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DR. NANCY DIAN OLSON M.D.
NPI 1003832049
Psychiatry & Neurology - Psychiatry in New Haven, CT

Active since July 14, 2006PECOS Enrolled
47 TRUMBULL ST, NEW HAVEN, CT 06510(203) 785-1898(203) 281-3707 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Nancy Dian Olson M.d. NPPES

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

DR. NANCY DIAN OLSON M.D. (NPI 1003832049) is an individual psychiatry provider in New Haven, Connecticut, licensed in Connecticut (030070) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1003832049
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameDR. NANCY DIAN OLSONCredential: M.D.
Location Address47 TRUMBULL STNew Haven, CT 06510-1004
Mailing Address5 Brookside DrHamden, CT 06517-1409 · (203) 785-1898 · Fax (203) 281-3707
Phone(203) 785-1898
Fax(203) 281-3707
Sole ProprietorYes
Enumeration DateJuly 14, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1003832049 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 · 030070
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.
47 TRUMBULL ST, New Haven, CT 06510
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Other Identifiers 1

Medicare UPIN308830CT

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Nancy Dian Olson M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Nancy Olson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mill Hill Medical Consultants Inc
1.0 mi
Hospitalist
20 YORK ST, CB 2041
New Haven, CT 06510
  • Reassigned Medicare billing, Connecticut enrollment
  • Medicare enrollment name: Northeast Medical Group Inc
  • 1,824 clinicians in this Medicare group
NPI 1952624769 (203) 688-4741

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06510 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.

DR. DEBORAH FRIED MD
Psychiatry & Neurology (Psychiatry)
47 TRUMBULL ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 789-2929

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 Nancy Olson's NPI number?

The NPI number for Nancy Olson is 1003832049. It was assigned to this individual provider in the NPPES registry on July 14, 2006.

Where is Nancy Olson located?

Nancy Olson practices at 47 Trumbull St, New Haven, CT 06510. The listed phone number is (203) 785-1898.

What is Nancy Olson's specialty?

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

Is Nancy Olson enrolled in Medicare?

Yes. Nancy Olson is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Nancy Olson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nancy Olson reassigns Medicare benefits to Mill Hill Medical Consultants Inc (New Haven, CT). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Nancy Olson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Nancy Olson was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.