Dr. Kristen Willison, MD
- Medicare services, 2024
- 998
- Medicare patients, 2024
- 220
- Part D claims, 2024
- 3,982
- Industry payments
- $5,459
- Affiliated sites
- 1
- Practice address
- 50 S San Mateo Dr, San Mateo, CA 94401
- Practice phone
- Call (650) 348-5882
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Plastic Surgery Associates Surgery Center
San Mateo, California
Find Dr. Willison'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. Kristen Willison is a family medicine physician in San Mateo, California
Dr. Willison practices at Plastic Surgery Associates Surgery Center in San Mateo, California.
Dr. Willison's NPI, 1306831599, was assigned on September 14, 2005. Dr. Willison graduated from UNR Med in 1988. Dr. Willison holds California license G072317.
- NPI
- 1306831599NPI Registry (opens in a new tab)
- NPI enumeration date
- September 14, 2005
- NPI status
- Active
- Practice phone
- (650) 348-5882
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Kristen Willison practices at Plastic Surgery Associates Surgery Center in San Mateo, California
Dr. Willison's primary practice is Plastic Surgery Associates Surgery Center, at 50 S San Mateo Dr, San Mateo, CA 94401 in San Mateo County. The practice phone is (650) 348-5882.
- Plastic Surgery Associates Surgery Center50 S San Mateo Dr, San Mateo, CA 94401 · San Mateo CountyPhone(650) 348-5882
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Kristen Willison is affiliated with 2 sites of care and 1 medical group
Dr. Willison's primary practice is Plastic Surgery Associates Surgery Center in San Mateo, California. The medical group on file is Bay Family Medical Group. Dmand AI also links Dr. Willison to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Kristen Willison's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Willison practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Plastic Surgery Associates Surgery Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Kristen Willison is one of 15,680 family medicine physicians in California
Family medicine is Dr. Willison's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Willison is board certified in family medicine by the American Board of Family Medicine. Dmand AI has Dr. Willison's licenses on file in 2 states: California and Arizona.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
- Arizona license
Clinical focus
Dmand AI lists acid reflux, acute sinusitis, acute skin infection, alzheimer's disease, ankle or foot injury, anxiety, arthritis and asthma among the conditions Dr. Willison treats.
Family medicine physicians near Dr. Willison
Counts of family medicine physicians 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. Kristen Willison billed Medicare for 998 services in 2024
CMS data shows 998 Medicare services from Dr. Willison across 9 procedure codes in 2024, for 220 Medicare patients. Medicare paid $76,497 for them. Every service was in an office.
Dr. Willison's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4892024: 4931%
- Other services
- 2023: 1702024: 460171%
- Tests and treatments
- 2023: 612024: 3051%
- Surgery
- 2023: 02024: 15
Dr. Willison compared with the California median for family medicine physicians, 2024
- Dr. Willison
- California median
- Medicare services
- 998vs 2464.1 times
- Medicare patients
- 220vs 11886% above
- Part D claims
- 3,396vs 8334.1 times
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Willison'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. Willison and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kristen Willison treated 220 Medicare patients in 2024, average age 78
CMS counts 220 Medicare patients who saw Dr. Willison in 2024. The largest group is 65 to 74, with 95 patients. 75% of them have high cholesterol, and 66% have high blood pressure. Their average risk score is 0.85, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Willison's median patient age at 70, with 79% women.
Dr. Willison's Medicare patients by age, 2024
Dr. Willison's Medicare patients by sex, 2024
- Women18082%
- Men4018%
Chronic conditions among Dr. Willison's Medicare patients, 2024
- High cholesterol75%
- High blood pressure66%
- Arthritis33%
- Osteoporosis22%
- Cancer21%
- Chronic kidney disease16%
- Anxiety14%
- COPD14%
Share of Medicare patients with each condition. A patient can have several.
Dr. Willison's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women79%
- Men19%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kristen Willison wrote 3,982 Medicare Part D claims in 2024
In 2024, Dr. Willison wrote 3,982 Medicare Part D claims for 506 patients. 89% of them were for generic drugs. CMS names the drug for 3,396 of them, across 75 drugs with 11 or more claims each, at $139,217 in total drug cost. In 2023, CMS named 3,371 claims across 72 drugs.
Dr. Willison's Part D claims by kind of drug, 2024
- Generic3,540 claims89%
- Brand-name and other442 claims11%
Dr. Willison'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.
Drug classes CMS tracks in Dr. Willison's Part D claims, 2024
- Opioids2%63 of 3,982 claims
- Antibiotics3%125 of 3,982 claims
- Antipsychotics, patients 65 and over0%15 of 3,982 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,3712024: 3,3961%
Drugs named by CMS: 75 in 2024, 72 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
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Dr. Kristen Willison received $5,459 in industry payments from 2016 to 2025
CMS Open Payments shows 249 general payments to Dr. Willison from 34 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $670.
General payments to Dr. Willison by program year, 2016 to 2025
General payments to Dr. Willison by kind, 2016 to 2025
- Food and beverage$5,441100%
- Education$170%
Companies that paid Dr. Willison 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. Kristen Willison graduated from UNR Med
Dr. Willison graduated from UNR Med in 1988.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Kristen Willison accepts plans from 14 insurance carriers
Dr. Willison is in network with 14 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. Willison accepts, by number of carriers
- PPO9
- Medicare8
- HMO6
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Kristen Willison'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| 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. Kristen Willison
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. Kristen Willison's NPI number?
Dr. Kristen Willison's NPI number is 1306831599. It was assigned on September 14, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Kristen Willison?
Dr. Kristen Willison is a family medicine physician in San Mateo, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Kristen Willison practice?
Dr. Willison practices at 50 S San Mateo Dr, San Mateo, CA 94401. Dr. Willison's primary practice is Plastic Surgery Associates Surgery Center in San Mateo, California. Dmand AI also links Dr. Willison to 1 group practice or clinic.
What is Dr. Kristen Willison's office phone number?
The practice phone on file for Dr. Willison is (650) 348-5882.
What is Dr. Kristen Willison's medical license number?
Dr. Willison holds California license G072317, one of the licenses on file in 2 states.
Which states has Dr. Kristen Willison been licensed in?
Dmand AI has state licenses on file for Dr. Willison in California (1991 to 2027) and Arizona (1989 to 1992).
What medical group is Dr. Kristen Willison part of?
Dr. Willison is linked to Bay Family Medical Group.
Does Dr. Kristen Willison accept Medicare?
Yes. CMS data shows Dr. Willison billed Medicare for 998 services in 2024.
How many Medicare patients does Dr. Kristen Willison see?
CMS counts 220 Medicare patients who saw Dr. Willison in 2024, with an average age of 78.
Is Dr. Kristen Willison board certified?
Yes. Dr. Willison is board certified in family medicine by the American Board of Family Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Kristen Willison bill to Medicare?
In 2024, Dr. Willison's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and medicare service (G0439).
Where did Dr. Kristen Willison go to medical school?
Dr. Willison graduated from UNR Med in 1988.
What drugs does Dr. Kristen Willison prescribe most?
In 2024 Medicare Part D data, Dr. Willison's most prescribed drugs by claims were Levothyroxine Sodium, Atorvastatin Calcium and Amlodipine Besylate.
Has Dr. Kristen Willison received payments from drug or device companies?
CMS Open Payments shows $5,459 in general payments to Dr. Willison from 34 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Kristen Willison been practicing?
Dr. Willison graduated from medical school in 1988, 38 years ago.
What insurance does Dr. Kristen Willison accept?
Dr. Willison is in network with 14 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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