Ann Callahan, MD
Psychiatry Physician · Darien, CT
Ann Callahan, MD is a psychiatry physician with a practice address in Darien, Connecticut, and NPI 1144343328, issued on Apr 10, 2007. Check the license (Connecticut 039508, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Ann Callahan
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 039508 CT
Self-reported in NPPES; status is on the state search - Practice location
- 10 Corbin Dr, Darien, CT 06820
- Phone
- (203) 655-0002
- Enumerated
- Apr 10, 2007
- Entity
- Type 1 · individual
Also registered at 10 Corbin Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Patricia Ford, LCACD, CCDPMental Health Counselor1700048162
Verify Ann Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 039508Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
64% more Medicare Part D claims than the average psychiatry physician in 2024
1,657 Medicare Part D claims for 112 beneficiaries, against an average of 1,010 among the 32,287 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Venlafaxine Hcl Er141 claims
- Fluoxetine Hcl112 claims
- Duloxetine Hcl95 claims
- Lorazepam92 claims
- Clonazepam91 claims
- Aripiprazole89 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.
Industry payments in 2024: $316.59
4 payments, mostly food and beverage; the largest payer was Axsome Therapeutics, Inc.. The 12,691 providers of this specialty with any payment received $4,902.45 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Psychiatry Physician providers in Connecticut
There are 1,096 psychiatry physician records in Connecticut.
Other psychiatry physician records in Connecticut
- Enenge A'Bodjedi, MDStamford, CT1952310666
- Chadi Abdallah, M.D.West Haven, CT1851591820
- Sarah AbdallahNew Haven, CT1740800952
- Elie AbdelnourNew Haven, CT1790346070
- Jessica Abellard, PSYCHIATRISTNew Haven, CT1881906139
- Irene Abramovich, M.D.West Hartford, CT1407864887
- Linus Abrams, M.D.Greenwich, CT1073675922
- Tia Maria Acosta, M.D.Willimantic, CT1679582167
- Bellanirys Acosta Arias, MDNew Haven, CT1063040293
- Michael Adusei, M.D.Stamford, CT1043560287
Common questions
What is Ann Callahan, MD's NPI number?
Ann Callahan, MD's National Provider Identifier (NPI) is 1144343328, issued on Apr 10, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ann Callahan, MD located?
The NPPES record lists a practice address at 10 Corbin Dr, Darien, CT, 06820. Phone: (203) 655-0002. Providers update this record themselves, so call before visiting.
How can I verify Ann Callahan, MD's license?
NPPES lists Connecticut license number 039508, 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 Ann Callahan, MD prescribe under Medicare Part D?
In 2024, Ann Callahan, MD had 1,657 Medicare Part D claims for 112 beneficiaries; the average among psychiatry physician prescribers was 1,010. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.