Quick answers
- Does Nanci Mercer accept Medicare assignment?
- Yes. Medicare's clinician data says Nanci Mercer 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 Nanci Mercer see?
- In 2024, CMS data shows 5,078 Original Medicare patients and 23,363 services for Nanci Mercer. This counts Original Medicare only and measures volume, not quality.
- What is Nanci Mercer's NPI number?
- 1306838776. 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 Nanci Mercer, 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 | 5,078 |
|---|---|
| Services billed to Medicare | 23,363 |
| Different services or procedures | 141 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Injection, gadoterate meglumine, 0.1 ml (A9575)13,050 services
- Screening mammography (77067)2,637 services
- Screening 3d breast mammography (77063)2,612 services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)1,235 services
- X-ray of chest, 1 view (71045)405 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%
- Arthritis51%
- Diabetes40%
- Ischemic heart disease32%
- Anxiety25%
Hospitals where Nanci Mercer works
Medicare's Facility Affiliation Data lists Nanci Mercer 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.
- Adventist Health CastleKailua, HI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 120006
- Bakersfield Memorial HospitalBakersfield, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050036
- Capital Medical CenterOlympia, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500139
- Mercy HospitalBakersfield, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050295
- Northwest Medical CenterTucson, AZ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 030085
Practice locations
Addresses where Nanci Mercer is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 100 Medical DrHannibal, MO 63401 (217) 223‑8400
- 1504 6th StLos Osos, CA 93402 (832) 915‑2534
- 2301 Bahamas DrBakersfield, CA 93309 (661) 326‑9600
- 311 S L StTacoma, WA 98405
- 4500 Morning Dr, Suite 202Bakersfield, CA 93306 (661) 326‑6900
Group practices
Medicare enrollment lists Nanci Mercer as a member of these groups (CMS data updated October 2, 2026).
- Multicare Health System2,325 clinicians in the group
- Sonoran Radiology Ltd475 clinicians in the group
- Blessing Hospital421 clinicians in the group
- Kern Radiology Medical Group Inc100 clinicians in the group
- Pacific Radiology Group Inc31 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Hannibal
Clinicians with the same Medicare primary specialty in Hannibal, MO — not a recommendation.
Other clinicians in Multicare Health System
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Drexel University College Of Medicine |
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306838776 |
| 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