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DR. CHASEN J GREIG M.D.
NPI 1649513466
Surgery in Hartford, CT

Active since March 29, 2013PECOS EnrolledAccepts Medicare Assignment
114 WOODLAND ST, HARTFORD, CT 06105(860) 714-5237 Get Directions Write a Review

NPPES record last updated: July 16, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 16, 2021, Apr 10, 2020 (2 updates tracked since 2020).

About Dr. Chasen J Greig M.d. NPPES

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

DR. CHASEN J GREIG M.D. (NPI 1649513466) is an individual surgery provider in Hartford, Connecticut, licensed in Connecticut (69152) and active in the NPI registry since March 2013. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Temple University School Of Medicine (2013).

NPPES Registry Identity

NPI1649513466
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameDR. CHASEN J GREIGCredential: M.D.
Location Address114 WOODLAND STHartford, CT 06105-1208
Mailing Address1000 Asylum Ave Ste 4302West Hartford, CT 06105-1704 · (860) 713-5237
Phone(860) 714-5237
Sole ProprietorYes
Medical School CMSTemple University School Of MedicineGraduated 2013
Enumeration DateMarch 29, 2013
Last NPPES UpdateJuly 16, 20212 updates tracked since enumeration
NPPES CertifiedJuly 16, 2021
✔ NPI 1649513466 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in CT · 69152
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
114 WOODLAND ST, Hartford, CT 06105
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1333 City Blvd West Ste 1600Orange, CA 92868 · Phone (714) 456-7890
Location 2759 Chestnut StSpringfield, MA 01199-1001 · Phone (413) 794-0000

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.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

Dr. Chasen J Greig M.d. 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 ID2961638861
PECOS Enrollment IDI20211018002004
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 Chasen Greig reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Trinity Health Of New England Provider Network Organization Inc
Same address
Internal Medicine
114 WOODLAND ST, SAINT FRANCIS MEDICAL GROUP INC.
Hartford, CT 06105
  • Reassigned Medicare billing, Connecticut enrollment
  • 1,186 clinicians in this Medicare group
NPI 1003882812 (860) 714-1325

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 5

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
105 services75 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
64 services63 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
53 services35 patients
Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
14 services14 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06105 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
$93.86 typical visit price
range $60.82 – $183.10
Typical copayment $23.46 (range $15.20 – $45.77)
Most-billed visit code 99203
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 20

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

GAGANDEEP SINGH MD
Hospitalist
114 WOODLAND ST
HARTFORD, CT 06105
Capitol Planning Region (860) 714-7446
MRS. BROOKE M P CHAVES APRN
Nurse Practitioner (Family)
114 WOODLAND ST
HARTFORD, CT 06105
Capitol Planning Region (860) 714-4680
JOCELYN CALABRO APRN
Nurse Practitioner (Adult Health)
114 WOODLAND ST
HARTFORD, CT 06105
Capitol Planning Region (860) 714-4000
SAINT FRANCIS HOSPITAL AND MEDICAL CENTER
Clinic/Center (Dental)
114 WOODLAND ST
HARTFORD, CT 06105
Capitol Planning Region (860) 714-4995
PHILLIP DENNEN MD
Anesthesiology
114 WOODLAND ST
HARTFORD, CT 06105
Capitol Planning Region (860) 714-6654
FRANK J SETTER MD
Anesthesiology
114 WOODLAND ST
HARTFORD, CT 06105
Capitol Planning Region (860) 714-6654
TRINITY HEALTH OF NEW ENGLAND PROVIDER NETWORK ORGANIZATION INC
Internal Medicine
114 WOODLAND ST, SAINT FRANCIS MEDICAL GROUP INC.
HARTFORD, CT 06105
Capitol Planning Region (860) 714-1325
CATHERINE ANN CHAKAR-IYENGAR CRNA
Nurse Anesthetist, Certified Registered
114 WOODLAND ST, WOODLAND ANESTHESIOLOGY ASSOCIATES PC
HARTFORD, CT 06105
Capitol Planning Region (860) 614-6654

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 Chasen Greig's NPI number?

The NPI number for Chasen Greig is 1649513466. It was assigned to this individual provider in the NPPES registry on March 29, 2013.

Where is Chasen Greig located?

Chasen Greig practices at 114 Woodland St, Hartford, CT 06105. The listed phone number is (860) 714-5237.

What is Chasen Greig's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Chasen Greig enrolled in Medicare?

Yes. Chasen Greig 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 organization bills Medicare for Chasen Greig's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Chasen Greig reassigns Medicare benefits to Trinity Health Of New England Provider Network Organization Inc (Hartford, 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 Chasen Greig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Chasen Greig accept?

Health plans from Anthem Blue Cross and Blue Shield list Chasen Greig 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.

When was this NPI record last updated?

The NPPES record for Chasen Greig was last updated on July 16, 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.