Clin Neuroradiol
Central Nervous System Bacterial InfectionsDiffusion Magnetic Resonance ImagingDiscitis
Dr. Courtnay Willcox Bloomer, MD
NPI1093764565PAC ID6002965027
- Medicare services, 2024
- 7,550
- Medicare patients, 2024
- 3,602
- Publications
- 12
- MIPS score, 2024
- 91
- Hospital affiliations
- 6
- Practice address
- 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598
- Practice phone
- Call (925) 939-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Bloomer's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Courtnay Willcox Bloomer is a neuroradiologist in Walnut Creek, California
Dr. Bloomer practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health.
Dr. Bloomer's NPI, 1093764565, was assigned on May 10, 2006. Dr. Bloomer graduated from Sidney Kimmel Medical College in 2003. Dr. Bloomer's North Carolina license number on file is 2014-01400.
NPI and contact details
- NPI
- 1093764565NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6002965027
- NPI enumeration date
- May 10, 2006
- NPI status
- Active
- Practice phone
- (925) 939-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Courtnay Willcox Bloomer practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California
Dr. Bloomer'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.
- John Muir Medical Center, Walnut Creek1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 · Contra Costa CountyPhone(925) 939-3000
Source: Dmand AI Affiliation Data
Dr. Courtnay Willcox Bloomer is affiliated with 14 sites of care and 12 medical groups
Dr. Bloomer's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dr. Bloomer is also affiliated with Santa Clara Valley Medical Center. The medical group on file is UCSF Department of Radiology & Biomedical Imaging. Dmand AI also links Dr. Bloomer to 4 more hospitals, 11 medical groups and 8 group practices and clinics, each named with a free account.
Santa Clara Valley Medical CenterUCSF Department of Radiology & Biomedical Imaging4 hospitalsNames with a free account11 medical groupsNames with a free account8 group practices and clinicsNames with a free account
See all 26 affiliations for Dr. BloomerSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Courtnay Willcox Bloomer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Bloomer practices, 14 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| John Muir Medical Center, Walnut Creek | Available with a free account |
| +13 more sites and 11 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Courtnay Willcox Bloomer is one of 202 neuroradiologists in California
Neuroradiology is Dr. Bloomer's primary specialty in the NPI Registry, under taxonomy code 2085N0700X. Dr. Bloomer is board certified in diagnostic radiology by the American Board of Radiology. Dmand AI has Dr. Bloomer's licenses on file in 8 states: North Carolina, Arizona, Hawaii, California, Virginia, Ohio, Florida and Pennsylvania.
Specialties and state licenses
- Neuroradiology, North CarolinaPrimary
- Arizona license
- Hawaii license
- California license
- Virginia license
- Ohio license
- Florida license
- Pennsylvania license
Neuroradiologists near Dr. Bloomer
Counts of neuroradiologists with a Dmand AI profile, by place and practice. Each opens the list.
202neuroradiologists in California
2neuroradiologists in Walnut Creek
2neuroradiologists at John Muir Medical Center, Walnut CreekSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Courtnay Willcox Bloomer billed Medicare for 7,550 services in 2024
CMS data shows 7,550 Medicare services from Dr. Bloomer across 56 procedure codes in 2024, for 3,602 Medicare patients. Medicare paid $178,797 for them.
Medicare services, 20247,550
Medicare patients3,602
Paid by Medicare$178,797
Procedure codes56
Dr. Bloomer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 4,2472024: 4,68510%
- Other services
- 2023: 8,3802024: 2,75067%
- Tests and treatments
- 2023: 702024: 11564%
Where Dr. Bloomer's Medicare services took place, 2024
- In an office2,97539%
- In a facility4,57561%
Dr. Bloomer compared with the California median for neuroradiologists, 2024
- Dr. Bloomer
- California median
- Medicare services
- 7,550vs 1,3265.7 times
- Medicare patients
- 3,602vs 8864.1 times
Medians across 174 neuroradiologists in California with Dmand AI profiles that report each measure.
Dr. Bloomer'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.
Need commercial claims for Dr. Bloomer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Bloomer and other neuroradiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Courtnay Willcox Bloomer treated 3,602 Medicare patients in 2024, average age 76
CMS counts 3,602 Medicare patients who saw Dr. Bloomer in 2024. The largest group is 75 to 84, with 1,258 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 42% are also on Medicaid. Their average risk score is 2.17, 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. Bloomer's median patient age at 53, with 55% women.
Medicare patients, 20243,602
Average age76
Average risk score2.17
Also on Medicaid42%
Dr. Bloomer's Medicare patients by age, 2024
Dr. Bloomer's Medicare patients by sex, 2024
- Women2,06957%
- Men1,53343%
Chronic conditions among Dr. Bloomer's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis49%
- Diabetes43%
- Chronic kidney disease40%
- Mood disorders38%
- Ischemic heart disease35%
- Depression34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Bloomer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women55%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Courtnay Willcox Bloomer scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Bloomer for performance year 2024, reported as part of a group.
Dr. Bloomer's MIPS scores, performance year 2024
- 91of 100Final score
- 84.1of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Courtnay Willcox Bloomer has 12 publications on record
Dmand AI links 12 papers to Dr. Bloomer in 2018. The most frequent topics are Magnetic Resonance Imaging, Alcoholism and Brain. Dr. Bloomer's most frequent co-authors are Rita G. Bhatia, MD, Kim Marie Caban, MD and Cynthia S. Chin, MD.
Papers12
Topics Dr. Bloomer writes about most
- Magnetic Resonance Imaging
- Alcoholism
- Brain
- Choline
- Magnetic Resonance Spectroscopy
- Prefrontal Cortex
Dr. Bloomer's most frequent co-authors
Recent publications by Dr. Bloomer
Top Magn Reson Imaging
AstrocytomaDermoid CystEpendymoma
Magn Reson Med
AgingAlgorithmsBrain
See who Dr. Bloomer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Bloomer works with, so you can find a warm path to the right neuroradiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Courtnay Willcox Bloomer received $154 in industry payments in 2017
CMS Open Payments shows 2 general payments to Dr. Bloomer from 2 drug and device companies in 2017. Food and beverage make up the largest share, 100% of the total. Actelion Pharmaceuticals US, Inc. paid the most, $136.
Companies that paid Dr. Bloomer the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Courtnay Willcox Bloomer has 3 awards and honors on record
Dmand AI lists 3 awards for Dr. Bloomer, most recently Student Research Travel Fellowship in 2002.
Awards and honors for Dr. Bloomer
- 2002
- Student Research Travel Fellowship
- 2000
- Scholarship Grant
- Summer Research Fellowship
Source: Dmand AI Professional Profile Data
Dr. Courtnay Willcox Bloomer graduated from Sidney Kimmel Medical College
Dr. Bloomer graduated from Sidney Kimmel Medical College in 2003.
- Medical school
- Board certified in diagnostic radiology
- Board certified in neuroradiology
Source: Dmand AI Professional Profile Data
Dr. Courtnay Willcox Bloomer accepts plans from 9 insurance carriers
Dr. Bloomer is in network with 9 carriers, including Excellus BlueCross BlueShield, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Excellus BlueCross BlueShield
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
- Elevance
- NC State Medicaid
- +1 more carriersWith a free account
Plan types Dr. Bloomer accepts, by number of carriers
- Medicare6
- PPO6
- Medicaid2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Courtnay Willcox Bloomer'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Courtnay Willcox Bloomer
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. Courtnay Willcox Bloomer's NPI number?
Dr. Courtnay Willcox Bloomer's NPI number is 1093764565. It was assigned on May 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Courtnay Willcox Bloomer?
Dr. Courtnay Willcox Bloomer is a neuroradiologist in Walnut Creek, California. The primary specialty in the NPI Registry is Neuroradiology Physician (taxonomy code 2085N0700X).
Where does Dr. Courtnay Willcox Bloomer practice?
Dr. Bloomer practices at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598. Dr. Bloomer's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dmand AI also links Dr. Bloomer to 4 hospitals, 11 medical groups and 8 group practices and clinics.
What is Dr. Courtnay Willcox Bloomer's office phone number?
The practice phone on file for Dr. Bloomer is (925) 939-3000.
What is Dr. Courtnay Willcox Bloomer's medical license number?
Dr. Bloomer's North Carolina license number on file is 2014-01400, one of the licenses on file in 8 states.
Which states has Dr. Courtnay Willcox Bloomer been licensed in?
Dmand AI has state licenses on file for Dr. Bloomer in North Carolina (2014 to 2020), Arizona (since 2012), Hawaii (2014 to 2026), California (2008 to 2025), Virginia (2020 to 2024), Ohio (2014 to 2019), Florida (2007 to 2017) and Pennsylvania (2003 to 2004).
Which hospitals is Dr. Courtnay Willcox Bloomer affiliated with?
Dr. Bloomer practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California. Dr. Bloomer is also affiliated with Santa Clara Valley Medical Center. Dmand AI links Dr. Bloomer to 4 more hospitals.
What medical group is Dr. Courtnay Willcox Bloomer part of?
Dr. Bloomer is linked to UCSF Department of Radiology & Biomedical Imaging. Dmand AI links Dr. Bloomer to 11 more medical groups.
Does Dr. Courtnay Willcox Bloomer accept Medicare?
Yes. CMS data shows Dr. Bloomer billed Medicare for 7,550 services in 2024.
What is Dr. Courtnay Willcox Bloomer's MIPS score?
Dr. Bloomer's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. Courtnay Willcox Bloomer see?
CMS counts 3,602 Medicare patients who saw Dr. Bloomer in 2024, with an average age of 76.
Is Dr. Courtnay Willcox Bloomer board certified?
Yes. Dr. Bloomer is board certified in diagnostic radiology by the American Board of Radiology.
What services does Dr. Courtnay Willcox Bloomer bill to Medicare?
In 2024, Dr. Bloomer's most billed Medicare services were medical supplies or transport (A9585), diagnostic imaging (71045) and diagnostic imaging (70450).
Where did Dr. Courtnay Willcox Bloomer go to medical school?
Dr. Bloomer graduated from Sidney Kimmel Medical College in 2003.
Has Dr. Courtnay Willcox Bloomer received payments from drug or device companies?
CMS Open Payments shows $154 in general payments to Dr. Bloomer from 2 companies from 2017 to 2017. The largest total came from Actelion Pharmaceuticals US, Inc.
How long has Dr. Courtnay Willcox Bloomer been practicing?
Dr. Bloomer graduated from medical school in 2003, 23 years ago.
Does Dr. Courtnay Willcox Bloomer do research?
Dmand AI links 12 publications to Dr. Bloomer.
Who does Dr. Courtnay Willcox Bloomer publish with?
Dr. Bloomer's most frequent co-authors are Rita G. Bhatia, MD (1 shared paper), Kim Marie Caban, MD (1 shared paper) and Cynthia S. Chin, MD (1 shared paper).
What insurance does Dr. Courtnay Willcox Bloomer accept?
Dr. Bloomer is in network with 9 carriers, including Excellus BlueCross BlueShield, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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