Quick answers
- Does Theresa Carla N. Johnson accept Medicare assignment?
- Yes. Medicare's clinician data says Theresa Carla N. Johnson 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 Theresa Carla N. Johnson see?
- In 2024, CMS data shows 59 Original Medicare patients and 605 services for Theresa Carla N. Johnson. This counts Original Medicare only and measures volume, not quality.
- What is Theresa Carla N. Johnson's NPI number?
- 1255600581. 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 Theresa Carla N. Johnson, 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 | 59 |
|---|---|
| Services billed to Medicare | 605 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)325 services
- Psychotherapy with evaluation and management visit, 30 minutes (90833)220 services
- Psychotherapy with evaluation and management visit, 45 minutes (90836)50 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%
- Depression75%
- Anxiety75%
- High blood pressure63%
- Arthritis54%
- Osteoporosis29%
Practice locations
Addresses where Theresa Carla N. Johnson is enrolled with Medicare (CMS data updated October 2, 2026).
- 480 Tesconi Cir, Suite BSanta Rosa, CA 95401
Group practices
Medicare enrollment lists Theresa Carla N. Johnson as a member of this group (CMS data updated October 2, 2026).
- Siyan Clinical Corporation20 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Santa Rosa
Clinicians with the same Medicare primary specialty in Santa Rosa, CA — not a recommendation.
Other clinicians in Siyan Clinical Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255600581 |
| 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
- 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