Dr. James W. Lyon, MD

  • San Diego, CA
  • Diagnostic radiologist
NPI1689647331PAC ID6305946070
Medicare services, 2024
507
Medicare patients, 2024
328
Part D claims, 2018
12
Publications
3
Clinical trials
1
Practice address
7901 Frost St, San Diego, CA 92123
Practice phone
Call (858) 939-3400
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

Sharp Memorial Hospital

Hospital · San Diego, California

See all 11 affiliations

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Dr. James W. Lyon is a diagnostic radiologist in San Diego, California

Dr. Lyon practices at Sharp Memorial Hospital in San Diego, California, part of Sharp HealthCare.

Dr. Lyon's NPI, 1689647331, was assigned on February 10, 2006. Dr. Lyon graduated from Indiana University School Of Medicine in 1979. Dr. Lyon holds California license A36265.

NPI and contact details
Medicare PAC ID
6305946070
NPI enumeration date
February 10, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(858) 939-3400
Professional email
Get email
Personal email
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Mobile number
Get number
Sex
Male
Estimated age
73
Medical school graduation
1979

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

Dr. James W. Lyon practices at Sharp Memorial Hospital in San Diego, California

Dr. Lyon's primary practice is Sharp Memorial Hospital, at 7901 Frost St, San Diego, CA 92123 in San Diego County. The practice phone is (858) 939-3400.

Source: Dmand AI Affiliation Data

Dr. James W. Lyon is affiliated with 7 sites of care and 4 medical groups

Dr. Lyon's primary practice is Sharp Memorial Hospital in San Diego, California, part of Sharp HealthCare. Dr. Lyon is also affiliated with Sharp Chula Vista Medical Center. The medical group on file is Emergency and Acute Care Medical Corporation. Dmand AI also links Dr. Lyon to 1 more hospital, 4 group practices and clinics and 3 medical groups, each named with a free account.

See all 11 affiliations for Dr. Lyon

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

Dmand AI tracks the EHR system at Dr. James W. Lyon's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lyon practices, 7 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Sharp Memorial HospitalAvailable with a free account
+6 more sites and 3 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dr. James W. Lyon is one of 4,096 diagnostic radiologists in California

Diagnostic radiology is Dr. Lyon's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dr. Lyon is board certified in interventional radiology and diagnostic radiology by the American Board of Radiology. Dmand AI has Dr. Lyon's licenses on file in 2 states: California and Indiana.

Specialties and state licenses

  • Diagnostic radiology, CaliforniaPrimaryLicense A36265 · 1981 to 2026 · taxonomy 2085R0202X
  • Indiana license1979 to 1980

Diagnostic radiologists near Dr. Lyon

Counts of diagnostic radiologists 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. James W. Lyon billed Medicare for 507 services in 2024

CMS data shows 507 Medicare services from Dr. Lyon across 15 procedure codes in 2024, for 328 Medicare patients. Medicare paid $25,810 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024507
Medicare patients328
Paid by Medicare$25,810
Procedure codes15

Dr. Lyon's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Surgery
2023: 1772024: 1886%
Tests and treatments
2023: 1652024: 1631%
Imaging
2023: 1192024: 15631%

Dr. Lyon compared with the California median for diagnostic radiologists, 2024

  • Dr. Lyon
  • California median
Medicare services
507vs 2,28178% below
Medicare patients
328vs 1,34676% below
Part D claims
12vs 1414% below

Medians across 3,734 diagnostic radiologists in California with Dmand AI profiles that report each measure.

Dr. Lyon'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.

See all procedures by Dr. Lyon

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

Dr. James W. Lyon treated 328 Medicare patients in 2024, average age 74

CMS counts 328 Medicare patients who saw Dr. Lyon in 2024. The largest group is 65 to 74, with 126 patients. 75% of them have high blood pressure, and 73% have high cholesterol. 36% are also on Medicaid. Their average risk score is 2.83, 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. Lyon's median patient age at 64, with 52% women.

Medicare patients, 2024328
Average age74
Average risk score2.83
Also on Medicaid36%

Dr. Lyon's Medicare patients by age, 2024

Dr. Lyon's Medicare patients by sex, 2024

  • Women18255%
  • Men14645%

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

  1. High blood pressure75%
  2. High cholesterol73%
  3. Chronic kidney disease52%
  4. Arthritis49%
  5. Diabetes46%
  6. Ischemic heart disease43%
  7. Heart failure37%
  8. Cancer36%

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

Dr. Lyon's patients across all payers

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

Patient panel by age, all payers

Median age 64

Patient panel by sex, all payers

  • Women52%
  • Men47%

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

Dr. James W. Lyon wrote 12 Medicare Part D claims in 2018

In 2018, Dr. Lyon wrote 12 Medicare Part D claims. They cover 1 drug, with $146 in total drug cost. In 2017, CMS named 11 claims across 1 drug.

Part D claims, 201812
Drugs named by CMS1
Total drug cost$146

Dr. Lyon's most prescribed drugs by claims, 2018

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

Part D claims for drugs CMS names, 2017 to 2018

  • 2017
  • 2018
Claims for drugs CMS names
2017: 112018: 129%

Drugs named by CMS: 1 in 2018, 1 in 2017.

See all prescribing by Dr. Lyon

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

Dr. James W. Lyon scored 99 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 99 out of 100 for Dr. Lyon for performance year 2024, reported as part of a group. Dr. Lyon accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Dr. Lyon's MIPS scores, performance year 2024

  • 99of 100Final score
  • 100of 100Quality
  • 40of 100Improvement Activities
  • 72of 100Cost

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

Leg revascularization (restoring blood flow): 1 to 10 procedures (CMS shows small counts as a range)

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

For MedTech and pharma teams

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Dr. James W. Lyon has 3 publications on record

Dmand AI links 3 papers to Dr. Lyon in 2019. Dr. Lyon has published most often in J Vasc Interv Radiol. Dr. Lyon's most frequent co-authors are Stephen Barnett Solomon, MD, Yunzu Michele Wang, MD and Janet M. Yoon, MD.

Papers3

Dr. Lyon's most frequent co-authors

Recent publications by Dr. Lyon

See all 3 publications and co-authors

See who Dr. Lyon researches with

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

How network discovery works

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

Dr. James W. Lyon has worked on 1 clinical trial

Dmand AI links Dr. Lyon to 1 clinical trial. Conditions studied include Breast Neoplasms and Breast Diseases.

Conditions in Dr. Lyon's trials

  • Breast Neoplasms
  • Breast Diseases

Recent clinical trials with Dr. Lyon

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. James W. Lyon received $22,590 in industry payments from 2016 to 2025

CMS Open Payments shows 269 general payments to Dr. Lyon from 30 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 60% of the total. Toshiba America Medical Systems, Inc. paid the most, $6,353.

General payments to Dr. Lyon by program year, 2016 to 2025

General payments to Dr. Lyon by kind, 2016 to 2025

$22.6Kin total
  • Food and beverage$13,61060%
  • Consulting fees$5,00022%
  • Honoraria$2,50011%
  • Travel and lodging$1,3966%
  • Education$840%

Companies that paid Dr. Lyon the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Lyon

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

Dr. James W. Lyon has 3 awards and honors on record

Dmand AI lists 3 awards for Dr. Lyon, most recently Top Doctors:San Diego Area in 2013.

Awards and honors for Dr. Lyon

  1. 2013
    • Top Doctors:San Diego Area
  2. 2012
    • Top Doctors:Southern California
  3. Undated
    • Super Doc

Source: Dmand AI Professional Profile Data

Dr. James W. Lyon graduated from Indiana University School Of Medicine

Dr. Lyon graduated from Indiana University School Of Medicine in 1979. Dr. Lyon is a member of SIR.

  1. Medical schoolIndiana University School Of Medicine
  2. Board certified in interventional radiology and diagnostic radiologyAmerican Board of Radiology

Source: Dmand AI Professional Profile Data

Dr. James W. Lyon accepts plans from 7 insurance carriers

Dr. Lyon is in network with 7 carriers, including United Healthcare, Molina and Aspirus Health Plan. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.

  • United Healthcare
  • Molina
  • Aspirus Health Plan
  • Blue Cross and Blue Shield of Kansas City
  • CMS Medicare
  • Elevance
  • HCSC

Plan types Dr. Lyon accepts, by number of carriers

  1. Medicare3
  2. PPO3
  3. HMO2
  4. POS2
  5. EPO1

Source: Dmand AI Insurance Network Data

Sources for Dr. James W. Lyon'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)
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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
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. James W. Lyon

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. James W. Lyon's NPI number?

Dr. James W. Lyon's NPI number is 1689647331. It was assigned on February 10, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. James W. Lyon?

Dr. James W. Lyon is a diagnostic radiologist in San Diego, California. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).

Where does Dr. James W. Lyon practice?

Dr. Lyon practices at 7901 Frost St, San Diego, CA 92123. Dr. Lyon's primary practice is Sharp Memorial Hospital in San Diego, California, part of Sharp HealthCare. Dmand AI also links Dr. Lyon to 1 hospital, 4 group practices and clinics and 3 medical groups.

What is Dr. James W. Lyon's office phone number?

The practice phone on file for Dr. Lyon is (858) 939-3400.

What is Dr. James W. Lyon's medical license number?

Dr. Lyon holds California license A36265, one of the licenses on file in 2 states.

Which states has Dr. James W. Lyon been licensed in?

Dmand AI has state licenses on file for Dr. Lyon in California (1981 to 2026) and Indiana (1979 to 1980).

Which hospitals is Dr. James W. Lyon affiliated with?

Dr. Lyon practices at Sharp Memorial Hospital in San Diego, California. Dr. Lyon is also affiliated with Sharp Chula Vista Medical Center. Dmand AI links Dr. Lyon to 1 more hospital.

What medical group is Dr. James W. Lyon part of?

Dr. Lyon is linked to Emergency and Acute Care Medical Corporation. Dmand AI links Dr. Lyon to 3 more medical groups.

Does Dr. James W. Lyon accept Medicare?

Yes. CMS data shows Dr. Lyon billed Medicare for 507 services in 2024, and Dr. Lyon accepts Medicare assignment.

What is Dr. James W. Lyon's MIPS score?

Dr. Lyon's MIPS final score for performance year 2024 is 99 out of 100, reported as part of a group.

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. James W. Lyon see?

CMS counts 328 Medicare patients who saw Dr. Lyon in 2024, with an average age of 74.

Is Dr. James W. Lyon board certified?

Yes. Dr. Lyon is board certified in interventional radiology and diagnostic radiology by the American Board of Radiology.

What services does Dr. James W. Lyon bill to Medicare?

In 2024, Dr. Lyon's most billed Medicare services were special service (99152), radiation oncology (77012) and surgery: lungs and airway (32555).

Where did Dr. James W. Lyon go to medical school?

Dr. Lyon graduated from Indiana University School Of Medicine in 1979.

What drugs does Dr. James W. Lyon prescribe most?

In 2018 Medicare Part D data, Dr. Lyon's most prescribed drugs by claims were Clopidogrel.

Has Dr. James W. Lyon received payments from drug or device companies?

CMS Open Payments shows $22,590 in general payments to Dr. Lyon from 30 companies from 2016 to 2025. The largest total came from Toshiba America Medical Systems, Inc.

How long has Dr. James W. Lyon been practicing?

Dr. Lyon graduated from medical school in 1979, 47 years ago.

Does Dr. James W. Lyon do research?

Dmand AI links 3 publications to Dr. Lyon. Dr. Lyon has worked on 1 clinical trial.

Who does Dr. James W. Lyon publish with?

Dr. Lyon's most frequent co-authors are Stephen Barnett Solomon, MD (1 shared paper), Yunzu Michele Wang, MD (1 shared paper) and Janet M. Yoon, MD (1 shared paper).

What insurance does Dr. James W. Lyon accept?

Dr. Lyon is in network with 7 carriers, including United Healthcare, Molina and Aspirus Health Plan. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.

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