DR. MARGARET WILLIAMSON M.D.
NPI 1093855884
Internal Medicine - Infectious Disease in Atlanta, GA

Active since February 08, 2007PECOS EnrolledAccepts Medicare Assignment
86.4/100
CMS Quality Rating
5673 PEACHTREE DUNWOODY RD, SUITE #600, ATLANTA, GA 30342(404) 256-4111(404) 256-0040 Get Directions Write a Review

NPPES record last updated: January 17, 2024. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Margaret Williamson M.d. NPPES

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

DR. MARGARET WILLIAMSON M.D. (NPI 1093855884) is an individual infectious disease provider in Atlanta, Georgia, licensed in Georgia (042143) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS, is affiliated with Northside Hospital Forsyth, and is a graduate of Emory University School Of Medicine (1993).

NPPES Registry Identity

NPI1093855884
Entity TypeIndividualFemale
Primary Taxonomy207RI0200X
Provider Legal NameDR. MARGARET WILLIAMSONCredential: M.D.
Location Address5673 PEACHTREE DUNWOODY RD, SUITE #600Atlanta, GA 30342-1731
Mailing Address5673 Peachtree Dunwoody Rd, Suite 600Atlanta, GA 30342-1731 · (404) 876-9223
Fax(404) 256-0040
Sole ProprietorNo
Medical School CMSEmory University School Of MedicineGraduated 1993
Enumeration DateFebruary 8, 2007
Last NPPES UpdateJanuary 17, 2024
NPPES CertifiedJanuary 17, 2024
NPI 1093855884 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License Licensed in GA · 042143
Definition

An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

5673 PEACHTREE DUNWOODY RD, Atlanta, GA 30342

Other Identifiers 1

Medicaid303710200AGA

Accepted Insurance

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. Margaret Williamson 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 ID7911982368
PECOS Enrollment IDI20040621001363
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 8

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 hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
745 services174 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.
296 services135 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
119 services51 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
115 services94 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.
53 services30 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.
49 services31 patients

Hospital Affiliations CMS Care Compare 5

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

Northside Hospital Forsyth

Acute Care Hospitals · Cumming, GA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number110005
Location1200 Northside Forsyth DriveCumming, GA 30041 · Forsyth County
Birthing friendly

Emory University Hospital Midtown

Acute Care Hospitals · Atlanta, GA
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number110078
Location550 Peachtree Street, NEAtlanta, GA 30308 · Fulton County
Emergency services Birthing friendly

Saint Joseph's Hospital Of Atlanta, Inc

Acute Care Hospitals · Atlanta, GA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number110082
Location5665 Peachtree Dunwoody RoadAtlanta, GA 30342 · Fulton County
Emergency services

Memorial Health Meadows Hospital

Acute Care Hospitals · Vidalia, GA
5/5 CMS rating
OwnershipProprietary
CMS Certification Number110128
LocationOne Meadows ParkwayVidalia, GA 30474 · Toombs County
Emergency services

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 30342 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.

86.4/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality55.18
Promoting Interoperability100
Improvement Activities40
Cost82.82

Other Providers at the Same Location NPPES 20

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

Otolaryngology
5673 PEACHTREE DUNWOODY RD, STE 150
ATLANTA, GA 30342
Anesthesiology
5673 PEACHTREE DUNWOODY RD, STE 910
ATLANTA, GA 30342
Surgery
5673 PEACHTREE DUNWOODY RD
ATLANTA, GA 30342
Internal Medicine (Infectious Disease)
5673 PEACHTREE DUNWOODY RD, SUITE 600
ATLANTA, GA 30342
Preventive Medicine (Public Health & General Preventive Medicine)
5673 PEACHTREE DUNWOODY RD, SUITE 330
ATLANTA, GA 30342
Urology
5673 PEACHTREE DUNWOODY RD, STE 910
ATLANTA, GA 30342
Plastic Surgery
5673 PEACHTREE DUNWOODY RD, SUITE 870
ATLANTA, GA 30342
Otolaryngology
5673 PEACHTREE DUNWOODY RD, STE 150
ATLANTA, GA 30342

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 Margaret Williamson's NPI number?

The NPI number for Margaret Williamson is 1093855884. It was assigned to this individual provider in the NPPES registry on February 8, 2007.

Where is Margaret Williamson located?

Margaret Williamson practices at 5673 Peachtree Dunwoody Rd Suite #600, Atlanta, GA 30342. The listed phone number is (404) 256-4111.

What is Margaret Williamson's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Margaret Williamson enrolled in Medicare?

Yes. Margaret Williamson 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.

What insurance does Margaret Williamson accept?

Health plans from Ambetter Health, Ambetter from Absolute Total Care, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee list Margaret Williamson 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 Margaret Williamson affiliated with any hospitals?

According to CMS data, Margaret Williamson is affiliated with Northside Hospital Forsyth, Emory University Hospital Midtown, Saint Joseph's Hospital Of Atlanta, Inc, Memorial Health Meadows Hospital and Northside Hospital.

When was this NPI record last updated?

The NPPES record for Margaret Williamson was last updated on January 17, 2024. NPI Profile syncs with the weekly NPPES data releases published by CMS.