Annie S. Liau, MD
Obstetrics & Gynecology Physician · Cambridge, MA
Annie S. Liau, MD is an obstetrics & gynecology physician with a practice address in Cambridge, Massachusetts, and NPI 1366423717, issued on Nov 10, 2005. Check the license (Massachusetts 46460, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Annie S. Liau
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 46460 MA
Self-reported in NPPES; status is on the state search - Practice location
- 77 Massachusetts Ave, Cambridge, MA 02139
- Phone
- (617) 253-1315
- Enumerated
- Nov 10, 2005
- Record last updated
- Feb 9, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (617) 258-0454
- Medicaid ID
- 6189946 MA
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,127 in Massachusetts → Look up another NPI →
Also registered at 77 Massachusetts Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Annie S. Liau in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 46460Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
76 Medicare Part D claims for 30 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 32% of claims.
Most prescribed
- Estradiol33 claims
- Estring17 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.
Annie S. Liau among 1,127 obstetrics & gynecology physician records in Massachusetts
Annie S. Liau, MD is one of 1,127 obstetrics & gynecology physician records with a practice address in Massachusetts. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2011 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Massachusetts
There are 1,127 obstetrics & gynecology physician records in Massachusetts.
All 1,127 in Massachusetts → Every provider in Cambridge → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Robert Berry, M.D.Cambridge, MA 021391548241672
- Anita Chanana, MDCambridge, MA 021391932669769
- Ana Domingues, M.D.Cambridge, MA 021391356490908
- Melissa Ethier, M.D.Cambridge, MA 021391255396727
- Kathleen Forest Harney, M.D.Cambridge, MA 021391003926411
- Latoya Jackson, M.D.Cambridge, MA 021391023301066
- Jennifer Retsinas, MDCambridge, MA 021391639282171
- Tara Singh, M.D.Cambridge, MA 021391629206347
Common questions
What is Annie S. Liau, MD's NPI number?
Annie S. Liau, MD's National Provider Identifier (NPI) is 1366423717, issued on Nov 10, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Annie S. Liau, MD located?
The NPPES record lists a practice address at 77 Massachusetts Ave, Cambridge, MA, 02139. Phone: (617) 253-1315. Providers update this record themselves, so call before visiting.
How can I verify Annie S. Liau, MD's license?
NPPES lists Massachusetts license number 46460, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Annie S. Liau, MD prescribe under Medicare Part D?
In 2024, Annie S. Liau, MD had 76 Medicare Part D claims for 30 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.