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Karen L Darkenwald, OD

Optometry · Santa Clara

NPI 1124177183

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
Not verified
Not the same as out of network.
Office
1

Offices

1 location · Permanente Medical Group Inc · 10,928 clinicians in this group

Looking this up.

Plan participation

Not verified

We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Dr. Darkenwald’s office at (408) 851-1000 to ask if they take your plan before you enroll.

Medicaid work

$27,257 in 2024

Medicaid paid $27,257 for 727 billed services this clinician did in 2024, up to 59 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.

Largest Medicaid services in 2024
Short return visit (20+ min)308$20,973
DETERMINATION REFRACTIVE STATE419$6,284
Medicaid work by year
2024727259$27,257
2023924662$23,493
2022575544$9,188
2021332227$5,820
2020209227$3,440
2019571351$381
2018574341$0
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
Short return visit (20+ min)309$17,579
DETERMINATION REFRACTIVE STATE446$5,559
OFFICE/OUTPATIENT NEW SF MDM 15 MINUTES16$355
Frames, purchases76$0
Spherocylinder, single vision, plano to plus or minus 4.00d sphere, .12 to 2.00d cylinder, per lens21$0
Anti-reflective coating, per lens56$0

2022

Largest Medicaid services in 2022
Short return visit (20+ min)212$7,110
DETERMINATION REFRACTIVE STATE263$2,078
Frames, purchases53$0
Spherocylinder, single vision, plano to plus or minus 4.00d sphere, .12 to 2.00d cylinder, per lens23$0
Anti-reflective coating, per lens24$0

2021

Largest Medicaid services in 2021
Short return visit (20+ min)154$4,468
DETERMINATION REFRACTIVE STATE178$1,352

2020

Largest Medicaid services in 2020
Short return visit (20+ min)78$2,360
DETERMINATION REFRACTIVE STATE131$1,080

2019

Largest Medicaid services in 2019
Short return visit (20+ min)230$270
DETERMINATION REFRACTIVE STATE316$111
OFFICE/OUTPATIENT NEW SF MDM 15 MINUTES25$0

2018

Largest Medicaid services in 2018
DETERMINATION REFRACTIVE STATE318$0
OFFICE/OUTPATIENT NEW SF MDM 15 MINUTES28$0
Short return visit (20+ min)228$0

Drugs they prescribed that Part D paid

$3,333

Pharmacies billed $3,333 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 73) in 2024. At or below the middle of the specialty; the typical optometry clinician is at 0%.

46 generic and 27 brand-name prescriptions · $3,333 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.

Largest Part D drug costs
Cyclosporine12$2,634$105
Erythromycin15$291$13
Neomycin-Polymyxin-Dexameth16$198$12

Year by year

Part D prescribing by year
202473480% (0)37%$3,333
2023121590% (0)23%$6,684
202259380% (0)None$2,758
202158280% (0)21%$8,456
202079300% (0)22%$8,169
2019150840% (0)22%$12,093
2018168930% (0)13%$12,506
2017136800% (0)12%$10,095
201677440% (0)22%$8,859
201570530% (0)19%$6,506
201480590% (0)None$7,012
201384550% (0)18%$5,996

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

See the drugs prescribed each year

2023: 3 drugs

Part D drugs prescribed in 2023
Cyclosporine22$2,850$130
Olopatadine52$1,088$21
Erythromycin28$421$15

2022: 2 drugs

Part D drugs prescribed in 2022
Olopatadine17$323$19
Erythromycin15$210$14

2021: 3 drugs

Part D drugs prescribed in 2021
Cequa12$6,363$530
Olopatadine19$1,419$75
Neomycin-Polymyxin-Dexameth11$133$12

2020: 3 drugs

Part D drugs prescribed in 2020
Restasis13$5,092$392
Olopatadine29$650$22
Erythromycin15$306$20

2019: 4 drugs

Part D drugs prescribed in 2019
Restasis19$7,745$408
Olopatadine49$1,386$28
Erythromycin35$762$22
Neomycin-Polymyxin-Dexameth20$349$17

2018: 5 drugs

Part D drugs prescribed in 2018
Restasis19$7,910$416
Bacitracin22$2,544$116
Erythromycin48$828$17
Olopatadine51$682$13
Neomycin-Polymyxin-Dexameth14$264$19

2017: 5 drugs

Part D drugs prescribed in 2017
Restasis11$5,415$492
Bacitracin22$2,588$118
Olopatadine45$720$16
Erythromycin35$609$17
Neomycin-Polymyxin-Dexameth12$224$19

2016: 2 drugs

Part D drugs prescribed in 2016
Restasis16$6,874$430
Erythromycin31$539$17

2015: 3 drugs

Part D drugs prescribed in 2015
Restasis11$4,319$393
Bacitracin15$1,236$82
Erythromycin34$608$18

2014: 3 drugs

Part D drugs prescribed in 2014
Restasis11$4,028$366
Bacitracin29$2,109$73
Erythromycin24$471$20

2013: 3 drugs

Part D drugs prescribed in 2013
Bacitracin24$1,489$62
Erythromycin24$464$19
Neomycin-Polymyxin-Dexameth11$217$20

Professional record

NPI
1124177183
Licence
CA 8449T
Gender
Female
More record details
Sole proprietor
No
Taxonomy
Federal specialty code 152W00000X (152W00000X)
Mailing address
1650 Response Rd, Sacramento, CA, 95815
NPI first listed
2007-01-09
NPI last updated
2022-01-27
NPI record certified
2022-01-27

This is when the NPI record was last certified, not a medical board exam.

This office lists an electronic records connection.