Karen Khoo, MD
NPI 1629031430 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Khoo, MD is a Internal Medicine Physician provider in San Francisco, CA (NPI 1629031430).
Provider details
- NPI number
- 1629031430
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 00G64432 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,415 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 439 | $109 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 278 | $153 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 176 | $156 |
| Advance Care Planning, First 30 Minutes99497 | 157 | $94 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 145 | $17 |
| Administration of Influenza Virus VaccineG0008 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 68 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 490 | 137 |
| Amlodipine Besylate | 301 | 86 |
| Losartan Potassium | 203 | 63 |
| Levothyroxine Sodium | 166 | 40 |
| Metformin Hcl | 131 | 35 |
| Hydrochlorothiazide | 92 | 27 |
| Alendronate Sodium | 82 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$444 across 12 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-11
- Last updated
- 2011-07-14
Frequently asked questions
- What is Karen Khoo's NPI number?
- Karen Khoo's National Provider Identifier (NPI) is 1629031430, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Khoo's specialty?
- Karen Khoo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Khoo located?
- Karen Khoo's practice location on file with NPPES is 4322 Geary Boulevard, San Francisco, CA 94118-3004.
- What is Karen Khoo's phone number?
- The practice phone number listed in the NPPES registry for Karen Khoo is (415) 221-3200.
- Does Karen Khoo accept Medicare?
- Karen Khoo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Khoo's NPI active?
- Yes — Karen Khoo's NPI (1629031430) is active in the NPPES registry as of the last update on 2011-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.