MARK E. GREGORY M.D.
NPI 1659346963
Emergency Medicine in Guthrie, OK

Q: What is Mark Gregory's NPI number?

The NPI number for Mark Gregory is 1659346963. It was assigned to this individual provider in the NPPES registry on February 21, 2006.

Q: What is Mark Gregory's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Mark Gregory was last updated on May 20, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.

Active since February 21, 2006PECOS Enrolled

200 S ACADEMY RD, GUTHRIE, OK 73044(405) 282-5125 Get Directions Write a Review

NPPES record last updated: May 20, 2014. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Mark E. Gregory M.d. NPPES

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

MARK E. GREGORY M.D. (NPI 1659346963) is an individual emergency medicine provider in Guthrie, Oklahoma, licensed in Oklahoma (16492) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1659346963

Entity TypeIndividualMale

Primary Taxonomy207P00000X

Provider Legal NameMARK E. GREGORYCredential: M.D.

Location Address200 S ACADEMY RDGuthrie, OK 73044-8727

Mailing Address4401 W Memorial Rd, Suite 140Oklahoma City, OK 73134-1785 · (405) 752-3162 · Fax (405) 936-5211

Phone(405) 282-5125

Sole ProprietorNo

Enumeration DateFebruary 21, 2006

Last NPPES UpdateMay 20, 2014

✔ NPI 1659346963 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in OK · 16492

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

200 S ACADEMY RD, Guthrie, OK 73044

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Other Identifiers 4

Medicare UPINE58188

Other020654565002OK · Bcbs

Medicare ID-Type Unspecified248423815OK

Medicaid100231340AOK

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark E. Gregory 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

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

South Central Emergency Services PC

27 mi

Emergency Medicine

1323 W 6TH AVE
Stillwater, OK 74074

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

NPI 1558663724 (925) 924-1600

Emergency Services Of Oklahoma PC

45 mi

Emergency Medicine

901 N PORTER AVE
Norman, OK 73071

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

NPI 1215249891 (925) 924-1600

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 5

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.

Emergency department visit with high level of medical decision making 99285

An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.

277 services259 patients

Emergency department visit with moderate level of medical decision making 99284

An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.

183 services175 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

84 services74 patients

Emergency department visit with low level of medical decision making 99283

An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.

60 services56 patients

Emergency department visit with straightforward medical decision making 99282

An emergency department visit for a mild to moderate issue is when you seek immediate medical attention for a non-life-threatening condition. This could include minor injuries, moderate pain, or illnesses like the flu. During the visit, healthcare professionals assess your condition, provide treatment, and may recommend follow-up care.

17 services17 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 73044 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

$82.46 typical visit price

range $53.00 – $162.61

Typical copayment $20.61 (range $13.25 – $40.65)

Most-billed visit code 99203

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 19

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LOGAN HOSPITAL AND MEDICAL CENTER AUTHORITY

General Acute Care Hospital (Critical Access)