Dr. Kathleen S. Tajiri, MD
- Medicare services, 2024
- 814
- Medicare patients, 2024
- 54
- Part D claims, 2024
- 159
- Hospital affiliations
- 1
- Industry payments
- $714
- Practice address
- 2720 Low Ct, Fairfield, CA 94534-9771
- Practice phone
- Call (707) 428-2731
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sutter Regional Medical Foundation
Multi-specialty group site · Fairfield, California
Find Dr. Tajiri'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. Kathleen S. Tajiri is an allergist and immunologist in Fairfield, California
Dr. Tajiri practices at Sutter Regional Medical Foundation in Fairfield, California.
Dr. Tajiri's NPI, 1689624983, was assigned on May 10, 2006. Dr. Tajiri graduated from Keck School of Medicine of USC in 1986. Dr. Tajiri holds California license G65086.
- NPI
- 1689624983NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1951595305
- NPI enumeration date
- May 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 428-2731
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kathleen S. Tajiri practices at Sutter Regional Medical Foundation in Fairfield, California
Dr. Tajiri's primary practice is Sutter Regional Medical Foundation, at 2720 Low Ct, Fairfield, CA 94534-9771. The practice phone is (707) 428-2731.
- Sutter Regional Medical Foundation2720 Low Ct, Fairfield, CA 94534-9771Phone(707) 428-2731
Source: Dmand AI Affiliation Data
Dr. Kathleen S. Tajiri is affiliated with 3 sites of care and 3 medical groups
Dr. Tajiri's primary practice is Sutter Regional Medical Foundation in Fairfield, California. Dr. Tajiri is also affiliated with Providence Queen of the Valley Medical Center. The medical group on file is SGMF Radiology. Dmand AI also links Dr. Tajiri to 2 more medical groups and 1 group practice or clinic, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Kathleen S. Tajiri's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tajiri practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sutter Regional Medical Foundation | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Kathleen S. Tajiri is one of 386 allergists and immunologists in California
Allergy and immunology is Dr. Tajiri's primary specialty in the NPI Registry, under taxonomy code 207K00000X. Dr. Tajiri is board certified in allergy & immunology by the American Board of Allergy and Immunology. Dr. Tajiri is licensed in California.
Specialties and state licenses
- Allergy and immunology, CaliforniaPrimary
Clinical focus
Dmand AI lists asthma, chronic nasal allergies and immune deficiency disease among the conditions Dr. Tajiri treats.
Allergists and immunologists near Dr. Tajiri
Counts of allergists and immunologists 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. Kathleen S. Tajiri billed Medicare for 814 services in 2024
CMS data shows 814 Medicare services from Dr. Tajiri across 5 procedure codes in 2024, for 54 Medicare patients. Medicare paid $8,496 for them. Every service was in an office.
Dr. Tajiri's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 4652024: 76364%
- Office and hospital visits
- 2023: 292024: 5176%
Dr. Tajiri compared with the California median for allergists and immunologists, 2024
- Dr. Tajiri
- California median
- Medicare services
- 814vs 1,84056% below
- Medicare patients
- 54vs 14563% below
- Part D claims
- 79vs 25969% below
Medians across 368 allergists and immunologists in California with Dmand AI profiles that report each measure.
Dr. Tajiri'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. Tajiri?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tajiri and other allergists and immunologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kathleen S. Tajiri treated 54 Medicare patients in 2024, average age 72
CMS counts 54 Medicare patients who saw Dr. Tajiri in 2024. The largest group is 65 to 74, with 26 patients. 69% of them have high cholesterol, and 57% have high blood pressure. Their average risk score is 1.01, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Tajiri's median patient age at 36, with 59% women.
Dr. Tajiri's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Tajiri's Medicare patients by sex, 2024
- Women3667%
- Men1833%
Chronic conditions among Dr. Tajiri's Medicare patients, 2024
- High cholesterol69%
- High blood pressure57%
- Arthritis39%
- Asthma37%
- Diabetes26%
- Osteoporosis22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tajiri's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 36
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kathleen S. Tajiri wrote 159 Medicare Part D claims in 2024
In 2024, Dr. Tajiri wrote 159 Medicare Part D claims for 43 patients. 68% of them were for generic drugs. CMS names the drug for 79 of them, across 4 drugs with 11 or more claims each, at $18,094 in total drug cost. In 2023, CMS named 117 claims across 4 drugs.
Dr. Tajiri's Part D claims by kind of drug, 2024
- Generic108 claims68%
- Brand-name51 claims32%
Dr. Tajiri'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1172024: 7932%
Drugs named by CMS: 4 in 2024, 4 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. Kathleen S. Tajiri takes part in Medicare
Dr. Tajiri 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. Kathleen S. Tajiri received $714 in industry payments from 2016 to 2025
CMS Open Payments shows 22 general payments to Dr. Tajiri from 8 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 83% of the total. GlaxoSmithKline, LLC. paid the most, $352.
General payments to Dr. Tajiri by program year, 2016 to 2025
General payments to Dr. Tajiri by kind, 2016 to 2025
- Food and beverage$59083%
- Education$12417%
Companies that paid Dr. Tajiri the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Kathleen S. Tajiri graduated from Keck School of Medicine of USC
Dr. Tajiri graduated from Keck School of Medicine of USC in 1986.
- Medical school
- Board certified in allergy & immunology
Source: Dmand AI Professional Profile Data
Dr. Kathleen S. Tajiri accepts plans from 11 insurance carriers
Dr. Tajiri is in network with 11 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Alliant Health Plans
- +3 more carriersWith a free account
Plan types Dr. Tajiri accepts, by number of carriers
- Medicare7
- PPO7
- HMO5
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Kathleen S. Tajiri'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 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) |
| Industry payments | Open Payments (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. Kathleen S. Tajiri
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. Kathleen S. Tajiri's NPI number?
Dr. Kathleen S. Tajiri's NPI number is 1689624983. It was assigned on May 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Kathleen S. Tajiri?
Dr. Kathleen S. Tajiri is an allergist and immunologist in Fairfield, California. The primary specialty in the NPI Registry is Allergy & Immunology Physician (taxonomy code 207K00000X).
Where does Dr. Kathleen S. Tajiri practice?
Dr. Tajiri practices at 2720 Low Ct, Fairfield, CA 94534-9771. Dr. Tajiri's primary practice is Sutter Regional Medical Foundation in Fairfield, California. Dmand AI also links Dr. Tajiri to 2 medical groups and 1 group practice or clinic.
What is Dr. Kathleen S. Tajiri's office phone number?
The practice phone on file for Dr. Tajiri is (707) 428-2731.
What is Dr. Kathleen S. Tajiri's medical license number?
Dr. Tajiri holds California license G65086.
Which hospitals is Dr. Kathleen S. Tajiri affiliated with?
Dr. Tajiri is affiliated with Providence Queen of the Valley Medical Center.
What medical group is Dr. Kathleen S. Tajiri part of?
Dr. Tajiri is linked to SGMF Radiology. Dmand AI links Dr. Tajiri to 2 more medical groups.
Does Dr. Kathleen S. Tajiri accept Medicare?
Yes. CMS data shows Dr. Tajiri billed Medicare for 814 services in 2024, and Dr. Tajiri accepts Medicare assignment.
How many Medicare patients does Dr. Kathleen S. Tajiri see?
CMS counts 54 Medicare patients who saw Dr. Tajiri in 2024, with an average age of 72.
Is Dr. Kathleen S. Tajiri board certified?
Yes. Dr. Tajiri is board certified in allergy & immunology by the American Board of Allergy and Immunology.
Show 6 more questionsShow fewer questions
What services does Dr. Kathleen S. Tajiri bill to Medicare?
In 2024, Dr. Tajiri's most billed Medicare services were allergy test or treatment (95004), office visit, established patient (99214) and allergy test or treatment (95012).
Where did Dr. Kathleen S. Tajiri go to medical school?
Dr. Tajiri graduated from Keck School of Medicine of USC in 1986.
What drugs does Dr. Kathleen S. Tajiri prescribe most?
In 2024 Medicare Part D data, Dr. Tajiri's most prescribed drugs by claims were Montelukast Sodium, Azelastine HCl and Trelegy Ellipta.
Has Dr. Kathleen S. Tajiri received payments from drug or device companies?
CMS Open Payments shows $714 in general payments to Dr. Tajiri from 8 companies from 2016 to 2025. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Kathleen S. Tajiri been practicing?
Dr. Tajiri graduated from medical school in 1986, 40 years ago.
What insurance does Dr. Kathleen S. Tajiri accept?
Dr. Tajiri is in network with 11 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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