William Stephen Forness, FNP-C
- Part D claims, 2024
- 12
- Hospital affiliations
- 2
- Industry payments
- $41
- Medical groups
- 2
- State license
- 1
- Practice address
- 6420 Clayton Rd, Saint Louis, MO 63117
- Practice phone
- Call (314) 768-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find William Forness' 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.
William Stephen Forness is a family medicine physician in Saint Louis, Missouri
William Forness practices at SSM Health St. Mary's Hospital - St. Louis in Saint Louis, Missouri, part of SSM Health Care.
William Forness' NPI, 1386237097, was assigned on February 12, 2021. William Forness holds Missouri license F09191408.
- NPI
- 1386237097NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3375950009
- NPI enumeration date
- February 12, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 768-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
William Stephen Forness practices at SSM Health St. Mary's Hospital - St. Louis in Saint Louis, Missouri
William Forness' primary practice is SSM Health St. Mary's Hospital - St. Louis, at 6420 Clayton Rd, Saint Louis, MO 63117 in St. Louis County. The practice phone is (314) 768-8000.
- SSM Health St. Mary's Hospital - St. Louis6420 Clayton Rd, Saint Louis, MO 63117 · St. Louis CountyPhone(314) 768-8000
Source: Dmand AI Affiliation Data
William Stephen Forness is affiliated with 4 sites of care and 2 medical groups
William Forness' primary practice is SSM Health St. Mary's Hospital - St. Louis in Saint Louis, Missouri, part of SSM Health Care. William Forness is also affiliated with Mercy Hospital St. Louis. The medical group on file is Mercy Clinic Trauma and General Surgery. Dmand AI also links William Forness to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at William Stephen Forness' practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Forness practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSM Health St. Mary's Hospital - St. Louis | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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William Stephen Forness is one of 2,412 family medicine physicians in Missouri
Family medicine is William Forness' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. William Forness is licensed in Missouri.
Specialties and state licenses
- Family medicine, MissouriPrimary
Family medicine physicians near William Forness
Counts of family medicine physicians 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
William Stephen Forness' patients have a median age of 61
Across all payers, Dmand AI patient panel data puts William Forness' median patient age at 61, with 38% women.
William Forness' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women38%
- Men60%
Source: Dmand AI Patient Panel Data
William Stephen Forness wrote 12 Medicare Part D claims in 2024
In 2024, William Forness wrote 12 Medicare Part D claims. 100% of them were for generic drugs.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How William Stephen Forness takes part in Medicare
William Forness 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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William Stephen Forness received $41 in industry payments from 2024 to 2025
CMS Open Payments shows 2 general payments to William Forness from 2 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Baxter Healthcare paid the most, $25.
General payments to William Forness by program year, 2024 to 2025
Companies that paid William Forness the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for William Stephen Forness'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 William Stephen Forness
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is William Stephen Forness' NPI number?
William Stephen Forness' NPI number is 1386237097. It was assigned on February 12, 2021, and it is active in the NPI Registry.
What does William Stephen Forness specialize in?
William Stephen Forness is a family medicine physician in Saint Louis, Missouri. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does William Stephen Forness practice?
William Forness practices at 6420 Clayton Rd, Saint Louis, MO 63117. William Forness' primary practice is SSM Health St. Mary's Hospital - St. Louis in Saint Louis, Missouri, part of SSM Health Care. Dmand AI also links William Forness to 2 group practices and clinics and 1 medical group.
What is William Stephen Forness' office phone number?
The practice phone on file for William Forness is (314) 768-8000.
What is William Stephen Forness' medical license number?
William Forness holds Missouri license F09191408.
Which hospitals is William Stephen Forness affiliated with?
William Forness practices at SSM Health St. Mary's Hospital - St. Louis in Saint Louis, Missouri. William Forness is also affiliated with Mercy Hospital St. Louis.
What medical group is William Stephen Forness part of?
William Forness is linked to Mercy Clinic Trauma and General Surgery. Dmand AI links William Forness to 1 more medical group.
Does William Stephen Forness accept Medicare?
Yes. CMS lists William Forness as accepting Medicare assignment.
Has William Stephen Forness received payments from drug or device companies?
CMS Open Payments shows $41 in general payments to William Forness from 2 companies from 2024 to 2025. The largest total came from Baxter Healthcare.
How long has William Stephen Forness been practicing?
William Forness graduated from medical school in 2016, 10 years ago.
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