1. Home
  2. Directory
  3. New York
  4. Stony Brook
  5. Urology
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MICHAEL LOUIS ERNST MD
NPI 1386039378
Urology - Pediatric Urology in Stony Brook, NY

Active since April 06, 2015PECOS Enrolled
98.52/100
CMS Quality Rating
101 NICHOLLS RD, HSC-9 040, STONY BROOK, NY 11795(631) 444-1176 Get Directions Write a Review

NPPES record last updated: August 7, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Aug 7, 2026, Oct 7, 2022, Sep 27, 2022 and 4 more (7 updates tracked since 2021).

About Michael Louis Ernst Md NPPES

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

MICHAEL LOUIS ERNST MD (NPI 1386039378) is an individual pediatric urology provider in Stony Brook, New York, licensed in New York (316666) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, is affiliated with Suny/stony Brook University Hospital, and maintains 5 additional practice locations.

NPPES Registry Identity

NPI1386039378
Entity TypeIndividualMale
Primary Taxonomy2088P0231X
Provider Legal NameMICHAEL LOUIS ERNSTCredential: MD
Location Address101 NICHOLLS RD, HSC-9 040Stony Brook, NY 11795
Mailing Address101 Nicholls Rd, Hsc-9 040Stony Brook, NY 11795 · (631) 444-1176
Phone(631) 444-1176
Sole ProprietorNo
Medical School CMSOtherGraduated 2015
Enumeration DateApril 6, 2015
Last NPPES UpdateAugust 7, 20267 updates tracked since enumeration
NPPES CertifiedAugust 7, 2026
✔ NPI 1386039378 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyUrology · Pediatric UrologyAllopathic & Osteopathic Physicians
Taxonomy Code2088P0231X
Licenses✔ Licensed in NY · 316666✔ Licensed in OH · 35.138575
Definition
Surgeons who can diagnose, treat, and manage children's urinary and genital problems. A pediatric urologist devotes a minimum of 50% of his or her practice to the urologic problems of infants, children, and adolescents. Pediatric urologists generally provide the following services: the evaluation and management of voiding disorders; vesicoureteral reflux, and urinary tract infections that require surgery; surgical reconstruction of the urinary tract (kidneys, ureters, and bladder) including genital abnormalities, hypospadias, and intersex conditions; surgery for groin conditions in childhood and adolescence (undescended testes, hydrocele/hernia, varicocele).
Also ListedUrologyTaxonomy 208800000X · License 30.138575 (OH), 316666 (NY)
101 NICHOLLS RD, Stony Brook, NY 11795
Open in Google Maps ↗

Secondary Practice Locations 5

Location 11001 Main StBuffalo, NY 14203-1009 · Phone (716) 852-4772
Location 274 Commerce AveRiverhead, NY 11901-3105 · Phone (631) 444-6270
Location 3280 Union AveHolbrook, NY 11741-1832 · Phone (631) 444-6270
Location 4818 Ellicott StBuffalo, NY 14203-1021 · Phone (716) 852-4772
Location 524 Research WaySetauket, NY 11733-3487 · Phone (631) 444-6270

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

Michael Louis Ernst 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 ID5698010015
PECOS Enrollment IDI20220913000808
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 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.

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.
25 services19 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.
13 services13 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.
12 services12 patients

Hospital Affiliations CMS Care Compare

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

Suny/Stony Brook University Hospital

Acute Care Hospitals · Stony Brook, NY
4/5 CMS rating
OwnershipGovernment - State
CMS Certification Number330393
LocationHealth Sciences Center SunyStony Brook, NY 11794 · Suffolk County
Emergency services Birthing friendly

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.

98.52/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality82.85
Promoting Interoperability100
Improvement Activities40

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 Michael Ernst's NPI number?

The NPI number for Michael Ernst is 1386039378. It was assigned to this individual provider in the NPPES registry on April 6, 2015.

Where is Michael Ernst located?

Michael Ernst practices at 101 Nicholls Rd Hsc-9 040, Stony Brook, NY 11795. The listed phone number is (631) 444-1176.

What is Michael Ernst's specialty?

The primary specialty registered for this NPI is Urology, specializing in Pediatric Urology, with taxonomy code 2088P0231X.

Is Michael Ernst enrolled in Medicare?

Yes. Michael Ernst 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 Michael Ernst affiliated with any hospitals?

According to CMS data, Michael Ernst is affiliated with Suny/Stony Brook University Hospital.

When was this NPI record last updated?

The NPPES record for Michael Ernst was last updated on August 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 days 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.