Doctor profile · Federal record
Dr. Margaret Williamson, M.D.
Infectious Disease Physician (CMS: Infectious Disease) · Atlanta, GA
- NPI 1093855884
- Accepts Medicare
- MIPS 81.4 / 100 · 2023
- 33 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
5673 Peachtree Dunwoody RD, Suite #600
Atlanta, GA 303421731
(404) 256-4111
fax (404) 256-0040
Credentials & registration
- NPI registered
- February 2007 — 19 yrs on file
- Profile last updated
- January 17, 2024
- Year of graduation
- 1993 — 33 yrs since
- Specialty taxonomy
- 207RI0200X — NUCC code
- State license (1)
- Georgia #042143
- Medicaid
- GA #303710200A
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1093855884. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,276
Distinct HCPCS
9
Medicare allowed
$129,564
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 654 | 169 | $79 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 264 | 110 | $129 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 116 | 50 | $120 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 104 | 96 | $131 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 34 | 27 | $176 | |
96372 |
Injection of drug or substance under skin or into muscle | 33 | 11 | $14 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 30 | 23 | $87 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 25 | 24 | $174 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 16 | 16 | $168 |
In context: peer comparison
Among 38 peers in this city , average services per provider: 135. This provider delivers 9.5× the peer median.Open Payments
Industry payments received
All-time total
$22
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ViiV Healthcare Company | 1 | $22.23 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
398
Patients
138
Total drug cost
$351,033
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Biktarvy (Bictegrav/Emtricit/Tenofov Ala) | Brand | 41 | 0 | $165,879 |
| Sulfamethoxazole-Trimethoprim (Sulfamethoxazole/Trimethoprim) | Brand | 38 | 15 | $274 |
| Doxycycline Hyclate | Generic | 37 | 0 | $1,540 |
| Descovy (Emtricitabine/Tenofov Alafenam) | Brand | 32 | 0 | $75,867 |
| Cefadroxil | Generic | 31 | 19 | $501 |
| Vancomycin Hcl | Generic | 28 | 14 | $7,686 |
| Ceftriaxone (Ceftriaxone Sodium) | Brand | 25 | 11 | $5,635 |
| Azithromycin | Generic | 24 | 0 | $284 |
| Cefdinir | Generic | 24 | 17 | $671 |
| Ertapenem (Ertapenem Sodium) | Brand | 22 | 12 | $20,546 |
Hospital affiliations
Frequently asked questions
What is Dr. Margaret Williamson's medical specialty?
Dr. Margaret Williamson practices Infectious Disease Physician in Atlanta, GA.
Where does Dr. Margaret Williamson practice?
Dr. Margaret Williamson practices at 5673 Peachtree Dunwoody RD, Atlanta, GA 303421731. Office phone: 4042564111.
What is Dr. Margaret Williamson's NPI?
Dr. Margaret Williamson's National Provider Identifier (NPI) is 1093855884, issued by NPPES.
Does Dr. Margaret Williamson accept Medicare assignment?
Yes. Dr. Margaret Williamson accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Margaret Williamson commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233). Source: CMS Medicare Physician & Other Practitioners file.