Quick answers
- Does Gayla A. Barker accept Medicare assignment?
- Yes. Medicare's clinician data says Gayla A. Barker accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Gayla A. Barker see?
- In 2024, CMS data shows 125 Original Medicare patients and 1,875 services for Gayla A. Barker. This counts Original Medicare only and measures volume, not quality.
- What is Gayla A. Barker's NPI number?
- 1699151142. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Gayla A. Barker, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 125 |
|---|---|
| Services billed to Medicare | 1,875 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Removal of skin and tissue, 20.0 sq cm or less (11042)527 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)404 services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)346 services
- Removal of skin and tissue, each additional 20.0 sq cm or less (11045)206 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)158 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis63%
- Ischemic heart disease61%
- Diabetes52%
- Chronic kidney disease42%
Hospitals where Gayla A. Barker works
Medicare's Facility Affiliation Data lists Gayla A. Barker at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Mercy Hospital Ardmore, IncArdmore, OK · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 370047
- Mercy Hospital MariettaMarietta, OK · Critical Access Hospital · Emergency services: listed by Medicare · CCN 371306
Practice locations
Addresses where Gayla A. Barker is enrolled with Medicare (CMS data updated October 2, 2026).
- 430 N Monte Vista StAda, OK 74820 (580) 332‑2323
Group practices
Medicare enrollment lists Gayla A. Barker as a member of this group (CMS data updated October 2, 2026).
- Mercy Clinic Oklahoma Communities649 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Ada
Clinicians with the same Medicare primary specialty in Ada, OK — not a recommendation.
Other clinicians in Mercy Clinic Oklahoma Communities
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699151142 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians