Quick answers
- Does Christine R. Martinez accept Medicare assignment?
- Yes. Medicare's clinician data says Christine R. Martinez 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 Christine R. Martinez see?
- In 2024, CMS data shows 638 Original Medicare patients and 13,403 services for Christine R. Martinez. This counts Original Medicare only and measures volume, not quality.
- What is Christine R. Martinez's NPI number?
- 1871650523. 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 Christine R. Martinez, 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 | 638 |
|---|---|
| Services billed to Medicare | 13,403 |
| Different services or procedures | 50 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Hyaluronan or derivative, gelsyn-3, for intra-articular injection, 0.1 mg (J7328)6,552 services
- Hyaluronan or derivative, durolane, for intra-articular injection, 1 mg (J7318)4,320 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)737 services
- X-ray of pelvis, 1-2 views (72170)307 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)285 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 cholesterol75%
- Arthritis75%
- High blood pressure70%
- Ischemic heart disease22%
- Anxiety21%
- Osteoporosis21%
Hospitals where Christine R. Martinez works
Medicare's Facility Affiliation Data lists Christine R. Martinez 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.
- John Muir Medical Center - Concord CampusConcord, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050496
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050180
Practice locations
Addresses where Christine R. Martinez is enrolled with Medicare (CMS data updated October 2, 2026).
- 2405 Shadelands DrWalnut Creek, CA 94598 (925) 939‑8585
- 350 John Muir Pkwy, Suite 155Brentwood, CA 94513 (925) 939‑8585
Group practices
Medicare enrollment lists Christine R. Martinez as a member of this group (CMS data updated October 2, 2026).
- Golden State Orthopedics and Spine182 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Walnut Creek
Clinicians with the same Medicare primary specialty in Walnut Creek, CA — not a recommendation.
Other clinicians in Golden State Orthopedics and Spine
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2004 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871650523 |
| 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