Karen Khoo, MD
Internal Medicine Physician · San Francisco, CA
Karen Khoo, MD is an internal medicine physician with a practice address in San Francisco, California, and NPI 1629031430, issued on Apr 11, 2006. Check the license (California 00G64432, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Khoo
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 00G64432 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4322 Geary Boulevard, San Francisco, CA 94118
- Phone
- (415) 221-3200
- Enumerated
- Apr 11, 2006
- Record last updated
- Jul 14, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (415) 221-3201
- Medicaid ID
- 00G644320 CA
- Medicare enrollment
- Enrolled (PECOS I20100716000613); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Karen Khoo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 00G64432Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% more Medicare Part D claims than the average internal medicine physician in 2024
3,629 Medicare Part D claims for 363 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 40 claims were for opioids.
Most prescribed
- Atorvastatin Calcium490 claims
- Amlodipine Besylate301 claims
- Losartan Potassium203 claims
- Levothyroxine Sodium166 claims
- Metformin Hcl131 claims
- Hydrochlorothiazide92 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 MIPS final score for 2023 (Medicare payment program): 90.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $444.48
12 payments; by number, the most common kind was food and beverage; the largest payer was Noah Medical Corporation. The 50,334 providers of this specialty with any payment received $1,303.06 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 one group practice
- Sutter Bay Medical FoundationSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Khoo among 17,696 internal medicine physician records in California
Karen Khoo, MD is one of 17,696 internal medicine 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1987 · median 2004 among the 11,065 with a school on file
- Record last updated2011 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,318 internal medicine physician records list a practice address in San Francisco
They are 1,318 of the 38,143 NPPES records with a practice address in San Francisco, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Francisco → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nikola Bukurov, M.D.San Francisco, CA 941181861423279
- Lee Tat Chan, M.D.San Francisco, CA 941181992728414
- Randolph Chase, M.D.San Francisco, CA 941181063428225
- Catherine Collins, M.D.San Francisco, CA 941181346265790
- Robert Dobrow, MDSan Francisco, CA 941181356336051
- Joyce Hansen, M.D.San Francisco, CA 941181639190085
- Eric Kwok, M.D.San Francisco, CA 941181447231618
- Stephen Lee, M.D.San Francisco, CA 941181053327288
Common questions
What is Karen Khoo, MD's NPI number?
Karen Khoo, MD's National Provider Identifier (NPI) is 1629031430, issued on Apr 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen Khoo, MD located?
The NPPES record lists a practice address at 4322 Geary Boulevard, San Francisco, CA, 94118. Phone: (415) 221-3200. Providers update this record themselves, so call before visiting.
How can I verify Karen Khoo, MD's license?
NPPES lists California license number 00G64432, 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 Karen Khoo, MD prescribe under Medicare Part D?
In 2024, Karen Khoo, MD had 3,629 Medicare Part D claims for 363 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Karen Khoo, MD's MIPS final score?
The 2023 MIPS final score is 90.8 of 100. 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.