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HOLLY CAROLINE JOHNSTON CNP
NPI 1609407600
Nurse Practitioner in Canton, GA

Active since January 29, 2020PECOS EnrolledAccepts Medicare Assignment
68.38/100
CMS Quality Rating
470 NORTHSIDE CHEROKEE BLVD STE 475, CANTON, GA 30115(770) 721-9400(770) 721-9401 Get Directions Write a Review

NPPES record last updated: September 17, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Feb 25, 2021, Jan 29, 2020 (2 updates tracked since 2020).

About Holly Caroline Johnston Cnp NPPES

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

HOLLY CAROLINE JOHNSTON CNP (NPI 1609407600) is an individual nurse practitioner in Canton, Georgia, licensed in Georgia (RN210001) and active in the NPI registry since January 2020. She is enrolled in Medicare PECOS, is affiliated with Northside Hospital Cherokee, and is a graduate of Other (2019).

NPPES Registry Identity

NPI1609407600
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameHOLLY CAROLINE JOHNSTONCredential: CNP
Location Address470 NORTHSIDE CHEROKEE BLVD STE 475Canton, GA 30115-8029
Mailing Address470 Northside Cherokee Blvd Ste 475Canton, GA 30115-8029 · (770) 721-9400 · Fax (770) 721-9401
Phone(770) 721-9400
Fax(770) 721-9401
Sole ProprietorNo
Medical School CMSOtherGraduated 2019
Enumeration DateJanuary 29, 2020
Last NPPES UpdateSeptember 17, 20232 updates tracked since enumeration
NPPES CertifiedSeptember 17, 2023
✔ NPI 1609407600 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in GA · RN210001
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License RN210001 (GA)
470 NORTHSIDE CHEROKEE BLVD STE 475, Canton, GA 30115
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Other Names 1

Former Name (1)Holly Caroline Walsh Cnp

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Absolute Total Care, Ambetter Health, Ambetter of Alabama and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Holly Caroline Johnston Cnp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8527472976
PECOS Enrollment IDI20210127000757
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 Reassignments

2

Medicare enrollment records show Holly Johnston reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Northside Surgical Professional Services LLC
23 mi
Surgery
1000 JOHNSON FERRY RD NE
Atlanta, GA 30342
  • Reassigned Medicare billing, Georgia enrollment
  • 487 clinicians in this Medicare group
NPI 1356630990 (855) 709-4535
Nsh Cancer Institute Professional Services G, LLC
23 mi
Hematology & Oncology
1100 JOHNSON FERRY RD NE, SUITE 600
Sandy Springs, GA 30342
  • Reassigned Medicare billing, Georgia enrollment
  • 163 clinicians in this Medicare group
NPI 1144571381 (404) 256-4777

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 2

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
135 services88 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
35 services28 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northside Hospital Cherokee

Acute Care Hospitals · Canton, GA
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number110008
Location450 Northside Cherokee BoulevardCanton, GA 30115 · Cherokee County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 30115 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$88.06 typical visit price
range $56.84 – $172.43
Typical copayment $22.01 (range $14.21 – $43.10)
Most-billed visit code 99203
Established Patient
$100.20 typical visit price
range $18.22 – $140.40
Typical copayment $25.05 (range $4.55 – $35.10)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

68.38/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality70.82
Improvement Activities40
Cost40.24

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 Holly Johnston's NPI number?

The NPI number for Holly Johnston is 1609407600. It was assigned to this individual provider in the NPPES registry on January 29, 2020. The provider is also known as Holly Caroline Walsh Cnp.

Where is Holly Johnston located?

Holly Johnston practices at 470 Northside Cherokee Blvd Ste 475, Canton, GA 30115. The listed phone number is (770) 721-9400.

What is Holly Johnston's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Holly Johnston enrolled in Medicare?

Yes. Holly Johnston is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Holly Johnston's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Holly Johnston reassigns Medicare benefits to 2 organizations: Northside Surgical Professional Services LLC (Atlanta, GA) and Nsh Cancer Institute Professional Services G, LLC (Sandy Springs, GA). Each 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 Holly Johnston's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Holly Johnston accept?

Health plans from Ambetter Health, Ambetter from Absolute Total Care, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee list Holly Johnston as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Holly Johnston affiliated with any hospitals?

According to CMS data, Holly Johnston is affiliated with Northside Hospital Cherokee.

When was this NPI record last updated?

The NPPES record for Holly Johnston was last updated on September 17, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.