1. Home
  2. Directory
  3. Connecticut
  4. Greenwich
  5. Hospitalist
  6. NPI Profile

ALEXANDER HALLAC MD
NPI 1386039998
Hospitalist in Greenwich, CT

Active since March 31, 2015PECOS EnrolledAccepts Medicare Assignment
5 PERRYRIDGE RD, GREENWICH, CT 06830(203) 863-3151 Get Directions Write a Review

NPPES record last updated: July 24, 2024. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 24, 2024, Oct 12, 2022, Sep 23, 2019 (3 updates tracked since 2019).

About Alexander Hallac Md NPPES

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

ALEXANDER HALLAC MD (NPI 1386039998) is an individual hospitalist provider in Greenwich, Connecticut, licensed in Connecticut (64929) and active in the NPI registry since March 2015. He is enrolled in Medicare PECOS, is affiliated with White Plains Hospital Center, and is a graduate of Other (2015).

NPPES Registry Identity

NPI1386039998
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameALEXANDER HALLACCredential: MD
Location Address5 PERRYRIDGE RDGreenwich, CT 06830-4697
Mailing Address5 Perryridge RdGreenwich, CT 06830-4697 · (781) 744-3839 · Fax (781) 744-1597
Phone(203) 863-3151
Sole ProprietorYes
Medical School CMSOtherGraduated 2015
Enumeration DateMarch 31, 2015
Last NPPES UpdateJuly 24, 20243 updates tracked since enumeration
NPPES CertifiedJuly 24, 2024
✔ NPI 1386039998 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
Licenses✔ Licensed in CT · 64929✔ Licensed in MA · 278916
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
5 PERRYRIDGE RD, Greenwich, CT 06830
Open in Google Maps ↗

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Alexander Hallac Md 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 ID9830490010
PECOS Enrollment IDI20230227001641, I20240812001311
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.

Areas of Expertise CMS Part B claims 4

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.

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.
314 services309 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.
52 services52 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.
26 services25 patients
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221
Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.
11 services11 patients

Hospital Affiliations CMS Care Compare

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

White Plains Hospital Center

Acute Care Hospitals · White Plains, NY
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330304
Location41 East Post R0adWhite Plains, NY 10601 · Westchester County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06830 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.

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
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
ANNE YAN TING CHUA MBBS
Student in an Organized Health Care Education/Training Program
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3409

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 Alexander Hallac's NPI number?

The NPI number for Alexander Hallac is 1386039998. It was assigned to this individual provider in the NPPES registry on March 31, 2015.

Where is Alexander Hallac located?

Alexander Hallac practices at 5 Perryridge Rd, Greenwich, CT 06830. The listed phone number is (203) 863-3151.

What is Alexander Hallac's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Alexander Hallac enrolled in Medicare?

Yes. Alexander Hallac 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.

Is Alexander Hallac affiliated with any hospitals?

According to CMS data, Alexander Hallac is affiliated with White Plains Hospital Center.

When was this NPI record last updated?

The NPPES record for Alexander Hallac was last updated on July 24, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.