Quick answers
- Does Mary Z. Baker accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Z. Baker 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 Mary Z. Baker see?
- In 2024, CMS data shows 874 Original Medicare patients and 1,392 services for Mary Z. Baker. This counts Original Medicare only and measures volume, not quality.
- What is Mary Z. Baker's NPI number?
- 1942278163. 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 Mary Z. Baker, 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 | 874 |
|---|---|
| Services billed to Medicare | 1,392 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Dxa bone density measurement of hip, pelvis, spine (77080)631 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)161 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)160 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)112 services
- Hemoglobin a1c level (83036)78 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 cholesterol68%
- Arthritis51%
- Diabetes36%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)35%
- Osteoporosis33%
Hospitals where Mary Z. Baker works
Medicare's Facility Affiliation Data lists Mary Z. Baker 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.
- Norman RegionalNorman, OK · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 370008
- O U Medical CenterOklahoma City, OK · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 370093
- SSM Health St Anthony Hospital - Oklahoma CityOklahoma City, OK · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 370037
Practice locations
Addresses where Mary Z. Baker is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 N Lincoln BlvdOklahoma City, OK 73104 (405) 271‑7000
- 1000 N Lincoln Blvd, OU Health PhysiciansOklahoma City, OK 73104 (405) 271‑1000
- 1000 NE 13th StOklahoma City, OK 73104 (405) 271‑3445
- 825 NE 10th StOklahoma City, OK 73104 (405) 271‑4700
- 900 NE 10th St, Ouhp Family MedicineOklahoma City, OK 73104 (572) 244‑0065
Group practices
Medicare enrollment lists Mary Z. Baker as a member of this group (CMS data updated October 2, 2026).
- OU Health Partners Inc1,184 clinicians in the group
Specialties
- Endocrinologyprimary
Other endocrinologists in Oklahoma City
Clinicians with the same Medicare primary specialty in Oklahoma City, OK — not a recommendation.
Other clinicians in OU Health Partners Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Oklahoma College Of Medicine |
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1942278163 |
| 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