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GREGORY OLSEN
NPI 1922460955
Pathology - Anatomic Pathology & Clinical Pathology in New Haven, CT

Active since March 29, 2016PECOS EnrolledAccepts Medicare Assignment
78.18/100
CMS Quality Rating
20 YORK ST, NEW HAVEN, CT 06510(203) 688-4242 Get Directions Write a Review

NPPES record last updated: July 21, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 21, 2021, Jun 19, 2020, Mar 29, 2016 (3 updates tracked since 2016).

About Gregory Olsen NPPES

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

GREGORY OLSEN (NPI 1922460955) is an individual anatomic pathology & clinical pathology provider in New Haven, Connecticut, licensed in Florida (ME151102) and active in the NPI registry since March 2016. He is enrolled in Medicare PECOS, is affiliated with Prisma Health Oconee Memorial Hospital, and maintains a secondary practice location in Gainesville.

NPPES Registry Identity

NPI1922460955
Entity TypeIndividualMale
Primary Taxonomy207ZP0102X
Provider Legal NameGREGORY OLSEN
Location Address20 YORK STNew Haven, CT 06510-3220
Mailing AddressPo Box 100275Gainesville, FL 32610-0275 · (352) 273-7839
Phone(203) 688-4242
Sole ProprietorNo
Medical School CMSMedical College Of Georgia School Of MedicineGraduated 2016
Enumeration DateMarch 29, 2016
Last NPPES UpdateJuly 21, 20213 updates tracked since enumeration
NPPES CertifiedJuly 21, 2021
✔ NPI 1922460955 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
License✔ Licensed in FL · ME151102
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
20 YORK ST, New Haven, CT 06510
Open in Google Maps ↗

Secondary Practice Location 1

Location 11600 SW Archer RdGainesville, FL 32610-3220 · Phone (352) 273-7839

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include BlueCross BlueShield of South Carolina.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gregory Olsen is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID840587580
PECOS Enrollment IDI20240220002968
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 Reassignments

2

Medicare enrollment records show Gregory Olsen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Pathology Associates Of Greenville PA
683 mi
Anatomic Pathology & Clinical Pathology
8 MEMORIAL MEDICAL CT, SUITE 1
Greenville, SC 29605
  • Reassigned Medicare billing, South Carolina enrollment
  • 39 clinicians in this Medicare group
NPI 1831151976 (864) 295-3492
Florida Clinical Practice Association Inc
962 mi
Surgery
1600 SW ARCHER RD
Gainesville, FL 32610
  • Reassigned Medicare billing, Florida enrollment
  • 3,324 clinicians in this Medicare group
NPI 1063463768 (352) 265-7922

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

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Protein measurement, serum 84165
A serum protein measurement is a blood test that determines the levels of proteins in your blood. It is used to evaluate your overall health, and diagnose nutritional problems, kidney disease, liver disease, or immune disorders.
404 services259 patients
Blood smear interpretation by physician with written report 85060
Blood smear interpretation is a lab test where your doctor examines a sample of your blood under a microscope. They look for abnormalities in your blood cells which can help diagnose various conditions. You'll receive a written report of the findings.
62 services56 patients
Hemoglobin analysis and measurement, electrophoresis 83020
Hemoglobin analysis and measurement, electrophoresis, is a lab test that separates and identifies proteins in your blood. It's used to diagnose conditions affecting red blood cells. It's a simple, painless procedure where a small blood sample is taken and analyzed.
13 services13 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Prisma Health Oconee Memorial Hospital

Acute Care Hospitals · Seneca, SC
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number420009
Location298 Memorial DrSeneca, SC 29672 · Oconee County
Emergency services Birthing friendly

Prisma Health Baptist Easley Hospital

Acute Care Hospitals · Easley, SC
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number420015
Location200 Fleetwood DriveEasley, SC 29640 · Pickens County
Emergency services

Prisma Health Greer Memorial Hospital

Acute Care Hospitals · Spartanburg, SC
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number420033
Location1413 John B White Sr Blvd Suite DSpartanburg, SC 29306 · Spartanburg County
Emergency services Birthing friendly

Prisma Health Hillcrest Hospital

Acute Care Hospitals · Simpsonville, SC
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number420037
Location741 South East Main StreetSimpsonville, SC 29681 · Greenville County
Emergency services

Prisma Health Greenville Memorial Hospital

Acute Care Hospitals · Greenville, SC
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number420078
Location701 Grove RoadGreenville, SC 29605 · Greenville County
Birthing friendly

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
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

78.18/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality72.54
Promoting Interoperability100
Improvement Activities40
Cost54.74

Other Providers at the Same Location NPPES 20

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

AUDREY P SENIOR APRN
Nurse Practitioner (Family)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-5860
DR. YEISID F FIGUEREDO M.D.
Pediatrics (Neonatal-Perinatal Medicine)
20 YORK ST, DEPT OF NEONATOLOGY
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-2320
YALE NEW HAVEN HOSPITAL
Durable Medical Equipment & Medical Supplies (Customized Equipment)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-2046
TAYLOR KINGSTON
Dietitian, Registered
20 YORK ST, FOOD AND NUTRITION EPB806
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-9185
DR. TRAVIS DANIEL BONTRAGER MD
Hospitalist
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-1734
TERESA JOSEPH D.O.
Internal Medicine (Nephrology)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 737-8894
MR. BRAD ST. MARTIN MD
Obstetrics & Gynecology
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-4242
BERNADETTE BIMONTE-HACKETT LCSW
Social Worker (Clinical)
20 YORK ST, SOCIAL WORK EP10-635
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-5161

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 Gregory Olsen's NPI number?

The NPI number for Gregory Olsen is 1922460955. It was assigned to this individual provider in the NPPES registry on March 29, 2016.

Where is Gregory Olsen located?

Gregory Olsen practices at 20 York St, New Haven, CT 06510. The listed phone number is (203) 688-4242.

What is Gregory Olsen's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Gregory Olsen enrolled in Medicare?

Yes. Gregory Olsen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Gregory Olsen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Olsen reassigns Medicare benefits to 2 organizations: Pathology Associates Of Greenville PA (Greenville, SC) and Florida Clinical Practice Association Inc (Gainesville, FL). Each 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 Gregory Olsen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Olsen accept?

Health plans from BlueCross BlueShield of South Carolina list Gregory Olsen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Gregory Olsen affiliated with any hospitals?

According to CMS data, Gregory Olsen is affiliated with Prisma Health Oconee Memorial Hospital, Prisma Health Baptist Easley Hospital, Prisma Health Greer Memorial Hospital, Prisma Health Hillcrest Hospital and Prisma Health Greenville Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Gregory Olsen was last updated on July 21, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.