Thao Thach O'Connor, C-FNP
Family Nurse Practitioner · Boston, MA
Thao Thach O'Connor, C-FNP is a family nurse practitioner with a practice address in Boston, Massachusetts, and NPI 1124312350, issued on Jun 6, 2011. Check the license (Massachusetts RN252917, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Thao Thach O'Connor
- Credential
- C-FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- RN252917 MA
Self-reported in NPPES; status is on the state search - Practice location
- 50 Staniford St, Boston, MA 02114
- Phone
- (617) 726-8722
- Enumerated
- Jun 6, 2011
- Record last updated
- May 28, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (617) 726-6781
- Medicare enrollment
- Enrolled (PECOS I20110819000510); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,724 in Massachusetts → Look up another NPI →
Also registered at 50 Staniford St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Ahn, M.D.Child & Adolescent Psychiatry Physician1952429532
- Robert Amrhein, M.D.Specialist1972676781
- Richard Anderson, MDDermatology Physician1700869831
- Anjum Ansari, D.M.D.General Practice Dentistry1578783346
- Alison Avram, M.D.Dermatology Physician1083721781
- Mathew Avram, MDDermatology Physician1295717296
Verify Thao Thach O'Connor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN252917Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average family nurse practitioner in 2024
497 Medicare Part D claims for 172 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 65% of claims.
Most prescribed
- Ozempic59 claims
- Trulicity47 claims
- Lantus Solostar44 claims
- Metformin Hcl40 claims
- Mounjaro29 claims
- Metformin Hcl Er28 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
- Massachusetts General Physicians Organization IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thao Thach O'Connor among 4,724 family nurse practitioner records in Massachusetts
Thao Thach O'Connor, C-FNP is one of 4,724 family nurse practitioner records with a practice address in Massachusetts. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 20% of them.
- NPI issued2011 · 20% of these records are older, 77% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2008 · median 2019 among the 2,704 with a school on file
- Record last updated2014 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
938 family nurse practitioner records list a practice address in Boston
They are 938 of the 41,865 NPPES records with a practice address in Boston, and 4,724 family nurse practitioner records in Massachusetts.
All 4,724 in Massachusetts → Every provider in Boston → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Maryellen Belisle, APRNBoston, MA 021141508892001
- Kendra Cull, FNPBoston, MA 021141780665612
- Irene Gutowski, NPBoston, MA 021141134271893
- Angela Hurley, NPBoston, MA 021141417001769
- Peggy Leland, NPBoston, MA 021141790883106
- Mary Nichols, C-FNPBoston, MA 021141548312721
- Heather Parker, NPBoston, MA 021141518018423
- Maria Roche, NPBoston, MA 021141447307707
Common questions
What is Thao Thach O'Connor, C-FNP's NPI number?
Thao Thach O'Connor, C-FNP's National Provider Identifier (NPI) is 1124312350, issued on Jun 6, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Thao Thach O'Connor, C-FNP located?
The NPPES record lists a practice address at 50 Staniford St, Boston, MA, 02114. Phone: (617) 726-8722. Providers update this record themselves, so call before visiting.
How can I verify Thao Thach O'Connor, C-FNP's license?
NPPES lists Massachusetts license number RN252917, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Thao Thach O'Connor, C-FNP prescribe under Medicare Part D?
In 2024, Thao Thach O'Connor, C-FNP had 497 Medicare Part D claims for 172 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.