DR. GREGORY DON BALCERAK DO
NPI 1538839154
Internal Medicine in Stillwater, OK

Q: What is Gregory Balcerak's NPI number?

The NPI number for Gregory Balcerak is 1538839154. It was assigned to this individual provider in the NPPES registry on September 15, 2021.

Q: What is Gregory Balcerak's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Gregory Balcerak was last updated on July 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.

Active since September 15, 2021PECOS Enrolled

1815 W 6TH AVE, STILLWATER, OK 74074(405) 743-7300 Get Directions Write a Review

NPPES record last updated: July 27, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 27, 2026, May 8, 2023, Sep 15, 2021 (3 updates tracked since 2021).

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About Dr. Gregory Don Balcerak Do NPPES

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

DR. GREGORY DON BALCERAK DO (NPI 1538839154) is an individual internal medicine provider in Stillwater, Oklahoma, licensed in Oklahoma (8596) and active in the NPI registry since September 2021. He is enrolled in Medicare PECOS, is affiliated with O U Medical Center, and is a graduate of Oklahoma State University College Of Osteopathic Medicine (2023).

NPPES Registry Identity

NPI1538839154

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. GREGORY DON BALCERAKCredential: DO

Location Address1815 W 6TH AVEStillwater, OK 74074-4202

Mailing Address501 Copperfield DrEdmond, OK 73003-6177

Phone(405) 743-7300

Sole ProprietorNo

Medical School CMSOklahoma State University College Of Osteopathic MedicineGraduated 2023

Enumeration DateSeptember 15, 2021

Last NPPES UpdateJuly 27, 20263 updates tracked since enumeration

NPPES CertifiedJuly 27, 2026

✔ NPI 1538839154 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in OK · 8596

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

1815 W 6TH AVE, Stillwater, OK 74074

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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)

Dr. Gregory Don Balcerak Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1850752189

PECOS Enrollment IDI20260809000068

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 Gregory Balcerak reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Stillwater Medical Center Authority

2.2 mi

General Acute Care Hospital

1323 W 6TH AVE
Stillwater, OK 74074

Reassigned Medicare billing, Oklahoma enrollment
147 clinicians in this Medicare group

NPI 1164494027 (405) 372-1480

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

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

O U Medical Center

Acute Care Hospitals · Oklahoma City, OK

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number370093

Location700 NE 13th StreetOklahoma City, OK 73104 · Oklahoma County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 74074 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

$123.06 typical visit price

range $53.00 – $162.61

Typical copayment $30.76 (range $13.25 – $40.65)

Most-billed visit code 99204

Established Patient

$94.27 typical visit price

range $16.68 – $132.40

Typical copayment $23.56 (range $4.17 – $33.10)

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.

CONNIE R LOWRY ARNP

Nurse Practitioner