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DR. KAREN REYNOLDS JOHNSTON MD
NPI 1326518325
General Practice in Palo Alto, CA

Active since December 03, 2018PECOS Enrolled
95.18/100
CMS Quality Rating
478 E CHARLESTON RD, PALO ALTO, CA 94306(650) 380-9149 Get Directions Write a Review

NPPES record last updated: January 28, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 28, 2022, Dec 3, 2018 (2 updates tracked since 2018).

About Dr. Karen Reynolds Johnston Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. KAREN REYNOLDS JOHNSTON MD (NPI 1326518325) is an individual general practice provider in Palo Alto, California, licensed in California (G67445) and active in the NPI registry since December 2018. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1326518325
Entity TypeIndividualFemale
Primary Taxonomy208D00000X
Provider Legal NameDR. KAREN REYNOLDS JOHNSTONCredential: MD
Location Address478 E CHARLESTON RDPalo Alto, CA 94306-4235
Mailing Address478 E Charleston RdPalo Alto, CA 94306-4235 · (650) 813-1471
Phone(650) 380-9149
Sole ProprietorNo
Enumeration DateDecember 3, 2018
Last NPPES UpdateJanuary 28, 20222 updates tracked since enumeration
NPPES CertifiedJanuary 28, 2022
✔ NPI 1326518325 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians
Taxonomy Code208D00000X
License✔ Licensed in CA · G67445
Definition
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee
Also ListedPathology · Anatomic Pathology & Clinical PathologyTaxonomy 207ZP0102X · License G67445 (CA)
478 E CHARLESTON RD, Palo Alto, CA 94306
Open in Google Maps ↗

Other Names 1

Former Name (1)Miss Karen Mutch Reynolds Md

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Karen Reynolds Johnston Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Karen Johnston reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Wound MD PC
70 mi
General Practice
2 BORAZON CT
Petaluma, CA 94952
  • Reassigned Medicare billing, California enrollment
  • 37 clinicians in this Medicare group
NPI 1942606744 (323) 800-2799

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 7

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308
A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.
924 services164 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes 99307
A follow-up nursing facility visit per day typically lasts about 10 minutes. This service involves a healthcare professional checking on your health status, answering any questions you may have, and monitoring your progress. This routine check ensures your recovery is on track and any concerns are addressed promptly.
353 services206 patients
Initial nursing facility care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99304
An initial nursing facility visit is a daily check-up to monitor your health status. This service, lasting typically 25 minutes, involves a nurse assessing your overall wellbeing, discussing concerns, and updating your care plan as needed.
158 services158 patients
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
85 services32 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308
A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.
72 services23 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes 99307
A follow-up nursing facility visit per day typically lasts about 10 minutes. This service involves a healthcare professional checking on your health status, answering any questions you may have, and monitoring your progress. This routine check ensures your recovery is on track and any concerns are addressed promptly.
20 services19 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

95.18/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality70.36
Improvement Activities40

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Karen Johnston's NPI number?

The NPI number for Karen Johnston is 1326518325. It was assigned to this individual provider in the NPPES registry on December 3, 2018. The provider is also known as Miss Karen Mutch Reynolds MD.

Where is Karen Johnston located?

Karen Johnston practices at 478 E Charleston Rd, Palo Alto, CA 94306. The listed phone number is (650) 380-9149.

What is Karen Johnston's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Is Karen Johnston enrolled in Medicare?

Yes. Karen Johnston is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Karen Johnston's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karen Johnston reassigns Medicare benefits to Wound MD PC (Petaluma, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Karen Johnston's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Karen Johnston was last updated on January 28, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.