Mark A. Williams, CADC
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2010
- Practice address
- 7 Railroad Ave, Middletown, NY 10940
- Practice phone
- Call (877) 451-7337
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Millennium Health
Middletown, New York
Find Mark 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.
Mark A. Williams is a mental health counselor in Middletown, New York
Mark Williams practices at Millennium Health in Middletown, New York.
Mark Williams' NPI, 1598065807, was assigned on November 2, 2010.
- NPI
- 1598065807NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4981106317
- NPI enumeration date
- November 2, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (877) 451-7337
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Mark A. Williams practices at Millennium Health in Middletown, New York
Mark Williams' primary practice is Millennium Health, at 7 Railroad Ave, Middletown, NY 10940 in Orange County. The practice phone is (877) 451-7337.
- Millennium Health7 Railroad Ave, Middletown, NY 10940 · Orange CountyPhone(877) 451-7337
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Mark A. Williams is affiliated with 1 site of care and 1 medical group
Mark Williams' primary practice is Millennium Health in Middletown, New York. The medical group on file is Rimrock Trails.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Mark A. Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mark Williams practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Millennium Health | Available with a free account |
Source: Dmand AI Technology Install Data
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Mark A. Williams is one of 6,506 mental health counselors in New York
Mental health is Mark Williams' primary specialty in the NPI Registry, under taxonomy code 101YM0800X. Mark Williams has a license on file in Oregon.
Specialties and state licenses
- Mental health counselor, Oregon
Mental health counselors near Mark Williams
Counts of mental health counselors 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
Mark A. Williams' patients have a median age of 19
Across all payers, Dmand AI patient panel data puts Mark Williams' median patient age at 19, with 55% women.
Mark Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 19
Patient panel by sex, all payers
- Women55%
- Men45%
Source: Dmand AI Patient Panel Data
How Mark A. Williams takes part in Medicare
Mark 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)
Sources for Mark A. 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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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 Mark A. 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 Mark A. Williams' NPI number?
Mark A. Williams' NPI number is 1598065807. It was assigned on November 2, 2010, and it is active in the NPI Registry.
What does Mark A. Williams specialize in?
Mark A. Williams is a mental health counselor in Middletown, New York. The primary specialty in the NPI Registry is Mental Health Counselor (taxonomy code 101YM0800X).
Where does Mark A. Williams practice?
Mark Williams practices at 7 Railroad Ave, Middletown, NY 10940. Mark Williams' primary practice is Millennium Health in Middletown, New York.
What is Mark A. Williams' office phone number?
The practice phone on file for Mark Williams is (877) 451-7337.
What medical group is Mark A. Williams part of?
Mark Williams is linked to Rimrock Trails.
Does Mark A. Williams accept Medicare?
Yes. CMS lists Mark Williams as accepting Medicare assignment.
How long has Mark A. Williams been practicing?
Mark Williams graduated from medical school in 2007, 19 years ago.
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