Doctor profile · Federal record
Dr. Karen Johnston, MD
General Practice Physician · Anatomic Pathology & Clinical Pathology Physician · Palo Alto, CA
- NPI 1326518325
- MIPS 85.2 / 100 · 2023
- 8 yrs on file
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
478 E Charleston RD
Palo Alto, CA 943064235
(650) 380-9149
Credentials & registration
- NPI registered
- December 2018 — 8 yrs on file
- Profile last updated
- January 28, 2022
- Specialty taxonomy
- 208D00000X — NUCC code
- State license (1)
- California #G67445
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1326518325. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,168
Distinct HCPCS
7
Medicare allowed
$99,733
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99308 |
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes | 640 | 125 | $85 | |
99308 |
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes | 168 | 41 | $86 | |
99304 |
Initial nursing facility care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 113 | 113 | $91 | |
99309 |
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 103 | 33 | $122 | |
99307 |
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes | 95 | 71 | $46 | |
99304 |
Initial nursing facility care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 30 | 30 | $92 | |
99307 |
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes | 19 | 17 | $46 |
In context: peer comparison
Among 3 peers in Palo Alto General Practice Physician, average services per provider: 258. This provider delivers 4.5× the peer median.Frequently asked questions
What is Dr. Karen Johnston's medical specialty?
Dr. Karen Johnston practices General Practice Physician in Palo Alto, CA.
Where does Dr. Karen Johnston practice?
Dr. Karen Johnston practices at 478 E Charleston RD, Palo Alto, CA 943064235. Office phone: 6503809149.
What is Dr. Karen Johnston's NPI?
Dr. Karen Johnston's National Provider Identifier (NPI) is 1326518325, issued by NPPES.
What procedures does Dr. Karen Johnston commonly perform?
Top Medicare-reported procedures in 2023: Subsequent nursing facility care with straightforward level of medical decision making (HCPCS 99308); Subsequent nursing facility care with straightforward level of medical decision making (HCPCS 99308); Initial nursing facility care with straightforward or low level of medical decision making (HCPCS 99304). Source: CMS Medicare Physician & Other Practitioners file.