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ANN M CALLAHAN MD
NPI 1144343328
Psychiatry & Neurology - Psychiatry in Darien, CT

Active since April 10, 2007Opted out of Medicare · through Mar 8, 2028
10 CORBIN DR, SUITE 4, DARIEN, CT 06820(203) 655-0002(203) 655-0023 Get Directions Write a Review

NPPES record last updated: February 18, 2010. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Ann M Callahan Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ANN M CALLAHAN MD (NPI 1144343328) is an individual psychiatry provider in Darien, Connecticut, licensed in Connecticut (039508) and active in the NPI registry since April 2007. She has opted out of Medicare through March 8, 2028 and remains eligible to order and refer.

NPPES Registry Identity

NPI1144343328
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameANN M CALLAHANCredential: MD
Location Address10 CORBIN DR, SUITE 4Darien, CT 06820-5403
Mailing Address10 Corbin Dr, Suite 4Darien, CT 06820-5403 · (203) 655-0002 · Fax (203) 655-0023
Phone(203) 655-0002
Fax(203) 655-0023
Sole ProprietorNo
Enumeration DateApril 10, 2007
Last NPPES UpdateFebruary 18, 2010
✔ NPI 1144343328 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in CT · 039508
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
10 CORBIN DR, Darien, CT 06820
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Other Identifiers 1

Medicare UPINH50724CT

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Ann M Callahan Md has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from March 8, 2014 through March 8, 2028.

Opt-Out Effective DateMarch 8, 2014
Opt-Out In Effect ThroughMarch 8, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06820 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$183.10 typical visit price
range $60.82 – $183.10
Typical copayment $45.77 (range $15.20 – $45.77)
Most-billed visit code 99205
Established Patient
$75.55 typical visit price
range $19.76 – $149.26
Typical copayment $18.88 (range $4.94 – $37.31)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. PATRICIA DYMPNA FORD LCACD, CCDP
Counselor (Mental Health)
10 CORBIN DR, SUITE 4
DARIEN, CT 06820
Western Connecticut Planning Region (203) 662-1111

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ann Callahan's NPI number?

The NPI number for Ann Callahan is 1144343328. It was assigned to this individual provider in the NPPES registry on April 10, 2007.

Where is Ann Callahan located?

Ann Callahan practices at 10 Corbin Dr Suite 4, Darien, CT 06820. The listed phone number is (203) 655-0002.

What is Ann Callahan's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Ann Callahan enrolled in Medicare?

No. Ann Callahan has opted out of Medicare through March 8, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Ann Callahan was last updated on February 18, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.