DR. MATTHEWS W GWYNN M.D.
NPI 1225112667
Psychiatry & Neurology - Neurology in Atlanta, GA

Q: What is Matthews Gwynn's NPI number?

The NPI number for Matthews Gwynn is 1225112667. It was assigned to this individual provider in the NPPES registry on October 24, 2006.

Q: What is Matthews Gwynn's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Q: When was this NPI record last updated?

The NPPES record for Matthews Gwynn was last updated on September 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.

Active since October 24, 2006PECOS EnrolledAccepts Medicare Assignment

92.26/100

CMS Quality Rating

990 HAMMOND DR STE 325, ATLANTA, GA 30328(404) 256-3720(404) 843-9032 Get Directions Write a Review

NPPES record last updated: September 4, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Sep 4, 2025, Mar 29, 2021, Dec 17, 2020 and 1 more (4 updates tracked since 2020).

On this page

About Dr. Matthews W Gwynn M.d. NPPES

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

DR. MATTHEWS W GWYNN M.D. (NPI 1225112667) is an individual neurology provider in Atlanta, Georgia, licensed in Georgia (034147) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Northside Hospital Cherokee, and is a graduate of University Of Virginia School Of Medicine (1985).

NPPES Registry Identity

NPI1225112667

Entity TypeIndividualMale

Primary Taxonomy2084N0400X

Provider Legal NameDR. MATTHEWS W GWYNNCredential: M.D.

Location Address990 HAMMOND DR STE 325Atlanta, GA 30328-6175

Mailing Address990 Hammond Dr Ste 325Atlanta, GA 30328-6175 · (404) 256-3720 · Fax (404) 843-9032

Phone(404) 256-3720

Fax(404) 843-9032

Sole ProprietorNo

Medical School CMSUniversity Of Virginia School Of MedicineGraduated 1985

Enumeration DateOctober 24, 2006

Last NPPES UpdateSeptember 4, 20254 updates tracked since enumeration

NPPES CertifiedSeptember 4, 2025

✔ NPI 1225112667 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians

Taxonomy Code2084N0400X

Licenses✔ Licensed in GA · 034147✔ Licensed in KY · 44418✔ Licensed in SC · 33050✔ Licensed in FL · ME117503✔ Licensed in NC · 2010-02036✔ Licensed in VA · 0101045114✔ Licensed in IN · 01079030A✔ Licensed in AZ · 46696

Definition

A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.

Also ListedSpecialistTaxonomy 174400000X · License 034147 (GA)

990 HAMMOND DR STE 325, Atlanta, GA 30328

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Matthews W Gwynn M.d. 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 ID244425320

PECOS Enrollment IDI20101116000173

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.

Areas of Expertise CMS Part B claims 15

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.

Injection, onabotulinumtoxina, 1 unit J0585

Onabotulinumtoxina, also known as Botox, is a medication injected into muscles. It's used to treat various conditions by blocking nerve activity in the muscles, causing a temporary reduction in muscle activity. The units refer to the dosage.

21,552 services42 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.

456 services271 patients

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.

143 services58 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

111 services111 patients

Injection of chemical for paralysis of nerve muscles on side of neck excluding voice box 64616

This procedure involves injecting a chemical into specific neck muscles, causing temporary paralysis. It's designed to alleviate symptoms related to nerve disorders. The voice box isn't affected, ensuring normal speech post-procedure.

67 services20 patients

Needle measurement of electrical activity in arm or leg muscles, complete study 95886

This procedure, known as an electromyography (EMG), involves inserting a small needle into your arm or leg muscles to measure their electrical activity. This complete study helps diagnose issues with nerves or muscles, providing valuable data for your treatment plan.

56 services55 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

45 services45 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

45 services40 patients

Injection of chemical for paralysis of nerve muscles on side of face 64612

This procedure involves injecting a chemical into specific facial nerves, causing temporary muscle paralysis. It's used to treat conditions like facial spasms or wrinkles. The effects are usually temporary, requiring repeat treatments.

41 services13 patients

Ultrasound of both sides of head and neck blood flow 93880

An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.

35 services35 patients

Ultrasound of one leg arteries or artery grafts 93926

An ultrasound of leg arteries or artery grafts is a non-invasive test using sound waves to create images of your blood vessels. This helps doctors assess blood flow, identify blockages, and monitor the health of grafts.

34 services34 patients

Complete ultrasound of aorta, vena cava, groin vessels or bypass grafts 93978

This procedure involves using sound waves to create images of your aorta, vena cava, groin vessels, or bypass grafts. It helps to detect abnormalities or blockages, ensuring your blood flows smoothly. It's painless and non-invasive.

34 services33 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

31 services31 patients

Nerve conduction, 9-10 studies 95911

Nerve conduction studies involve sending small electrical shocks through the skin to measure how quickly nerves transmit signals. This helps detect nerve damage. 9-10 studies mean this process will be repeated on different nerves to gather comprehensive data.

31 services30 patients

Administration of psychological or neuropsychological test by technician, first 30 minutes 96138

This procedure involves a trained technician administering a psychological or neuropsychological test. It's a process that assesses your mental function and behavior. The initial session will last 30 minutes. The aim is to understand your cognitive abilities better.

19 services19 patients

Hospital Affiliations CMS Care Compare 2

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

Northside Hospital

Acute Care Hospitals · Atlanta, GA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number110161

Location1000 Johnson Ferry Road, NEAtlanta, GA 30342 · Fulton County

Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 30328 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

$130.64 typical visit price

range $56.84 – $172.43

Typical copayment $32.66 (range $14.21 – $43.10)

Most-billed visit code 99204

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.

92.26/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

73.83

Promoting Interoperability

100

Improvement Activities

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

GERALD SILVERBOARD MD

Psychiatry & Neurology (Neurology)

990 HAMMOND DR STE 325
SANDY SPRINGS, GA 30328

Fulton County (404) 256-3720

ATLANTA NEUROLOGY

Specialist

990 HAMMOND DR STE 325
ATLANTA, GA 30328

Fulton County (404) 256-3720

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 Matthews Gwynn's NPI number?

The NPI number for Matthews Gwynn is 1225112667. It was assigned to this individual provider in the NPPES registry on October 24, 2006.

Where is Matthews Gwynn located?

Matthews Gwynn practices at 990 Hammond Dr Ste 325, Atlanta, GA 30328. The listed phone number is (404) 256-3720.

What is Matthews Gwynn's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is Matthews Gwynn enrolled in Medicare?

Yes. Matthews Gwynn 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.

Is Matthews Gwynn affiliated with any hospitals?

According to CMS data, Matthews Gwynn is affiliated with Northside Hospital Cherokee and Northside Hospital.

When was this NPI record last updated?

The NPPES record for Matthews Gwynn was last updated on September 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.