Dr. Mark David Williams, MD
- Medicare services, 2019
- 14
- Part D claims, 2024
- 12
- Industry payments
- $242
- Affiliated sites
- 1
- Medical groups
- 2
- Practice address
- 1000 Medical Center Blvd, Lawrenceville, GA 30046
- Practice phone
- Call (678) 312-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northside Hospital Gwinnett
Lawrenceville, Georgia
Find Dr. Williams' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark David Williams is an OB-GYN in Lawrenceville, Georgia
Dr. Williams practices at Northside Hospital Gwinnett in Lawrenceville, Georgia.
Dr. Williams' NPI, 1447663679, was assigned on June 5, 2014. Dr. Williams graduated from Howard University College of Medicine in 2014. Dr. Williams holds Georgia license 87944.
- NPI
- 1447663679NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3779877709
- NPI enumeration date
- June 5, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (678) 312-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark David Williams practices at Northside Hospital Gwinnett in Lawrenceville, Georgia
Dr. Williams' primary practice is Northside Hospital Gwinnett, at 1000 Medical Center Blvd, Lawrenceville, GA 30046 in Gwinnett County. The practice phone is (678) 312-1000.
- Northside Hospital Gwinnett1000 Medical Center Blvd, Lawrenceville, GA 30046 · Gwinnett CountyPhone(678) 312-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark David Williams is affiliated with 2 sites of care and 2 medical groups
Dr. Williams' primary practice is Northside Hospital Gwinnett in Lawrenceville, Georgia. The medical group on file is Northside Hospital Atlanta. Dmand AI also links Dr. Williams to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark David Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northside Hospital Gwinnett | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark David Williams is one of 1,235 OB-GYNs in Georgia
Obstetrics and gynecology is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Williams is licensed in Georgia.
Specialties and state licenses
- Obstetrics and gynecology, GeorgiaPrimary
OB-GYNs near Dr. Williams
Counts of OB-GYNs with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark David Williams billed Medicare for 14 services in 2019
CMS data shows 14 Medicare services from Dr. Williams across 1 procedure code in 2019, all of them office visits. Medicare paid $540 for them. Every service was in an office.
Dr. Williams compared with the Georgia median for OB-GYNs, 2019
- Dr. Williams
- Georgia median
- Medicare services
- 14vs 5273% below
Medians across 1,049 OB-GYNs in Georgia with Dmand AI profiles that report each measure.
Dr. Williams' most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Williams?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Williams and other OB-GYNs in Georgia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark David Williams' patients have a median age of 38
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 38, with 91% women.
Dr. Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 38
Patient panel by sex, all payers
- Women91%
- Men9%
Source: Dmand AI Patient Panel Data
Dr. Mark David Williams wrote 12 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 12 Medicare Part D claims. 100% of them were for generic drugs.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Mark David Williams takes part in Medicare
Dr. Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of the uterus: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Mark David Williams received $242 in industry payments from 2022 to 2025
CMS Open Payments shows 10 general payments to Dr. Williams from 5 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 100% of the total. Medtronic, Inc. paid the most, $162.
General payments to Dr. Williams by program year, 2022 to 2025
Companies that paid Dr. Williams the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark David Williams graduated from Howard University College of Medicine
Dr. Williams graduated from Howard University College of Medicine in 2014.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark David Williams's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mark David Williams
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mark David Williams' NPI number?
Dr. Mark David Williams' NPI number is 1447663679. It was assigned on June 5, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark David Williams?
Dr. Mark David Williams is an OB-GYN in Lawrenceville, Georgia. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Mark David Williams practice?
Dr. Williams practices at 1000 Medical Center Blvd, Lawrenceville, GA 30046. Dr. Williams' primary practice is Northside Hospital Gwinnett in Lawrenceville, Georgia. Dmand AI also links Dr. Williams to 1 group practice or clinic and 1 medical group.
What is Dr. Mark David Williams' office phone number?
The practice phone on file for Dr. Williams is (678) 312-1000.
What is Dr. Mark David Williams' medical license number?
Dr. Williams holds Georgia license 87944.
What medical group is Dr. Mark David Williams part of?
Dr. Williams is linked to Northside Hospital Atlanta. Dmand AI links Dr. Williams to 1 more medical group.
Does Dr. Mark David Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 14 services in 2019, and Dr. Williams accepts Medicare assignment.
What services does Dr. Mark David Williams bill to Medicare?
In 2019, Dr. Williams' most billed Medicare services were office visit, established patient (99213).
Where did Dr. Mark David Williams go to medical school?
Dr. Williams graduated from Howard University College of Medicine in 2014.
Has Dr. Mark David Williams received payments from drug or device companies?
CMS Open Payments shows $242 in general payments to Dr. Williams from 5 companies from 2022 to 2025. The largest total came from Medtronic, Inc.
How long has Dr. Mark David Williams been practicing?
Dr. Williams graduated from medical school in 2014, 12 years ago.
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