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DR. BRIAN ROBERT KOCAK MD
NPI 1558090357
Hospitalist in Saint Louis, MO

Active since June 07, 2022PECOS EnrolledAccepts Medicare Assignment
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST, SAINT LOUIS, MO 63110(314) 362-1700(314) 362-9878 Get Directions Write a Review

NPPES record last updated: July 15, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Brian Robert Kocak Md NPPES

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

DR. BRIAN ROBERT KOCAK MD (NPI 1558090357) is an individual hospitalist provider in Saint Louis, Missouri, licensed in Missouri (2024040376) and active in the NPI registry since June 2022. He is enrolled in Medicare PECOS, is affiliated with Barnes Jewish Hospital, and is a graduate of University Of Pittsburgh School Of Medicine (2022).

NPPES Registry Identity

NPI1558090357
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameDR. BRIAN ROBERT KOCAKCredential: MD
Location Address1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALISTSaint Louis, MO 63110-1003
Mailing AddressPo Box 7412011Chicago, IL 60674-2011 · (314) 362-1700 · Fax (314) 362-9878
Phone(314) 362-1700
Fax(314) 362-9878
Sole ProprietorNo
Medical School CMSUniversity Of Pittsburgh School Of MedicineGraduated 2022
Enumeration DateJune 7, 2022
Last NPPES UpdateJuly 15, 2025
NPPES CertifiedJune 7, 2022
✔ NPI 1558090357 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in MO · 2024040376
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.
Also ListedInternal MedicineTaxonomy 207R00000X · License 2024040376 (MO)
1 BARNES JEWISH HOSPITAL PLZ, Saint Louis, MO 63110
Open in Google Maps ↗

Other Identifiers 1

Medicaid200111048MO

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Cox HealthPlans.Insurance ›

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

Dr. Brian Robert Kocak 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 ID5597138313
PECOS Enrollment IDI20250806003294
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.

Hospital Affiliations CMS Care Compare

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

Barnes Jewish Hospital

Acute Care Hospitals · Saint Louis, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number260032
LocationOne Barnes-Jewish Hospital PlazaSaint Louis, MO 63110 · St. Louis City County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63110 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
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
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.

DR. MARGARET LEIGHTON MCNAIRY MD
Hospitalist
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1700
ANNA RABINOV ANNA RABINOV
Obstetrics & Gynecology
1 BARNES JEWISH HOSPITAL PLZ
SAINT LOUIS, MO 63110
St. Louis City (314) 747-3000
MRS. MICHELLE MARIE BLOOM ACNP
Nurse Practitioner (Acute Care)
1 BARNES JEWISH HOSPITAL PLZ, DEPT ANESTHESIOLOGY
SAINT LOUIS, MO 63110
St. Louis City (800) 862-9980
DR. FARIS ADAM BAKEER MD
Hospitalist
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1700
DR. REHAN RAIS MD
Hospitalist
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1700
DR. RANDY OLIVIER LAINE MD
Hospitalist
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1700
DR. BRADLEY SETH KUSHNER MD
Surgery
1 BARNES JEWISH HOSPITAL PLZ, DIV SURG VASCULAR
SAINT LOUIS, MO 63110
St. Louis City (314) 273-7373
MS. KELSEY ELISE FOGUS CRNA
Nurse Anesthetist, Certified Registered
1 BARNES JEWISH HOSPITAL PLZ, DEPT ANESTHESIOLOGY
SAINT LOUIS, MO 63110
St. Louis City (800) 862-9980

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 Brian Kocak's NPI number?

The NPI number for Brian Kocak is 1558090357. It was assigned to this individual provider in the NPPES registry on June 7, 2022.

Where is Brian Kocak located?

Brian Kocak practices at 1 Barnes Jewish Hospital Plz Div Im Hospitalist, Saint Louis, MO 63110. The listed phone number is (314) 362-1700.

What is Brian Kocak's specialty?

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

Is Brian Kocak enrolled in Medicare?

Yes. Brian Kocak 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.

What insurance does Brian Kocak accept?

Health plans from Cox HealthPlans list Brian Kocak 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 Brian Kocak affiliated with any hospitals?

According to CMS data, Brian Kocak is affiliated with Barnes Jewish Hospital.

When was this NPI record last updated?

The NPPES record for Brian Kocak was last updated on July 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.