1. Home
  2. Directory
  3. Oklahoma
  4. Wewoka
  5. Optometrist
  6. NPI Profile

DR. GREGORY DONALD MCLAIN O.D.
NPI 1871599704
Optometrist in Wewoka, OK

Active since June 24, 2005PECOS Enrolled
WEWOKA IHS HEALTH CENTER, JUNCTION HWY 56&270, WEWOKA, OK 74884(800) 390-5181(405) 257-3344 Get Directions Write a Review

NPPES record last updated: October 27, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Gregory Donald Mclain O.d. NPPES

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

DR. GREGORY DONALD MCLAIN O.D. (NPI 1871599704) is an individual optometrist in Wewoka, Oklahoma, licensed in Wyoming (114) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1871599704
Entity TypeIndividualMale
Primary Taxonomy152W00000X
Provider Legal NameDR. GREGORY DONALD MCLAINCredential: O.D.
Location AddressWEWOKA IHS HEALTH CENTER, JUNCTION HWY 56&270Wewoka, OK 74884-1475
Mailing Address17909 Gaddy RdShawnee, OK 74801-8717 · (405) 273-5153
Phone(800) 390-5181
Fax(405) 257-3344
Sole ProprietorNo
Enumeration DateJune 24, 2005
Last NPPES UpdateOctober 27, 2011
✔ NPI 1871599704 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers
Taxonomy Code152W00000X
License✔ Licensed in WY · 114
Definition
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
WEWOKA IHS HEALTH CENTER, Wewoka, OK 74884
Open in Google Maps ↗

Other Identifiers 1

Medicare UPINU85222OK

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 Donald Mclain O.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 Reassignment

Medicare enrollment records show Gregory Mclain reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Wewoka Indian Health
4.3 mi
Community Health
36640 HWY 270
Wewoka, OK 74884
  • Reassigned Medicare billing, Texas enrollment
  • 129 clinicians in this Medicare group
NPI 1689664195 (405) 257-6282

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 74884 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
$66.48 typical visit price
range $16.68 – $132.40
Typical copayment $16.62 (range $4.17 – $33.10)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Gregory Mclain's NPI number?

The NPI number for Gregory Mclain is 1871599704. It was assigned to this individual provider in the NPPES registry on June 24, 2005.

Where is Gregory Mclain located?

Gregory Mclain practices at Wewoka Ihs Health Center Junction Hwy 56&270, Wewoka, OK 74884. The listed phone number is (800) 390-5181.

What is Gregory Mclain's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Is Gregory Mclain enrolled in Medicare?

Yes. Gregory Mclain is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Gregory Mclain's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Mclain reassigns Medicare benefits to Wewoka Indian Health (Wewoka, OK). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gregory Mclain's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Gregory Mclain was last updated on October 27, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.