Quick answers
- Does Tollin K. Sullivan accept Medicare assignment?
- Yes. Medicare's clinician data says Tollin K. Sullivan 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 Tollin K. Sullivan see?
- In 2024, CMS data shows 1,789 Original Medicare patients and 8,308 services for Tollin K. Sullivan. This counts Original Medicare only and measures volume, not quality.
- What is Tollin K. Sullivan's NPI number?
- 1922387091. 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 Tollin K. Sullivan, 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 | 1,789 |
|---|---|
| Services billed to Medicare | 8,308 |
| Different services or procedures | 41 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,425 services
- Advance care planning, first 30 minutes (99497)1,364 services
- Annual depression screening, 5 to 15 minutes (G0444)1,343 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)1,333 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)275 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%
- High blood pressure66%
- Diabetes61%
- Chronic kidney disease43%
- Arthritis36%
- Ischemic heart disease21%
Hospitals where Tollin K. Sullivan works
Medicare's Facility Affiliation Data lists Tollin K. Sullivan 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.
- Mayers Memorial HospitalFall River Mills, CA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 051305
- Mercy Medical Center ReddingRedding, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050280
- Oroville HospitalOroville, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050030
- Shasta Regional Medical CenterRedding, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050764
- St Elizabeth Community HospitalRed Bluff, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 050042
Practice locations
Addresses where Tollin K. Sullivan is enrolled with Medicare (CMS data updated October 2, 2026).
- 2510 Airpark Dr, Suite 201Redding, CA 96001 (530) 244‑4034
Group practices
Medicare enrollment lists Tollin K. Sullivan as a member of this group (CMS data updated October 2, 2026).
- Redding Family Medical Group Inc5 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Redding
Clinicians with the same Medicare primary specialty in Redding, CA — not a recommendation.
Other clinicians in Redding Family Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2011 (15 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1922387091 |
| 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