Dr. Agnieszka E. Witkowski, MD
- Medicare services, 2021
- 22
- Medicare patients, 2024
- 12
- Part D claims, 2024
- 111
- Publications
- 2
- Hospital affiliations
- 1
- Practice address
- 975 Sereno Dr, Vallejo, CA 94589
- Practice phone
- Call (707) 651-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Witkowski'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. Agnieszka E. Witkowski is an internist in Vallejo, California
Dr. Witkowski practices at Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente.
Dr. Witkowski's NPI, 1043486897, was assigned on May 1, 2008. Dr. Witkowski graduated from UC Davis School of Medicine in 2008. Dr. Witkowski holds California license A109830.
- NPI
- 1043486897NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335327857
- NPI enumeration date
- May 1, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 651-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Agnieszka E. Witkowski practices at Vallejo Medical Center in Vallejo, California
Dr. Witkowski's primary practice is Vallejo Medical Center, at 975 Sereno Dr, Vallejo, CA 94589 in Solano County. The practice phone is (707) 651-1000.
- Vallejo Medical Center975 Sereno Dr, Vallejo, CA 94589 · Solano CountyPhone(707) 651-1000
Source: Dmand AI Affiliation Data
Dr. Agnieszka E. Witkowski is affiliated with 4 sites of care and 1 medical group
Dr. Witkowski's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Witkowski to 1 more group practice or clinic, 1 home health agency and 1 hospice, 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. Agnieszka E. Witkowski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Witkowski practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Vallejo Medical Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Kaiser Permanente and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Agnieszka E. Witkowski is one of 16,751 internists in California
Internal medicine is Dr. Witkowski's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Witkowski is board certified in hospice and palliative medicine by the American Board of Internal Medicine. Dr. Witkowski is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Witkowski
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. Agnieszka E. Witkowski billed Medicare for 22 services in 2021
CMS data shows 22 Medicare services from Dr. Witkowski across 1 procedure code in 2021, for 12 Medicare patients. Medicare paid $1,349 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Witkowski's Medicare services by type, 2019 to 2021
- 2019
- 2021
- Office and hospital visits
- 2019: 272021: 2219%
Dr. Witkowski compared with the California median for internists, 2021
- Dr. Witkowski
- California median
- Medicare services
- 22vs 36194% below
- Medicare patients
- 12vs 15192% below
- Part D claims
- 13vs 42197% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Witkowski'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. Witkowski?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Witkowski and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Agnieszka E. Witkowski treated 12 Medicare patients in 2024, average age 73
CMS counts 12 Medicare patients who saw Dr. Witkowski in 2024. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 4.19, 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. Witkowski's median patient age at 66, with 64% women.
Chronic conditions among Dr. Witkowski's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
Share of Medicare patients with each condition. A patient can have several.
Dr. Witkowski'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
- Women64%
- Men36%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Agnieszka E. Witkowski wrote 111 Medicare Part D claims in 2024
In 2024, Dr. Witkowski wrote 111 Medicare Part D claims for 41 patients. 80% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $118 in total drug cost. In 2022, CMS named 38 claims across 3 drugs.
Dr. Witkowski's Part D claims by kind of drug, 2024
- Generic89 claims80%
- Brand-name and other22 claims20%
Dr. Witkowski's most prescribed drugs by claims, 2023
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. Witkowski's Part D claims, 2024
- Antibiotics14%16 of 111 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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 382023: 1366%
Drugs named by CMS: 1 in 2023, 3 in 2022.
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. Agnieszka E. Witkowski takes part in Medicare
Dr. Witkowski 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Agnieszka E. Witkowski has 2 publications on record
Dmand AI links 2 papers to Dr. Witkowski in 2023. Dr. Witkowski's most frequent co-authors are Vincent Liu, MD and Vivian M. Reyes, MD.
Dr. Witkowski's most frequent co-authors
Recent publications by Dr. Witkowski
See who Dr. Witkowski researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Witkowski works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Agnieszka E. Witkowski has 1 award and honors on record
Dmand AI lists 1 award for Dr. Witkowski, most recently CMS Stage 1 EHR in 2012.
Awards and honors for Dr. Witkowski
- 2012
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Agnieszka E. Witkowski graduated from UC Davis School of Medicine
Dr. Witkowski graduated from UC Davis School of Medicine in 2008.
- Medical school
- Board certified in hospice and palliative medicine
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Agnieszka E. Witkowski accepts plans from 2 insurance carriers
Dr. Witkowski 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. Witkowski accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Agnieszka E. Witkowski'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Agnieszka E. Witkowski
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. Agnieszka E. Witkowski's NPI number?
Dr. Agnieszka E. Witkowski's NPI number is 1043486897. It was assigned on May 1, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Agnieszka E. Witkowski?
Dr. Agnieszka E. Witkowski is an internist in Vallejo, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Agnieszka E. Witkowski practice?
Dr. Witkowski practices at 975 Sereno Dr, Vallejo, CA 94589. Dr. Witkowski's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. Dmand AI also links Dr. Witkowski to 1 group practice or clinic, 1 home health agency and 1 hospice.
What is Dr. Agnieszka E. Witkowski's office phone number?
The practice phone on file for Dr. Witkowski is (707) 651-1000.
What is Dr. Agnieszka E. Witkowski's medical license number?
Dr. Witkowski holds California license A109830.
Which hospitals is Dr. Agnieszka E. Witkowski affiliated with?
Dr. Witkowski practices at Vallejo Medical Center in Vallejo, California.
What medical group is Dr. Agnieszka E. Witkowski part of?
Dr. Witkowski is linked to The Permanente Medical Group, Inc.
Does Dr. Agnieszka E. Witkowski accept Medicare?
Yes. CMS data shows Dr. Witkowski billed Medicare for 22 services in 2021, and Dr. Witkowski accepts Medicare assignment.
How many Medicare patients does Dr. Agnieszka E. Witkowski see?
CMS counts 12 Medicare patients who saw Dr. Witkowski in 2024, with an average age of 73.
Is Dr. Agnieszka E. Witkowski board certified?
Yes. Dr. Witkowski is board certified in hospice and palliative medicine by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Agnieszka E. Witkowski bill to Medicare?
In 2021, Dr. Witkowski's most billed Medicare services were hospital inpatient care (99232).
Where did Dr. Agnieszka E. Witkowski go to medical school?
Dr. Witkowski graduated from UC Davis School of Medicine in 2008.
What drugs does Dr. Agnieszka E. Witkowski prescribe most?
In 2023 Medicare Part D data, Dr. Witkowski's most prescribed drugs by claims were Doxycycline Monohydrate.
How long has Dr. Agnieszka E. Witkowski been practicing?
Dr. Witkowski graduated from medical school in 2008, 18 years ago.
Does Dr. Agnieszka E. Witkowski do research?
Dmand AI links 2 publications to Dr. Witkowski.
Who does Dr. Agnieszka E. Witkowski publish with?
Dr. Witkowski's most frequent co-authors are Vincent Liu, MD (1 shared paper) and Vivian M. Reyes, MD (1 shared paper).
What insurance does Dr. Agnieszka E. Witkowski accept?
Dr. Witkowski 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.
Selling to internal medicine practices?
See internists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card