Cristy Ku, M.D., PH.D.
Ophthalmology Physician · Sacramento, CA
Cristy Ku, M.D., PH.D. is an ophthalmology physician with a practice address in Sacramento, California, and NPI 1235592361, issued on Apr 5, 2016. Check the license (California A171814, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Cristy Ku
- Credential
- M.D., PH.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- A171814 CA
U6002 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4860 Y St Ste 2400, Sacramento, CA 95817
- Phone
- (503) 494-8386
- Enumerated
- Apr 5, 2016
- Record last updated
- Sep 26, 2023
- Medicare enrollment
- Enrolled (PECOS I20231011000573); accepts Medicare assignment
- Medical or professional school
- West Virginia University School Of Medicine, 2015
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 4860 Y St Ste 2400
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aparna Ajjarapu, MDStudent in an Organized Health Care Education/Training Program1962253070
- James Brandt, M.D.Ophthalmology Physician1578544136
- Evan Chang, MDOphthalmology Physician1457856759
- Nicholas Chartrand, MDStudent in an Organized Health Care Education/Training Program1912712696
- Andrew ChenStudent in an Organized Health Care Education/Training Program1023694981
- David Chu, MDOphthalmology Physician1427190578
Verify Cristy Ku in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A171814Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average ophthalmology physician in 2024
147 Medicare Part D claims for 40 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 35% of claims.
Most prescribed
- Prednisolone Acetate41 claims
- Moxifloxacin20 claims
- Ketorolac Tromethamine18 claims
- Atropine Sulfate15 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 84.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $396.01
7 payments; by number, the most common kind was food and beverage; the largest payer was Spark Therapeutics, Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Baylor College OF MedicineHouston, TX
- Baylor College OF MedicineHouston, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cristy Ku among 2,899 ophthalmology physician records in California
Cristy Ku, M.D., PH.D. is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 86% of them.
- NPI issued2016 · 86% of these records are older, 12% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2015 · median 2001 among the 1,907 with a school on file
- Record last updated2023 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Sacramento → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- James Brandt, M.D.Sacramento, CA 958171578544136
- Jeffrey Caspar, M.D.Sacramento, CA 958171609850452
- David Chu, MDSacramento, CA 958171427190578
- John Keltner, M.D.Sacramento, CA 958171659353522
- Esther Kim, M.D.Sacramento, CA 958171740265073
- Michele Lim, M.D.Sacramento, CA 958171962487025
- Lily Lin, M.D.Sacramento, CA 958171306908108
- William Lloyd, M.D.Sacramento, CA 958171710961479
Common questions
What is Cristy Ku, M.D., PH.D.'s NPI number?
Cristy Ku, M.D., PH.D.'s National Provider Identifier (NPI) is 1235592361, issued on Apr 5, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Cristy Ku, M.D., PH.D. located?
The NPPES record lists a practice address at 4860 Y St Ste 2400, Sacramento, CA, 95817. Phone: (503) 494-8386. Providers update this record themselves, so call before visiting.
How can I verify Cristy Ku, M.D., PH.D.'s license?
NPPES lists California license number A171814, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cristy Ku, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Cristy Ku, M.D., PH.D. had 147 Medicare Part D claims for 40 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Cristy Ku, M.D., PH.D.'s MIPS final score?
The 2023 MIPS final score is 84.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.