Cindy Lien, M.D.
Internal Medicine Physician · Boston, MA
Cindy Lien, M.D. is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1326095571, issued on May 30, 2006. Check the license (Massachusetts 223580, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Cindy Lien
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 223580 MA
Self-reported in NPPES; status is on the state search - Practice location
- 330 Brookline Ave,, Boston, MA 02215
- Phone
- (617) 754-4677
- Enumerated
- May 30, 2006
- Record last updated
- Jul 13, 2026
- Medicare enrollment
- Enrolled (PECOS I20050916000834); accepts Medicare assignment
- Medical or professional school
- Washington University School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 330 Brookline Ave,
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicole Chappell, M.D.Gynecologic Oncology Physician1205010980
Verify Cindy Lien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 223580Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cindy Lien among 6,825 internal medicine physician records in Massachusetts
Cindy Lien, M.D. is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2002 · median 2004 among the 4,103 with a school on file
- Record last updated2026 · 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 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,320 internal medicine physician records list a practice address in Boston
They are 2,320 of the 41,865 NPPES records with a practice address in Boston, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Boston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Stephen Boswell, M.D.Boston, MA 022151477541217
- Jennifer Cluett, MDBoston, MA 022151962491183
- Jan Cook, M.D.Boston, MA 022151437152139
- Rachel Freedman, M.D.Boston, MA 022151942297189
- Joseph Gesmundo, MDBoston, MA 022151891785069
- Alex Gonzalez, MD, MPHBoston, MA 022151134101629
- Scott Harris, MDBoston, MA 022151871581694
- Joseph Li, M.D.Boston, MA 022151043209380
Common questions
What is Cindy Lien, M.D.'s NPI number?
Cindy Lien, M.D.'s National Provider Identifier (NPI) is 1326095571, issued on May 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cindy Lien, M.D. located?
The NPPES record lists a practice address at 330 Brookline Ave,, Boston, MA, 02215. Phone: (617) 754-4677. Providers update this record themselves, so call before visiting.
How can I verify Cindy Lien, M.D.'s license?
NPPES lists Massachusetts license number 223580, 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.
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.