  • Men45%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Benjamin Samuel Lopez wrote 154 Medicare Part D claims in 2024

In 2024, Benjamin Lopez wrote 154 Medicare Part D claims for 102 patients. 95% of them were for generic drugs. CMS names the drug for 39 of them, across 2 drugs with 11 or more claims each, at $228 in total drug cost.

Part D claims, 2024154
Drugs named by CMS2
Total drug cost$228
Part D patients102

Benjamin Lopez's Part D claims by kind of drug, 2024

  • Generic146 claims95%
  • Brand-name and other8 claims5%

Benjamin Lopez's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Benjamin Lopez's Part D claims, 2024

  • Opioids11%17 of 154 claims
  • Antibiotics30%46 of 154 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

See all prescribing by Benjamin Lopez

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Benjamin Samuel Lopez scored 97 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Benjamin Lopez for performance year 2024, reported as part of a group. Benjamin Lopez accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Benjamin Lopez's MIPS scores, performance year 2024

  • 97of 100Final score
  • 90of 100Quality
  • 40of 100Improvement Activities
  • 78of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Benjamin Samuel Lopez received $26 in industry payments in 2025

CMS Open Payments shows 1 general payment to Benjamin Lopez from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Solventum Corporation paid the most, $26.

Companies that paid Benjamin Lopez the most, 2025 to 2025

Share is of all general payments to this clinician.

See all payments to Benjamin Lopez

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Sources for Benjamin Samuel Lopez's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Benjamin Samuel Lopez

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Benjamin Samuel Lopez's NPI number?

Benjamin Samuel Lopez's NPI number is 1881153187. It was assigned on March 16, 2019, and it is active in the NPI Registry.

What does Benjamin Samuel Lopez specialize in?

Benjamin Samuel Lopez is a physician assistant in Walnut Creek, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).

Where does Benjamin Samuel Lopez practice?

Benjamin Lopez practices at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598. Benjamin Lopez's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dmand AI also links Benjamin Lopez to 1 hospital and 3 medical groups.

What is Benjamin Samuel Lopez's office phone number?

The practice phone on file for Benjamin Lopez is (925) 939-3000.

What is Benjamin Samuel Lopez's medical license number?

Benjamin Lopez holds California license PA56556.

Which hospitals is Benjamin Samuel Lopez affiliated with?

Benjamin Lopez practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California. Dmand AI links Benjamin Lopez to 1 more hospital.

What medical group is Benjamin Samuel Lopez part of?

Benjamin Lopez is linked to Vituity. Dmand AI links Benjamin Lopez to 3 more medical groups.

Does Benjamin Samuel Lopez accept Medicare?

Yes. CMS data shows Benjamin Lopez billed Medicare for 304 services in 2024, and Benjamin Lopez accepts Medicare assignment.

What is Benjamin Samuel Lopez's MIPS score?

Benjamin Lopez's MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.

How many Medicare patients does Benjamin Samuel Lopez see?

CMS counts 213 Medicare patients who saw Benjamin Lopez in 2024, with an average age of 75.

Show 4 more questionsShow fewer questions

What services does Benjamin Samuel Lopez bill to Medicare?

In 2024, Benjamin Lopez's most billed Medicare services were emergency department visit (99284), surgery: skin and soft tissue (11045) and surgery: skin and soft tissue (11042).

What drugs does Benjamin Samuel Lopez prescribe most?

In 2024 Medicare Part D data, Benjamin Lopez's most prescribed drugs by claims were Ondansetron ODT and Cephalexin.

Has Benjamin Samuel Lopez received payments from drug or device companies?

CMS Open Payments shows $26 in general payments to Benjamin Lopez from 1 company from 2025 to 2025. The largest total came from Solventum Corporation.

How long has Benjamin Samuel Lopez been practicing?

Benjamin Lopez graduated from medical school in 2018, 8 years ago.

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