Quick answers
- Does Janice G. Johnston accept Medicare assignment?
- Medicare's clinician data says Janice G. Johnston may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Janice G. Johnston see?
- In 2024, CMS data shows 98 Original Medicare patients and 881 services for Janice G. Johnston. This counts Original Medicare only and measures volume, not quality.
- What is Janice G. Johnston's NPI number?
- 1144271461. 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 Janice G. Johnston, 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 | 98 |
|---|---|
| Services billed to Medicare | 881 |
| Different services or procedures | 42 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)192 services
- Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (99439)58 services
- Injection of drug or substance under skin or into muscle (96372)44 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)33 services
- Administration of influenza virus vaccine (G0008)19 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%
- Arthritis52%
- Chronic kidney disease31%
- Diabetes28%
- Anxiety28%
Practice locations
Addresses where Janice G. Johnston is enrolled with Medicare (CMS data updated October 2, 2026).
- 16222 N 59th Ave, Suite A100Glendale, AZ 85306
Specialties
- Family Practiceprimary
Other family doctors in Glendale
Clinicians with the same Medicare primary specialty in Glendale, AZ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1993 (33 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1144271461 |
| 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