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GARY KALAN M.D.
NPI 1861428831
Anesthesiology in Greenwich, CT

Active since June 23, 2006PECOS Enrolled
5 PERRYRIDGE RD, GREENWICH, CT 06830(203) 661-5330 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Gary Kalan M.d. NPPES

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

GARY KALAN M.D. (NPI 1861428831) is an individual anesthesiology provider in Greenwich, Connecticut, licensed in Connecticut (027826) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1861428831
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameGARY KALANCredential: M.D.
Location Address5 PERRYRIDGE RDGreenwich, CT 06830-4608
Mailing Address255 W Michigan AveJackson, MI 49201-2218 · (517) 787-6440 · Fax (517) 787-4146
Phone(203) 661-5330
Sole ProprietorNo
Enumeration DateJune 23, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1861428831 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CT · 027826
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
5 PERRYRIDGE RD, Greenwich, CT 06830
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gary Kalan 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 Reassignments

2

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

Amsurg Stamford Anesthesia LLC
5.4 mi
Anesthesiology
778 LONG RIDGE RD
Stamford, CT 06902
  • Reassigned Medicare billing, Connecticut enrollment
  • 33 clinicians in this Medicare group
NPI 1942622378 (203) 322-2400
Bridgeport Anesthesia Associates, P.C.
26 mi
Anesthesiology
267 GRANT ST
Bridgeport, CT 06610
  • Reassigned Medicare billing, Connecticut enrollment
  • 129 clinicians in this Medicare group
NPI 1174549257 (203) 384-3072

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

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.

Anesthesia for lens surgery 00142
Anesthesia for lens surgery involves administering medication to numb the eye area, ensuring you feel no pain during the procedure. This can be a local anesthetic (numbing only the eye area) or general (where you're asleep). It helps make the surgery comfortable and stress-free.
24 services24 patients

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.

ZARA NADIA ILAHI MD
Pediatrics (Neonatal-Perinatal Medicine)
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3000
MR. PAUL GREGORY LOFTUS MS
Physical Medicine & Rehabilitation
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3203
SARAH STAMPER M.D.
Student in an Organized Health Care Education/Training Program
5 PERRYRIDGE RD, MEDICAL EDUCATION
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3409
JUNE EVELYN JEON MD
Student in an Organized Health Care Education/Training Program
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3000
ARIANA DOMINICUS PA-C
Physician Assistant
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3000
ERIC LI-MING HUANG BSC, PHARMD
Pharmacist (Pharmacotherapy)
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3199
ROSEMARY PERLEY-KWAUK CRNA
Nurse Anesthetist, Certified Registered
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 661-5330
DR. FRANCISCO J BREA MD
Anesthesiology
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 661-5330

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 Gary Kalan's NPI number?

The NPI number for Gary Kalan is 1861428831. It was assigned to this individual provider in the NPPES registry on June 23, 2006.

Where is Gary Kalan located?

Gary Kalan practices at 5 Perryridge Rd, Greenwich, CT 06830. The listed phone number is (203) 661-5330.

What is Gary Kalan's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Gary Kalan enrolled in Medicare?

Yes. Gary Kalan is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gary Kalan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gary Kalan reassigns Medicare benefits to 2 organizations: Amsurg Stamford Anesthesia LLC (Stamford, CT) and Bridgeport Anesthesia Associates, P.C. (Bridgeport, CT). 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 Gary Kalan'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 Gary Kalan 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.