Colleen Delaney, MD
Obstetrics & Gynecology Physician · Old Greenwich, CT
Colleen Delaney, MD is an obstetrics & gynecology physician with a practice address in Old Greenwich, Connecticut, and NPI 1013470129, issued on Apr 8, 2019. Check the license (Connecticut 75738, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Colleen Delaney
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 75738 CT
Self-reported in NPPES; status is on the state search - Practice location
- 1455 E Putnam Ave Ste 1, Old Greenwich, CT 06870
- Phone
- (036) 373-3372
- Enumerated
- Apr 8, 2019
- Record last updated
- Feb 22, 2024
- Fax
- (203) 637-3307
- Medicare enrollment
- Enrolled (PECOS I20230831002122); accepts Medicare assignment
- Medical or professional school
- Drexel University College Of Medicine, 2019
- Entity
- Type 1 · individual
Also registered at 1455 E Putnam Ave Ste 1
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lyudmila Ganatra, DOObstetrics & Gynecology Physician1366939977
- Jennifer Gonzalez, APRNWomen's Health Nurse Practitioner1194447318
- Elana Peck, MDObstetrics & Gynecology Physician1043669955
Verify Colleen Delaney in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 75738Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
99 Medicare Part D claims for 39 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Estradiol19 claims
- Progesterone11 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
- Stamford Health Medical Group IncOld Greenwich, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
4 obstetrics & gynecology physician records list a practice address in Old Greenwich
They are 4 of the 161 NPPES records with a practice address in Old Greenwich, and 707 obstetrics & gynecology physician records in Connecticut.
All 4 in Old Greenwich → All 707 in Connecticut → Every provider in Old Greenwich →
Other obstetrics & gynecology physician records in Connecticut
- Anne Abbate, MDBridgeport, CT1497323562
- Roxanne Abder, MDTrumbull, CT1790840809
- Patricia Abruna, M.D.Fairfield, CT1023246832
- Ami Acharya, M.D.Hamden, CT1437131760
- Marie Achong, M.D.Hartford, CT1700806213
- Elizabeth Ackley, M.D.New Haven, CT1316474091
- Sharon Adler, MDBristol, CT1235148438
- Chaarushi Ahuja, MDNew Haven, CT1851965347
- Sarp Aksel, M.D.Stamford, CT1245611441
- Roa Alammari, MDMansfield Center, CT1861782807
Common questions
What is Colleen Delaney, MD's NPI number?
Colleen Delaney, MD's National Provider Identifier (NPI) is 1013470129, issued on Apr 8, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Colleen Delaney, MD located?
The NPPES record lists a practice address at 1455 E Putnam Ave Ste 1, Old Greenwich, CT, 06870. Phone: (036) 373-3372. Providers update this record themselves, so call before visiting.
How can I verify Colleen Delaney, MD's license?
NPPES lists Connecticut license number 75738, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Colleen Delaney, MD prescribe under Medicare Part D?
In 2024, Colleen Delaney, MD had 99 Medicare Part D claims for 39 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.