Dr. Mark S. Simmons, MD
Internal Medicine (Internal Medicine Physician)
3870 W. River Rd, #126
Tuscon, AZ 85741
Who else practices at this address →
Pima County includes primary care (34% of residents) and dental (4% of residents) and mental health (14% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Years since graduation
- 34
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 310
Licensed in Colorado since 1999, according to the Colorado Department of Regulatory Agencies. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Internal Medicine Physician primary
CO license 37923 (first issued 1999; expired) -
Pediatrics Physician
CO license 37923 (first issued 1999; expired)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Northwest Medical Center Tucson, AZ
Medical groups
- Northwest Urgent Care LLC (69 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 310
- Services billed
- 646
- Patients’ average age
- 75
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes | 223 | 190 |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 173 | 173 |
| Established patient office or other outpatient visit, 20-29 minutes | 169 | 122 |
| Administration of influenza virus vaccine | 62 | 62 |
| Influenza vaccine split virus, preservative free | 60 | 60 |
| Transitional care management services for problem of high complexity | 27 | 20 |
| Administration of pneumococcal vaccine | 23 | 23 |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | 23 | 23 |
| Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment | 19 | 19 |
| Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and | 18 | 14 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.