Dr. Elizabeth M. Tapen, MD
- Medicare services, 2024
- 292
- Medicare patients, 2024
- 81
- Part D claims, 2024
- 67
- Hospital affiliations
- 3
- Industry payments
- $295
- Practice address
- 1200 B Gale Wilson Blvd, Fairfield, CA 94533
- Practice phone
- Call (707) 646-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Tapen'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. Elizabeth M. Tapen is a radiation oncologist in Fairfield, California
Dr. Tapen practices at NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare.
Dr. Tapen's NPI, 1134108525, was assigned on January 13, 2006. Dr. Tapen graduated from Rutgers School of Dental Medicine in 1990. Dr. Tapen holds New York license 2323381.
- NPI
- 1134108525NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204899107
- NPI enumeration date
- January 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 646-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Elizabeth M. Tapen practices at NorthBay Medical Center in Fairfield, California
Dr. Tapen's primary practice is NorthBay Medical Center, at 1200 B Gale Wilson Blvd, Fairfield, CA 94533 in Solano County. The practice phone is (707) 646-5000.
- NorthBay Medical Center1200 B Gale Wilson Blvd, Fairfield, CA 94533 · Solano CountyPhone(707) 646-5000
Source: Dmand AI Affiliation Data
Dr. Elizabeth M. Tapen is affiliated with 3 sites of care and 4 medical groups
Dr. Tapen's primary practice is NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare. Dr. Tapen is also affiliated with Adventist Health Clear Lake. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Tapen to 1 more hospital and 3 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Elizabeth M. Tapen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tapen practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| NorthBay Medical Center | Available with a free account |
| +2 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across NorthBay Healthcare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Elizabeth M. Tapen is one of 685 radiation oncologists in California
Radiation oncology is Dr. Tapen's primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dr. Tapen is licensed in New York.
Specialties and state licenses
- Radiation oncology, New YorkPrimary
Radiation oncologists near Dr. Tapen
Counts of radiation oncologists 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. Elizabeth M. Tapen billed Medicare for 292 services in 2024
CMS data shows 292 Medicare services from Dr. Tapen across 4 procedure codes in 2024, for 81 Medicare patients. Medicare paid $17,580 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Tapen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 4612024: 29237%
- Office and hospital visits
- 2023: 122024: 0100%
Dr. Tapen compared with the California median for radiation oncologists, 2024
- Dr. Tapen
- California median
- Medicare services
- 292vs 1,44480% below
- Medicare patients
- 81vs 16451% below
- Part D claims
- 32vs 32Close to median
Medians across 633 radiation oncologists in California with Dmand AI profiles that report each measure.
Dr. Tapen'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tapen and other radiation oncologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Elizabeth M. Tapen treated 81 Medicare patients in 2024, average age 75
CMS counts 81 Medicare patients who saw Dr. Tapen in 2024. The largest group is 65 to 74, with 45 patients. 75% of them have cancer, and 68% have high blood pressure. 31% are also on Medicaid. Their average risk score is 1.37, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Tapen's median patient age at 66, with 37% women.
Dr. Tapen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Tapen's Medicare patients by sex, 2024
- Women4049%
- Men4151%
Chronic conditions among Dr. Tapen's Medicare patients, 2024
- Cancer75%
- High blood pressure68%
- High cholesterol62%
- Arthritis36%
- COPD23%
- Diabetes23%
- Atrial fibrillation22%
- Chronic kidney disease22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tapen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women37%
- Men63%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Elizabeth M. Tapen wrote 67 Medicare Part D claims in 2024
In 2024, Dr. Tapen wrote 67 Medicare Part D claims for 33 patients. 97% of them were for generic drugs. CMS names the drug for 32 of them, across 1 drug with 11 or more claims each, at $466 in total drug cost. In 2023, CMS named 50 claims across 1 drug.
Dr. Tapen's Part D claims by kind of drug, 2024
- Generic65 claims97%
- Brand-name and other2 claims3%
Dr. Tapen'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: 502024: 3236%
Drugs named by CMS: 1 in 2024, 1 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. Elizabeth M. Tapen takes part in Medicare
Dr. Tapen 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. Elizabeth M. Tapen received $295 in industry payments from 2016 to 2025
CMS Open Payments shows 15 general payments to Dr. Tapen from 10 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $69.
General payments to Dr. Tapen by program year, 2016 to 2025
Companies that paid Dr. Tapen 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. Elizabeth M. Tapen graduated from Rutgers School of Dental Medicine
Dr. Tapen graduated from Rutgers School of Dental Medicine in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Elizabeth M. Tapen'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Elizabeth M. Tapen
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. Elizabeth M. Tapen's NPI number?
Dr. Elizabeth M. Tapen's NPI number is 1134108525. It was assigned on January 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Elizabeth M. Tapen?
Dr. Elizabeth M. Tapen is a radiation oncologist in Fairfield, California. The primary specialty in the NPI Registry is Radiation Oncology Physician (taxonomy code 2085R0001X).
Where does Dr. Elizabeth M. Tapen practice?
Dr. Tapen practices at 1200 B Gale Wilson Blvd, Fairfield, CA 94533. Dr. Tapen's primary practice is NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare. Dmand AI also links Dr. Tapen to 1 hospital and 3 medical groups.
What is Dr. Elizabeth M. Tapen's office phone number?
The practice phone on file for Dr. Tapen is (707) 646-5000.
What is Dr. Elizabeth M. Tapen's medical license number?
Dr. Tapen holds New York license 2323381.
Which hospitals is Dr. Elizabeth M. Tapen affiliated with?
Dr. Tapen practices at NorthBay Medical Center in Fairfield, California. Dr. Tapen is also affiliated with Adventist Health Clear Lake. Dmand AI links Dr. Tapen to 1 more hospital.
What medical group is Dr. Elizabeth M. Tapen part of?
Dr. Tapen is linked to The Permanente Medical Group, Inc. Dmand AI links Dr. Tapen to 3 more medical groups.
Does Dr. Elizabeth M. Tapen accept Medicare?
Yes. CMS data shows Dr. Tapen billed Medicare for 292 services in 2024, and Dr. Tapen accepts Medicare assignment.
How many Medicare patients does Dr. Elizabeth M. Tapen see?
CMS counts 81 Medicare patients who saw Dr. Tapen in 2024, with an average age of 75.
What services does Dr. Elizabeth M. Tapen bill to Medicare?
In 2024, Dr. Tapen's most billed Medicare services were radiation oncology (77014), radiation oncology (77427) and radiation oncology (77300).
Show 4 more questionsShow fewer questions
Where did Dr. Elizabeth M. Tapen go to medical school?
Dr. Tapen graduated from Rutgers School of Dental Medicine in 1990.
What drugs does Dr. Elizabeth M. Tapen prescribe most?
In 2024 Medicare Part D data, Dr. Tapen's most prescribed drugs by claims were Tamsulosin HCl.
Has Dr. Elizabeth M. Tapen received payments from drug or device companies?
CMS Open Payments shows $295 in general payments to Dr. Tapen from 10 companies from 2016 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Elizabeth M. Tapen been practicing?
Dr. Tapen graduated from medical school in 1990, 36 years ago.
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