Karen Reynolds Johnston, MD
Karen Reynolds Johnston, MD practices as part of a group general practitioner practice in Palo Alto, CA. With 38+ years of experience, she has been practicing in the Palo Alto area. Among her Medicare patients, common conditions include hypertension, high cholesterol, and diabetes (per CMS data). CMS MIPS quality score: 95.18/100 (2023).
At a glance
- Federal MIPS score higher than 80% of MIPS-scored doctors in California
- Virtual visits available — no app or travel required
Older · 1559dNPPES updated 2022-01-28 · verify on CMS
How Does This Doctor Compare?
Based on Medicare data, this doctor scores better than 80% of doctors in California on federal quality measures.
MIPS Score
202395.18/100
California avg: 78.6 · US avg: 83.6
✓ Higher than most doctors nationally(+11.6 pts)
Better than 80% of MIPS-scored doctors in CaliforniaHow the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Generic Rx
↑ Higher = better33.3%
California avg: 83.3 · US avg: 82.8
⚠ Lower than most doctors nationally(-49.5 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
259
Unique beneficiaries
Standard volumePrescriptions Written
18
Total claims
Total Medicare drug cost: $6k
Percentile rankings compared against 9,360 reporting peers in California.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Diabetes.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+4%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↑ More patients than average (+25%) — a focus area for this doctor
Conditions affecting emotional state, including depression and bipolar disorder
Progressive brain disorders causing memory loss and cognitive decline
A mood disorder causing persistent sadness and loss of interest in activities
US avg: 31.8%↑ More patients than average (+15%) — a focus area for this doctor
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↑ More patients than average (+14%) — a focus area for this doctor
The heart cannot pump blood efficiently enough to meet the body's needs
US avg: 22.5%↑ More patients than average (+18%) — a focus area for this doctor
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Board certified · Jan 27, 2022
CMS-verified certification date
38 years in practice
Senior practitioner
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
Taxonomy: 208D00000X
Virtual General Practice Care With Karen Reynolds Johnston
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Karen Reynolds Johnston for blood pressure monitoring, cholesterol management, diabetes check-ins — no travel to Palo Alto required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Karen Reynolds Johnston
Dr. Johnston is listed as active in the NPI registry with telehealth listed in Palo Alto, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (650) 380-9149.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Physician Comparator. See Data Methodology.
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Contact Karen Reynolds Johnston
Practice Location
478 E Charleston Rd, Palo Alto, CA 94306-4235
Mailing Address
478 E Charleston Rd, Palo Alto, CA 94306-4235
This is a provider directory. Contact the office directly to schedule appointments.
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