Nancy Dian Olson, M.D.
Psychiatry Physician · New Haven, CT
Nancy Dian Olson, M.D. is a psychiatry physician with a practice address in New Haven, Connecticut, and NPI 1003832049, issued on Jul 14, 2006. Check the license (Connecticut 030070, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Nancy Dian Olson
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 030070 CT
Self-reported in NPPES; status is on the state search - Practice location
- 47 Trumbull St, New Haven, CT 06510
- Phone
- (203) 785-1898
- Enumerated
- Jul 14, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (203) 281-3707
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 1,174 in Connecticut → Look up another NPI →
Also registered at 47 Trumbull St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Deborah Fried, MDPsychiatry Physician1619076734
Verify Nancy Dian Olson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 030070Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average psychiatry physician in 2024
93 Medicare Part D claims for 12 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Lamotrigine11 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.
Nancy Dian Olson among 1,174 psychiatry physician records in Connecticut
Nancy Dian Olson, M.D. is one of 1,174 psychiatry physician records with a practice address in Connecticut. 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 5% of them.
- NPI issued2006 · 5% of these records are older, 60% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 43% of these records are
- Record last updated2007 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
285 psychiatry physician records list a practice address in New Haven
They are 285 of the 9,793 NPPES records with a practice address in New Haven, and 1,174 psychiatry physician records in Connecticut.
All 1,174 in Connecticut → Every provider in New Haven → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Eric Berger, MDNew Haven, CT 065101407888746
- Joseph CheckNew Haven, CT 065101023121985
- Paul Desan, MDNew Haven, CT 065101689662686
- Tsilia Glinberg, MDNew Haven, CT 065101497736060
- David Greenfeld, M.D.New Haven, CT 065101851317366
- Frank Ninivaggi, MDNew Haven, CT 065101609880434
- Anna Ostrovskaya, M. D.New Haven, CT 065101073556841
- Pamela Petersen-Crair, MDNew Haven, CT 065101023127271
Common questions
What is Nancy Dian Olson, M.D.'s NPI number?
Nancy Dian Olson, M.D.'s National Provider Identifier (NPI) is 1003832049, issued on Jul 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nancy Dian Olson, M.D. located?
The NPPES record lists a practice address at 47 Trumbull St, New Haven, CT, 06510. Phone: (203) 785-1898. Providers update this record themselves, so call before visiting.
How can I verify Nancy Dian Olson, M.D.'s license?
NPPES lists Connecticut license number 030070, 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 Nancy Dian Olson, M.D. prescribe under Medicare Part D?
In 2024, Nancy Dian Olson, M.D. had 93 Medicare Part D claims for 12 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.