Dr. Michael Benjamin Brewer, MD

  • Bellflower, CA
  • Vascular surgeon
NPI1023133972PAC ID3476774852
Medicare services, 2019
12
Medicare patients, 2024
22
Part D claims, 2024
223
Publications
14
Hospital affiliations
1
Practice address
9400 Rosecrans Avenue, Bellflower, CA 90706
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD

Acute Care Hospital outpatient department · Bellflower, California

See all 5 affiliations

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Dr. Michael Benjamin Brewer is a vascular surgeon in Bellflower, California

Dr. Brewer practices at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California.

Dr. Brewer's NPI, 1023133972, was assigned on March 20, 2007. Dr. Brewer graduated from UC Irvine School of Medicine in 2006. Dr. Brewer's California license number on file is A119134.

NPI and contact details
Medicare PAC ID
3476774852
NPI enumeration date
March 20, 2007
NPI status
Active
Accepts Medicare assignment
Yes
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
46
Medical school graduation
2006

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

Dr. Michael Benjamin Brewer practices at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California

Dr. Brewer's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD, at 9400 Rosecrans Avenue, Bellflower, CA 90706.

  • Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD
    9400 Rosecrans Avenue, Bellflower, CA 90706

Source: Dmand AI Affiliation Data

Dr. Michael Benjamin Brewer is affiliated with 4 sites of care and 1 medical group

Dr. Brewer's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California. Dr. Brewer is also affiliated with Downey Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Brewer to 1 more breast imaging center and 1 group practice or clinic, each named with a free account. Dr. Brewer's employer is on file too: a hospital.

See all 5 affiliations for Dr. Brewer

Source: Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Michael Benjamin Brewer's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Brewer practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Kaiser Permanente Medical Group Bellflower Medical Offices - HOPDAvailable with a free account
+3 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Michael Benjamin Brewer is one of 532 vascular surgeons in California

Vascular surgery is Dr. Brewer's primary specialty in the NPI Registry, under taxonomy code 2086S0129X. Dr. Brewer is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Brewer's licenses on file in 2 states: California and Maryland.

Specialties and state licenses

  • Vascular surgery, CaliforniaPrimaryLicense A119134 · 2011 to 2025 · taxonomy 2086S0129X
  • Maryland license2008 to 2010

Vascular surgeons near Dr. Brewer

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

532vascular surgeons in California
6vascular surgeons in Bellflower

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

Dr. Michael Benjamin Brewer billed Medicare for 12 services in 2019

CMS data shows 12 Medicare services from Dr. Brewer across 1 procedure code in 2019, all of them office visits, for 22 Medicare patients. Medicare paid $539 for them. Every service was in an office.

Medicare services, 201912
Medicare patients22
Paid by Medicare$539
Procedure codes1

Dr. Brewer compared with the California median for vascular surgeons, 2019

  • Dr. Brewer
  • California median
Medicare services
12vs 60998% below
Medicare patients
22vs 27292% below
Part D claims
191vs 553.5 times

Medians across 499 vascular surgeons in California with Dmand AI profiles that report each measure.

Dr. Brewer's most billed Medicare procedure codes, 2019

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

See all procedures by Dr. Brewer

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

Dr. Michael Benjamin Brewer treated 22 Medicare patients in 2024, average age 63

CMS counts 22 Medicare patients who saw Dr. Brewer in 2024. 75% of them have chronic kidney disease, and 75% have diabetes. Their average risk score is 5.06, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Brewer's median patient age at 69, with 61% women.

Medicare patients, 202422
Average age63
Average risk score5.06

Chronic conditions among Dr. Brewer's Medicare patients, 2024

  1. Chronic kidney disease75%
  2. Diabetes75%
  3. High blood pressure75%
  4. High cholesterol75%

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

Dr. Brewer's patients across all payers

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

Patient panel by age, all payers

Median age 69

Patient panel by sex, all payers

  • Women61%
  • Men40%

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

Dr. Michael Benjamin Brewer wrote 223 Medicare Part D claims in 2024

In 2024, Dr. Brewer wrote 223 Medicare Part D claims for 92 patients. 96% of them were for generic drugs. CMS names the drug for 191 of them, across 5 drugs with 11 or more claims each, at $5,863 in total drug cost. In 2023, CMS named 168 claims across 3 drugs.

Part D claims, 2024223
Drugs named by CMS5
Total drug cost$5,863
Part D patients92

Dr. Brewer's Part D claims by kind of drug, 2024

  • Generic215 claims96%
  • Brand-name and other8 claims4%

Dr. Brewer'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 Dr. Brewer's Part D claims, 2024

  • Opioids25%56 of 223 claims

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

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1682024: 19114%

Drugs named by CMS: 5 in 2024, 3 in 2023.

See all prescribing by Dr. Brewer

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

How Dr. Michael Benjamin Brewer takes part in Medicare

Dr. Brewer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Michael Benjamin Brewer has 14 publications on record

Dmand AI links 14 papers to Dr. Brewer, published from 2009 to 2024. 2024 was the busiest year, with 3. The most frequent topics are Computed Tomography Angiography, Embolization, Therapeutic and Endarterectomy, Carotid. Dr. Brewer has published most often in Vasc Endovascular Surg. Dr. Brewer's most frequent co-authors are David L-C Lau, MD, Devinder Singh, MD and Matthew K. Folstein, MD.

Papers14
Years published2009 to 2024

Dr. Brewer's papers by year, 2009 to 2024

Topics Dr. Brewer writes about most

  • Computed Tomography Angiography
  • Embolization, Therapeutic
  • Endarterectomy, Carotid
  • Endovascular Procedures
  • Lymphedema
  • Obesity, Morbid
  • Tinnitus

Dr. Brewer's most frequent co-authors

Recent publications by Dr. Brewer

See all 14 publications and co-authors

See who Dr. Brewer researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Brewer works with, so you can find a warm path to the right vascular surgeons.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Michael Benjamin Brewer received $5,561 in industry payments from 2017 to 2025

CMS Open Payments shows 101 general payments to Dr. Brewer from 12 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 76% of the total. Medtronic, Inc. paid the most, $1,872.

General payments to Dr. Brewer by program year, 2017 to 2025

General payments to Dr. Brewer by kind, 2017 to 2025

$5.6Kin total
  • Food and beverage$4,20976%
  • Travel and lodging$1,35224%

Companies that paid Dr. Brewer the most, 2017 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Brewer

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

Dr. Michael Benjamin Brewer graduated from UC Irvine School of Medicine

Dr. Brewer graduated from UC Irvine School of Medicine in 2006.

  1. Medical schoolUC Irvine School of Medicine
  2. Board certified in surgeryAmerican Board of Surgery
  3. Board certified in vascular surgeryAmerican Board of Surgery

Source: Dmand AI Professional Profile Data

Dr. Michael Benjamin Brewer accepts plans from 1 insurance carrier

Dr. Brewer is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.

  • CMS Medicare

Source: Dmand AI Insurance Network Data

Sources for Dr. Michael Benjamin Brewer'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 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)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
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 Dr. Michael Benjamin Brewer

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

What is Dr. Michael Benjamin Brewer's NPI number?

Dr. Michael Benjamin Brewer's NPI number is 1023133972. It was assigned on March 20, 2007, and it is active in the NPI Registry.

What kind of doctor is Dr. Michael Benjamin Brewer?

Dr. Michael Benjamin Brewer is a vascular surgeon in Bellflower, California. The primary specialty in the NPI Registry is Vascular Surgery Physician (taxonomy code 2086S0129X).

Where does Dr. Michael Benjamin Brewer practice?

Dr. Brewer practices at 9400 Rosecrans Avenue, Bellflower, CA 90706. Dr. Brewer's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California. Dmand AI also links Dr. Brewer to 1 breast imaging center and 1 group practice or clinic.

What is Dr. Michael Benjamin Brewer's medical license number?

Dr. Brewer's California license number on file is A119134, one of the licenses on file in 2 states.

Which states has Dr. Michael Benjamin Brewer been licensed in?

Dmand AI has state licenses on file for Dr. Brewer in California (2011 to 2025) and Maryland (2008 to 2010).

Which hospitals is Dr. Michael Benjamin Brewer affiliated with?

Dr. Brewer is affiliated with Downey Medical Center.

What medical group is Dr. Michael Benjamin Brewer part of?

Dr. Brewer is linked to Southern California Permanente Medical Group.

Does Dr. Michael Benjamin Brewer accept Medicare?

Yes. CMS data shows Dr. Brewer billed Medicare for 12 services in 2019, and Dr. Brewer accepts Medicare assignment.

How many Medicare patients does Dr. Michael Benjamin Brewer see?

CMS counts 22 Medicare patients who saw Dr. Brewer in 2024, with an average age of 63.

Is Dr. Michael Benjamin Brewer board certified?

Yes. Dr. Brewer is board certified in surgery by the American Board of Surgery.

Show 8 more questionsShow fewer questions

What services does Dr. Michael Benjamin Brewer bill to Medicare?

In 2019, Dr. Brewer's most billed Medicare services were office visit, established patient (99213).

Where did Dr. Michael Benjamin Brewer go to medical school?

Dr. Brewer graduated from UC Irvine School of Medicine in 2006.

What drugs does Dr. Michael Benjamin Brewer prescribe most?

In 2024 Medicare Part D data, Dr. Brewer's most prescribed drugs by claims were Clopidogrel, Hydrocodone-Acetaminophen and Pentoxifylline.

Has Dr. Michael Benjamin Brewer received payments from drug or device companies?

CMS Open Payments shows $5,561 in general payments to Dr. Brewer from 12 companies from 2017 to 2025. The largest total came from Medtronic, Inc.

How long has Dr. Michael Benjamin Brewer been practicing?

Dr. Brewer graduated from medical school in 2006, 20 years ago.

Does Dr. Michael Benjamin Brewer do research?

Dmand AI links 14 publications to Dr. Brewer, published from 2009 to 2024.

Who does Dr. Michael Benjamin Brewer publish with?

Dr. Brewer's most frequent co-authors are David L-C Lau, MD (3 shared papers), Devinder Singh, MD (2 shared papers) and Matthew K. Folstein, MD (1 shared paper).

What insurance does Dr. Michael Benjamin Brewer accept?

Dr. Brewer is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.

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