Karen Williams, NP
Nurse Practitioner · Palo Alto
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- Not verified
- Not the same as out of network.
- Offices
- 4
Offices
4 locations · Sutter Bay Medical Foundation · Lakeland Regional Health Systems Inc
Plan participation
Not verified
We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Karen Williams’s office to ask if they take your plan before you enroll.
California Medical Board record
Licence A79295 · Cancelled
Licence status: Cancelled · since 2002 · Hamadan University of Medical Sciences and Health Services.
License has been voluntarily canceled, or the license has been expired for at least five years and has not been renewed. No practice is permitted.
Matched on the licence number without its letter prefix; check the name before relying on it.
No disciplinary actions, convictions, malpractice judgments or citations in this record.
Original Medicare doctor bills
$17,022
Medicare paid this office $17,022 for 103 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Return visit (30+ min) | 62 | $9,239 | $78 |
| Short return visit (20+ min) | 42 | $3,574 | $59 |
| Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | 33 | $1,280 | $21 |
| Blood test, lipids (cholesterol and triglycerides) | 22 | $407 | $13 |
| Blood test, comprehensive group of blood chemicals | 24 | $342 | $10 |
See all 7 services
| Return visit (30+ min) | 62 | $9,239 | $78 |
| Short return visit (20+ min) | 42 | $3,574 | $59 |
| Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | 33 | $1,280 | $21 |
| Blood test, lipids (cholesterol and triglycerides) | 22 | $407 | $13 |
| Blood test, comprehensive group of blood chemicals | 24 | $342 | $10 |
| Hemoglobin a1c level | 23 | $295 | $10 |
| Insertion of needle into vein for collection of blood sample | 28 | $274 | $8 |
Who their Medicare patients are
103 Original Medicare patients in 2024. Average age 70 · Women 66% · Also on Medicaid 14% · Health risk score 1.81. Above the middle of the specialty; the typical nurse practitioner clinician is at 1.42.
Conditions among them: High blood pressure 75% · Diabetes 72% · Chronic kidney disease 41% · Coronary heart disease 39% · Depression 28% · COPD 24% · Atrial fibrillation 23% · Heart failure 22% · Cancer 16%.
The office billed $64,675, Medicare allowed $21,520 and paid $17,022; for 405 services of 16 kinds.
Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.
Medicaid work
$5,604 in 2024
Medicaid paid $5,604 for 1,101 billed services this clinician did in 2024, up to 28 people in a month for one service.
Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.
| Return visit (30+ min) | 113 | $4,270 |
| Short return visit (20+ min) | 55 | $1,334 |
| Medication list documented in medical record (COA) | 147 | $0 |
| Review of all medications by a prescribing practitioner or clinical pharmacist (such as, prescriptions, OTCs, herbal therapies and supplements) documented in the medical record (COA) | 147 | $0 |
| BLOOD PRESSURE MEASURED | 193 | $0 |
| WEIGHT RECORDED | 182 | $0 |
| Most recent systolic blood pressure less than 130 mm Hg (DM) (HTN, CKD, CAD) | 95 | $0 |
| Most recent diastolic blood pressure less than 80 mm Hg (HTN, CKD, CAD) (DM) | 169 | $0 |
| 2024 | 1,101 | 8 | 28 | $5,604 |
Drugs they prescribed that Part D paid
$1,129,088
Pharmacies billed $1,129,088 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 0% of their Part D prescriptions (0 of 1,544) in 2024. At or below the middle of the specialty; the typical nurse practitioner clinician is at 0%.
276 generic and 1,091 brand-name prescriptions · $1,129,088 in drug cost.
Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.
| Ozempic | 282 | $444,042 | $1,575 |
| Jardiance | 91 | $112,128 | $1,232 |
| Mounjaro | 63 | $111,821 | $1,775 |
| Trulicity | 55 | $86,051 | $1,565 |
| Toujeo Max Solostar | 24 | $46,415 | $1,934 |
See all 32 drugs
| Ozempic | 282 | $444,042 | $1,575 |
| Jardiance | 91 | $112,128 | $1,232 |
| Mounjaro | 63 | $111,821 | $1,775 |
| Trulicity | 55 | $86,051 | $1,565 |
| Toujeo Max Solostar | 24 | $46,415 | $1,934 |
| Fiasp Flextouch | 25 | $33,904 | $1,356 |
| Farxiga | 26 | $27,649 | $1,063 |
| Basaglar Kwikpen U-100 | 22 | $22,128 | $1,006 |
| Gvoke Hypopen 2-Pack | 26 | $17,062 | $656 |
| Lantus Solostar | 96 | $17,017 | $177 |
| Tresiba Flextouch U-100 | 22 | $16,634 | $756 |
| Toujeo Solostar | 13 | $14,825 | $1,140 |
| Novolog Flexpen | 36 | $13,602 | $378 |
| Januvia | 14 | $12,330 | $881 |
| Humalog | 27 | $11,671 | $432 |
| Admelog Solostar | 13 | $8,813 | $678 |
| Insulin Lispro Kwikpen U-100 | 11 | $7,261 | $660 |
| Humalog Kwikpen U-100 | 24 | $6,854 | $286 |
| Admelog | 17 | $5,298 | $312 |
| Gvoke Hypopen 1-Pack | 12 | $5,013 | $418 |
| Synthroid | 23 | $3,605 | $157 |
| Nano 2nd Gen Pen Needle | 33 | $3,253 | $99 |
| Ultra-Fine Short Pen Needle | 27 | $2,001 | $74 |
| Ultra-Fine Mini Pen Needle | 24 | $1,705 | $71 |
| Metformin Hcl Er | 72 | $1,373 | $19 |
| Droplet Pen Needle | 15 | $1,345 | $90 |
| Levothyroxine | 132 | $1,313 | $10 |
| Insulin Lispro | 11 | $883 | $80 |
| Pregabalin | 19 | $531 | $28 |
| Metformin | 30 | $189 | $6 |
| Glipizide | 14 | $103 | $7 |
| Dexamethasone | 16 | $102 | $6 |
Money from drug and device companies
$893 in 2025
| 2025 | 6 | 10 | None | $893 |
| 2024 | 5 | 5 | None | $265 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Medtronic | Minimed 780g | $563 | 5 payments
|
| Sanofi-Aventis U.S. | Tzield | $118 | 1 payment
|
| Novo Nordisk | Ozempic | $111 | 1 payment
|
| Tandem Diabetes Care | T:Slim X2 Insulin Pump With Control-Iq | $43 | 1 payment
|
| Boston Scientific | General - Therapies | $42 | 1 payment
|
| Dexcom | Dexcom G6 Transmitter | $16 | 1 payment
|
See all 10 published payments
| Sanofi-Aventis U.S. | Meals · 2025-10-04 | Tzield | $118 |
| Dexcom | Meals · 2025-10-04 | Dexcom G6 Transmitter | $16 |
| Boston Scientific | Meals · 2025-06-25 | General - Therapies | $42 |
| Medtronic | Travel · 2025-05-02 | Minimed 780g | $313 |
| Tandem Diabetes Care | Meals · 2025-04-23 | T:Slim X2 Insulin Pump With Control-Iq | $43 |
| Novo Nordisk | Meals · 2025-04-10 | Ozempic | $111 |
| Medtronic | Travel · 2025-02-21 | None | $70 |
| Medtronic | Meals · 2025-02-21 | Minimed 780g | $51 |
| Medtronic | Meals · 2025-02-21 | Minimed 780g | $67 |
| Medtronic | Meals · 2025-02-21 | Minimed 780g | $62 |
See earlier years (2024)
2024: $265
| Corcept Therapeutics | Korlym | $98 | 1 payment
|
| Radius Health | Tymlos | $50 | 1 payment
|
| Medtronic | Minimed 780g | $44 | 1 payment
|
| Dexcom | Dexcom G6 Transmitter | $44 | 1 payment
|
| Tandem Diabetes Care | T:Slim X2 Insulin Pump With Control-Iq | $29 | 1 payment
|
Professional record
- NPI
- 1588082929
- Licence
- CA 767891, CA 79295, CA 95024541, FL APRN11024505California A79295: Cancelled
- Group
- Sutter Bay Medical Foundation · Lakeland Regional Health Systems Inc
- Video visits
- Lists video visits
- Gender
- Female
More record details
- Sole proprietor
- Yes
- Taxonomy
- Federal specialty code 363LF0000X (363LF0000X); Federal specialty code 163W00000X (163W00000X); Federal specialty code 163WC0400X (163WC0400X); Federal specialty code 163WC1500X (163WC1500X); Nurse practitioner (363L00000X); Federal specialty code 363LP2300X (363LP2300X)
- Mailing address
- Po Box 276950, Sacramento, CA, 95827
- NPI first listed
- 2014-04-02
- NPI last updated
- 2025-08-08
- NPI record certified
- 2025-08-08
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 815 Bay Ave, Capitola, CA, 95010 · 2120 Country Loop N, Lakeland, FL, 33811