Dr. Jeffrey K. Shimoyama, MD
- Medicare services, 2021
- 14
- Medicare patients, 2024
- 12
- Part D claims, 2024
- 368
- Hospital affiliations
- 1
- Medical group
- 1
- Practice address
- 6041 Cadillac Ave, Los Angeles, CA 90034
- Practice phone
- Call (213) 857-2201
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Shimoyama's professional email, personal email and mobile number
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Dr. Jeffrey K. Shimoyama is an internist in Los Angeles, California
Dr. Shimoyama practices at West Los Angeles Medical Center in Los Angeles, California, part of Kaiser Permanente.
Dr. Shimoyama's NPI, 1245307255, was assigned on November 29, 2006. Dr. Shimoyama graduated from UC Davis School of Medicine in 1987. Dr. Shimoyama holds California license G63937.
- NPI
- 1245307255NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9931156940
- NPI enumeration date
- November 29, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (213) 857-2201
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jeffrey K. Shimoyama practices at West Los Angeles Medical Center in Los Angeles, California
Dr. Shimoyama's primary practice is West Los Angeles Medical Center, at 6041 Cadillac Ave, Los Angeles, CA 90034 in Los Angeles County. The practice phone is (213) 857-2201.
- West Los Angeles Medical Center6041 Cadillac Ave, Los Angeles, CA 90034 · Los Angeles CountyPhone(213) 857-2201
Source: Dmand AI Affiliation Data
Dr. Jeffrey K. Shimoyama is affiliated with 2 sites of care and 1 medical group
Dr. Shimoyama's primary practice is West Los Angeles Medical Center in Los Angeles, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Shimoyama to 1 more dialysis center, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jeffrey K. Shimoyama's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Shimoyama practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| West Los Angeles Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jeffrey K. Shimoyama is one of 16,751 internists in California
Internal medicine is Dr. Shimoyama's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Shimoyama is board certified in internal medicine by the American Board of Internal Medicine. Dr. Shimoyama is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists muscle pain, fibromyalgia, and limb pain among the conditions Dr. Shimoyama treats.
Internists near Dr. Shimoyama
Counts of internists 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
Dr. Jeffrey K. Shimoyama billed Medicare for 14 services in 2021
CMS data shows 14 Medicare services from Dr. Shimoyama across 1 procedure code in 2021, all of them office visits, for 12 Medicare patients. Medicare paid $1,494 for them. Every service was in an office.
Dr. Shimoyama's Medicare services by type, 2019 to 2021
- 2019
- 2021
- Office and hospital visits
- 2019: 122021: 1417%
Dr. Shimoyama compared with the California median for internists, 2021
- Dr. Shimoyama
- California median
- Medicare services
- 14vs 36196% below
- Medicare patients
- 12vs 15192% below
- Part D claims
- 213vs 42149% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Shimoyama's most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Shimoyama?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Shimoyama and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jeffrey K. Shimoyama treated 12 Medicare patients in 2024, average age 70
CMS counts 12 Medicare patients who saw Dr. Shimoyama in 2024. The largest group is 85 and over, with 0 patients. Their average risk score is 0.92, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Shimoyama's median patient age at 43, with 63% women.
Dr. Shimoyama's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Shimoyama's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 43
Patient panel by sex, all payers
- Women63%
- Men36%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jeffrey K. Shimoyama wrote 368 Medicare Part D claims in 2024
In 2024, Dr. Shimoyama wrote 368 Medicare Part D claims for 282 patients. 80% of them were for generic drugs. CMS names the drug for 213 of them, across 8 drugs with 11 or more claims each, at $2,848 in total drug cost. In 2023, CMS named 162 claims across 9 drugs.
Dr. Shimoyama's Part D claims by kind of drug, 2024
- Generic294 claims80%
- Brand-name and other74 claims20%
Dr. Shimoyama'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. Shimoyama's Part D claims, 2024
- Antibiotics36%131 of 368 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: 1622024: 21331%
Drugs named by CMS: 8 in 2024, 9 in 2023.
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. Jeffrey K. Shimoyama takes part in Medicare
Dr. Shimoyama 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. Jeffrey K. Shimoyama graduated from UC Davis School of Medicine
Dr. Shimoyama graduated from UC Davis School of Medicine in 1987.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Jeffrey K. Shimoyama accepts plans from 2 insurance carriers
Dr. Shimoyama is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Shimoyama accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Jeffrey K. Shimoyama's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Jeffrey K. Shimoyama
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. Jeffrey K. Shimoyama's NPI number?
Dr. Jeffrey K. Shimoyama's NPI number is 1245307255. It was assigned on November 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jeffrey K. Shimoyama?
Dr. Jeffrey K. Shimoyama is an internist in Los Angeles, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Jeffrey K. Shimoyama practice?
Dr. Shimoyama practices at 6041 Cadillac Ave, Los Angeles, CA 90034. Dr. Shimoyama's primary practice is West Los Angeles Medical Center in Los Angeles, California, part of Kaiser Permanente. Dmand AI also links Dr. Shimoyama to 1 dialysis center.
What is Dr. Jeffrey K. Shimoyama's office phone number?
The practice phone on file for Dr. Shimoyama is (213) 857-2201.
What is Dr. Jeffrey K. Shimoyama's medical license number?
Dr. Shimoyama holds California license G63937.
Which hospitals is Dr. Jeffrey K. Shimoyama affiliated with?
Dr. Shimoyama practices at West Los Angeles Medical Center in Los Angeles, California.
What medical group is Dr. Jeffrey K. Shimoyama part of?
Dr. Shimoyama is linked to Southern California Permanente Medical Group.
Does Dr. Jeffrey K. Shimoyama accept Medicare?
Yes. CMS data shows Dr. Shimoyama billed Medicare for 14 services in 2021, and Dr. Shimoyama accepts Medicare assignment.
How many Medicare patients does Dr. Jeffrey K. Shimoyama see?
CMS counts 12 Medicare patients who saw Dr. Shimoyama in 2024, with an average age of 70.
Is Dr. Jeffrey K. Shimoyama board certified?
Yes. Dr. Shimoyama is board certified in internal medicine by the American Board of Internal Medicine.
Show 5 more questionsShow fewer questions
What services does Dr. Jeffrey K. Shimoyama bill to Medicare?
In 2021, Dr. Shimoyama's most billed Medicare services were office visit, established patient (99214).
Where did Dr. Jeffrey K. Shimoyama go to medical school?
Dr. Shimoyama graduated from UC Davis School of Medicine in 1987.
What drugs does Dr. Jeffrey K. Shimoyama prescribe most?
In 2024 Medicare Part D data, Dr. Shimoyama's most prescribed drugs by claims were Albuterol Sulfate Hfa, Amoxicillin-Clavulanate Potass and Sulfamethoxazole-Trimethoprim.
How long has Dr. Jeffrey K. Shimoyama been practicing?
Dr. Shimoyama graduated from medical school in 1987, 39 years ago.
What insurance does Dr. Jeffrey K. Shimoyama accept?
Dr. Shimoyama is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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