Cecillia Tsao, MD
NPI 1821101767 · Endocrinology, Diabetes & Metabolism Physician · Washington, DC
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cecillia Tsao, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Washington, DC (NPI 1821101767).
Provider details
- NPI number
- 1821101767
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD034412 (DC)
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
20 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
81 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 81 | $147 |
Typical Medicare-allowed amounts for these services range $147–$147 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 118 | 37 |
| Metformin Hcl | 87 | 25 |
| Semaglutidebrand: Ozempic | 79 | 20 |
| Amlodipine Besylate | 70 | 23 |
| Gabapentin | 54 | 13 |
| Levothyroxine Sodium | 52 | 17 |
| Empagliflozin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-16
- Last updated
- 2019-01-18
Frequently asked questions
- What is Cecillia Tsao's NPI number?
- Cecillia Tsao's National Provider Identifier (NPI) is 1821101767, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cecillia Tsao's specialty?
- Cecillia Tsao is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Cecillia Tsao located?
- Cecillia Tsao's practice location on file with NPPES is 128 M St Nw, Washington, DC 20001-1205.
- What is Cecillia Tsao's phone number?
- The practice phone number listed in the NPPES registry for Cecillia Tsao is (202) 854-3840.
- Does Cecillia Tsao accept Medicare?
- Cecillia Tsao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cecillia Tsao's NPI active?
- Yes — Cecillia Tsao's NPI (1821101767) is active in the NPPES registry as of the last update on 2019-01-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.