Kiho Woo, M.D.
NPI 1003091539 · Internal Medicine Physician · Fullerton, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kiho Woo, M.D. is a Internal Medicine Physician provider in Fullerton, CA (NPI 1003091539).
Provider details
- NPI number
- 1003091539
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A96349 (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
18 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
1,404 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 935 | $113 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 | 167 | $190 |
| Nursing Facility Discharge Management, More Than 30 Minutes99316 | 104 | $137 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 92 | $79 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 43 | $137 |
| Advance Care Planning, First 30 Minutes99497 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 119 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 415 | 90 |
| Atorvastatin Calcium | 308 | 118 |
| Levothyroxine Sodium | 298 | 89 |
| Furosemide | 246 | 88 |
| Potassium Chloride | 214 | 82 |
| Gabapentin | 192 | 63 |
| Metoprolol Tartrate | 173 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$24 across 1 record (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
- 2008-01-03
- Last updated
- 2019-12-02
Frequently asked questions
- What is Kiho Woo's NPI number?
- Kiho Woo's National Provider Identifier (NPI) is 1003091539, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kiho Woo's specialty?
- Kiho Woo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kiho Woo located?
- Kiho Woo's practice location on file with NPPES is 101 E. Valencia Dr., Fullerton, CA 92835-3809.
- What is Kiho Woo's phone number?
- The practice phone number listed in the NPPES registry for Kiho Woo is (714) 449-4800.
- Does Kiho Woo accept Medicare?
- Kiho Woo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kiho Woo's NPI active?
- Yes — Kiho Woo's NPI (1003091539) is active in the NPPES registry as of the last update on 2019-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.