Clin Rheumatol
Ambulatory CareAntibodies, AntinuclearBlack or African American
Dr. Francis M. Williams, MD
NPI1275519449PAC ID0941302814
- Medicare services, 2024
- 61
- Medicare patients, 2024
- 49
- Part D claims, 2024
- 4,588
- Publications
- 8
- Industry payments
- $78,896
- Practice address
- 19500 I-10 W, San Antonio, TX 78257
- Practice phone
- Call (210) 588-0122
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Wellmed Cardiology
San Antonio, Texas
Find Dr. Williams' professional email, personal email and mobile number
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Dr. Francis M. Williams is a rheumatologist in San Antonio, Texas
Dr. Williams practices at Wellmed Cardiology in San Antonio, Texas.
Dr. Williams' NPI, 1275519449, was assigned on December 20, 2005. Dr. Williams graduated from McGovern Medical School in 1992. Dr. Williams holds Texas license J4615.
NPI and contact details
- NPI
- 1275519449NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941302814
- NPI enumeration date
- December 20, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (210) 588-0122
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Francis M. Williams practices at Wellmed Cardiology in San Antonio, Texas
Dr. Williams' primary practice is Wellmed Cardiology, at 19500 I-10 W, San Antonio, TX 78257 in Bexar County. The practice phone is (210) 588-0122.
- Wellmed Cardiology19500 I-10 W, San Antonio, TX 78257 · Bexar CountyPhone(210) 588-0122
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Francis M. Williams is affiliated with 2 sites of care and 2 medical groups
Dr. Williams' primary practice is Wellmed Cardiology in San Antonio, Texas. The medical group on file is WellMed Medical Group. Dmand AI also links Dr. Williams to 1 more group practice or clinic and 1 medical group, each named with a free account.
Wellmed CardiologyPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Francis M. 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 |
|---|---|
| Wellmed Cardiology | 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. Francis M. Williams is one of 476 rheumatologists in Texas
Rheumatology is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Williams is board certified in rheumatology by the American Board of Internal Medicine. Dr. Williams is licensed in Texas.
Specialties and state licenses
- Rheumatology, TexasPrimary
Clinical focus
Dmand AI lists arteritis, arthritis, lupus, muscle disease, muscle pain, fibromyalgia, and limb pain, osteoporosis and rheumatoid arthritis among the conditions Dr. Williams treats.
Rheumatologists near Dr. Williams
Counts of rheumatologists 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. Francis M. Williams billed Medicare for 61 services in 2024
CMS data shows 61 Medicare services from Dr. Williams across 2 procedure codes in 2024, all of them office visits, for 49 Medicare patients. Medicare paid $5,604 for them. Every service was in an office.
Medicare services, 202461
Medicare patients49
Paid by Medicare$5,604
Procedure codes2
Dr. Williams' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 552024: 6111%
Dr. Williams compared with the Texas median for rheumatologists, 2024
- Dr. Williams
- Texas median
- Medicare services
- 61vs 1,33195% below
- Medicare patients
- 49vs 19675% below
- Part D claims
- 4,367vs 1,1383.8 times
Medians across 451 rheumatologists in Texas with Dmand AI profiles that report each measure.
Dr. Williams' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Williams and other rheumatologists in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Francis M. Williams treated 49 Medicare patients in 2024, average age 74
CMS counts 49 Medicare patients who saw Dr. Williams in 2024. The largest group is 65 to 74, with 22 patients. 75% of them have high cholesterol, and 73% have arthritis. Their average risk score is 1.45, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 71, with 80% women.
Medicare patients, 202449
Average age74
Average risk score1.45
Dr. Williams' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Williams' Medicare patients by sex, 2024
- Women3265%
- Men1735%
Chronic conditions among Dr. Williams' Medicare patients, 2024
- High cholesterol75%
- Arthritis73%
- High blood pressure65%
- Chronic kidney disease31%
- Diabetes31%
- Depression29%
- Mood disorders29%
- Osteoporosis22%
Share of Medicare patients with each condition. A patient can have several.
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 71
Patient panel by sex, all payers
- Women80%
- Men20%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Francis M. Williams wrote 4,588 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 4,588 Medicare Part D claims for 816 patients. 77% of them were for generic drugs. CMS names the drug for 4,367 of them, across 50 drugs with 11 or more claims each, at $4,871,646 in total drug cost. In 2023, CMS named 3,646 claims across 44 drugs.
Part D claims, 20244,588
Drugs named by CMS50
Total drug cost$4.9M
Part D patients816
Dr. Williams' Part D claims by kind of drug, 2024
- Generic3,545 claims77%
- Brand-name and other1,043 claims23%
Dr. Williams' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Williams' Part D claims, 2024
- Opioids3%116 of 4,588 claims
- Antibiotics0%11 of 4,588 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,6462024: 4,36720%
Drugs named by CMS: 50 in 2024, 44 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Francis M. Williams takes part in Medicare
Dr. Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Francis M. Williams has 8 publications on record
Dmand AI links 8 papers to Dr. Williams in 2020. The most frequent topics are HIV Infections, HIV-1 and Anti-HIV Agents. Dr. Williams has published most often in Arthritis Rheum. Dr. Williams' most frequent co-authors are John D. Reveille, MD, Philip R. Cohen, MD and Salahuddin Kazi, MD.
Papers8
Topics Dr. Williams writes about most
- HIV Infections
- HIV-1
- Anti-HIV Agents
- Anti-Inflammatory Agents
- Antiretroviral Therapy, Highly Active
- Black or African American
- Lymphocytosis
- Parotid Gland
Dr. Williams' most frequent co-authors
- John D. Reveille, MD6 shared papers
- Philip R. Cohen, MD2 shared papers
- Salahuddin Kazi, MD2 shared papers
Recent publications by Dr. Williams
Best Pract Res Clin Rheumatol
Antiretroviral Therapy, Highly ActiveArthritis, ReactiveHIV Infections
J Clin Rheumatol
Ambulatory Care FacilitiesHIV-1Osteoarthritis, Knee
Amino Acid SequenceAnti-Inflammatory AgentsBlack or African American
J Am Acad Dermatol
Antirheumatic AgentsArthritis, RheumatoidMethotrexate
See who Dr. Williams researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Williams works with, so you can find a warm path to the right rheumatologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Francis M. Williams received $78,896 in industry payments from 2016 to 2025
CMS Open Payments shows 192 general payments to Dr. Williams from 12 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 73% of the total. Amgen Inc. paid the most, $66,128.
General payments to Dr. Williams by program year, 2016 to 2025
General payments to Dr. Williams by kind, 2016 to 2025
$78.9Kin total
- Speaker and faculty fees$57,65873%
- Food and beverage$7,88310%
- Travel and lodging$7,1459%
- Honoraria$4,3806%
- Other$1,8302%
Companies that paid Dr. Williams the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Francis M. Williams has 1 award and honors on record
Dmand AI lists 1 award for Dr. Williams.
Awards and honors for Dr. Williams
- Undated
- Super Doc
Source: Dmand AI Professional Profile Data
Dr. Francis M. Williams graduated from McGovern Medical School
Dr. Williams graduated from McGovern Medical School in 1992.
- Medical school
- Board certified in rheumatology
Source: Dmand AI Professional Profile Data
Dr. Francis M. Williams accepts plans from 12 insurance carriers
Dr. Williams is in network with 12 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Cigna
- Elevance
- HCSC
- Alliant Health Plans
- Aspirus Health Plan
- +4 more carriersWith a free account
Plan types Dr. Williams accepts, by number of carriers
- HMO7
- PPO7
- EPO4
- Medicare4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Francis M. 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Francis M. 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. Francis M. Williams' NPI number?
Dr. Francis M. Williams' NPI number is 1275519449. It was assigned on December 20, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Francis M. Williams?
Dr. Francis M. Williams is a rheumatologist in San Antonio, Texas. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Francis M. Williams practice?
Dr. Williams practices at 19500 I-10 W, San Antonio, TX 78257. Dr. Williams' primary practice is Wellmed Cardiology in San Antonio, Texas. Dmand AI also links Dr. Williams to 1 group practice or clinic and 1 medical group.
What is Dr. Francis M. Williams' office phone number?
The practice phone on file for Dr. Williams is (210) 588-0122.
What is Dr. Francis M. Williams' medical license number?
Dr. Williams holds Texas license J4615.
What medical group is Dr. Francis M. Williams part of?
Dr. Williams is linked to WellMed Medical Group. Dmand AI links Dr. Williams to 1 more medical group.
Does Dr. Francis M. Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 61 services in 2024, and Dr. Williams accepts Medicare assignment.
How many Medicare patients does Dr. Francis M. Williams see?
CMS counts 49 Medicare patients who saw Dr. Williams in 2024, with an average age of 74.
Is Dr. Francis M. Williams board certified?
Yes. Dr. Williams is board certified in rheumatology by the American Board of Internal Medicine.
What services does Dr. Francis M. Williams bill to Medicare?
In 2024, Dr. Williams' most billed Medicare services were office visit, established patient (99214) and office visit, new patient (99204).
Show 7 more questionsShow fewer questions
Where did Dr. Francis M. Williams go to medical school?
Dr. Williams graduated from McGovern Medical School in 1992.
What drugs does Dr. Francis M. Williams prescribe most?
In 2024 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Methotrexate, Prednisone and Hydroxychloroquine Sulfate.
Has Dr. Francis M. Williams received payments from drug or device companies?
CMS Open Payments shows $78,896 in general payments to Dr. Williams from 12 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. Francis M. Williams been practicing?
Dr. Williams graduated from medical school in 1992, 34 years ago.
Does Dr. Francis M. Williams do research?
Dmand AI links 8 publications to Dr. Williams.
Who does Dr. Francis M. Williams publish with?
Dr. Williams' most frequent co-authors are John D. Reveille, MD (6 shared papers), Philip R. Cohen, MD (2 shared papers) and Salahuddin Kazi, MD (2 shared papers).
What insurance does Dr. Francis M. Williams accept?
Dr. Williams is in network with 12 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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