Cynthia Kao, M.D.
NPI 1669635538 · Internal Medicine Physician · Encinitas, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cynthia Kao, M.D. is a Internal Medicine Physician provider in Encinitas, CA (NPI 1669635538).
Provider details
- NPI number
- 1669635538
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A103030 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
884 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 403 | $119 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 273 | $118 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 150 | $80 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 46 | $176 |
| Initial Hospital Care With Same-Day Admission and Discharge With High Level of Medical Decision Making, Per Day, If Using Time, at Least 85 Minutes99236 | 12 | $211 |
Typical Medicare-allowed amounts for these services range $80–$211 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefuroxime Axetilbrand: Cefuroxime | 27 | 26 |
| Amlodipine Besylate | 22 | 13 |
| Furosemide | 22 | 22 |
| Pantoprazole Sodium | 21 | 20 |
| Apixabanbrand: Eliquis | 16 | 15 |
| Metoprolol Succinate | 16 | 16 |
| Hydrocodone/Acetaminophen |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-07-09
- Last updated
- 2014-07-31
Frequently asked questions
- What is Cynthia Kao's NPI number?
- Cynthia Kao's National Provider Identifier (NPI) is 1669635538, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cynthia Kao's specialty?
- Cynthia Kao is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Cynthia Kao located?
- Cynthia Kao's practice location on file with NPPES is 354 Santa Fe Dr, Encinitas, CA 92024-5142.
- What is Cynthia Kao's phone number?
- The practice phone number listed in the NPPES registry for Cynthia Kao is (760) 230-2251.
- Does Cynthia Kao accept Medicare?
- Cynthia Kao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cynthia Kao's NPI active?
- Yes — Cynthia Kao's NPI (1669635538) is active in the NPPES registry as of the last update on 2014-07-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.