Cecillia Tsao, MD
Endocrinology, Diabetes & Metabolism Physician · Washington, DC
Cecillia Tsao, MD is an endocrinology, diabetes & metabolism physician with a practice address in Washington, District of Columbia, and NPI 1821101767, issued on Aug 16, 2006. Check the license (District of Columbia MD034412, as entered in NPPES) on the District of Columbia Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Cecillia Tsao
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- MD034412 DC
Self-reported in NPPES; status is on the state search - Practice location
- 128 M St NW, Washington, DC 20001
- Phone
- (202) 854-3840
- Enumerated
- Aug 16, 2006
- Record last updated
- Jan 18, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (202) 854-3854
- Medicaid IDs
- 035300800 DC
410695400 MD - Medicare enrollment
- Enrolled (PECOS I20040402000862); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 1988
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 61 in District of Columbia → Look up another NPI →
Also registered at 128 M St NW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yiesak AsfawFamily Nurse Practitioner1487019030
- Constance Oppong, NPFamily Nurse Practitioner1518743251
- Mary Stein, CFNPFamily Nurse Practitioner1902193030
Verify Cecillia Tsao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDistrict of Columbia Board of Medicine
Search for license MD034412Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,462 Medicare Part D claims for 100 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Atorvastatin Calcium118 claims
- Metformin Hcl87 claims
- Ozempic79 claims
- Amlodipine Besylate70 claims
- Gabapentin54 claims
- Levothyroxine Sodium52 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.
Bills Medicare through one group practice
- Providence Health Services IncWashington, DC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cecillia Tsao among 61 endocrinology, diabetes & metabolism physician records in District of Columbia
Cecillia Tsao, MD is one of 61 endocrinology, diabetes & metabolism physician records with a practice address in District of Columbia. 70% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated1988 · median 1998 among the 32 with a school on file
- Record last updated2019 · 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 207RE0101X and a District of Columbia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in District of Columbia
There are 61 endocrinology, diabetes & metabolism physician records in District of Columbia.
All 61 in District of Columbia → Every provider in Washington → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Michael Bryan, M.D.Washington, DC 200021407909898
- Julianna Barsony, M.D.Washington, DC 200071427297233
- Ioana Fat, MDWashington, DC 200071205082724
- Natasa Janicic-KahricWashington, DC 200071306845748
- Jacqueline JonklaasWashington, DC 200071285633636
- William KuenstnerWashington, DC 200071225615123
- Joseph VerbalisWashington, DC 200071194724047
- Monica Skarulis, M.D.Washington, DC 200081891067138
Common questions
What is Cecillia Tsao, MD's NPI number?
Cecillia Tsao, MD's National Provider Identifier (NPI) is 1821101767, issued on Aug 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cecillia Tsao, MD located?
The NPPES record lists a practice address at 128 M St NW, Washington, DC, 20001. Phone: (202) 854-3840. Providers update this record themselves, so call before visiting.
How can I verify Cecillia Tsao, MD's license?
NPPES lists District of Columbia license number MD034412, as entered by the provider. Search the District of Columbia Board of Medicine at https://dchealth.dc.gov/bomed. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cecillia Tsao, MD prescribe under Medicare Part D?
In 2024, Cecillia Tsao, MD had 1,462 Medicare Part D claims for 100 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
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.