William Keith Marek, PhD
- Medicare patients, 2024
- 176
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2008
- Practice address
- 4633 Old Ironsides Dr Suite 304 Suite 304, Santa Clara, CA 95054-1846
- Practice phone
- Call (866) 280-0260
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Rula Health
Behavioral health practice · Santa Clara, California
Find William Marek's 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 Keith Marek is a psychologist in San Francisco, California
William Marek practices at Rula Health in Santa Clara, California.
William Marek's NPI, 1851560544, was assigned on February 27, 2008. William Marek holds California license PSY 14791.
- NPI
- 1851560544NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6709965486
- NPI enumeration date
- February 27, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (866) 280-0260
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
William Keith Marek practices in Santa Clara and San Francisco
William Marek's primary practice is Rula Health, at 4633 Old Ironsides Dr Suite 304 Suite 304, Santa Clara, CA 95054-1846. The practice phone is (866) 280-0260. The NPI Registry lists William Marek's practice address as 2333 Buchanan St, San Francisco, CA 94115.
- Rula HealthPrimary4633 Old Ironsides Dr Suite 304 Suite 304, Santa Clara, CA 95054-1846Phone(866) 280-0260
- NPI Registry address2333 Buchanan St, San Francisco, CA 94115 · San Francisco County
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
William Keith Marek is affiliated with 1 site of care and 1 medical group
William Marek's primary practice is Rula Health in Santa Clara, California. The medical group on file is Rula Health.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at William Keith Marek's practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Marek practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Rula Health | Available with a free account |
Source: Dmand AI Technology Install Data
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William Keith Marek is one of 1,724 psychologists in California
Psychologist is William Marek's primary specialty in the NPI Registry, under taxonomy code 103T00000X. William Marek is licensed in California.
Specialties and state licenses
- Psychologist, CaliforniaPrimary
Psychologists near William Marek
Counts of psychologists 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 Keith Marek treated 176 Medicare patients in 2024, average age 79
CMS counts 176 Medicare patients who saw William Marek in 2024. The largest group is 75 to 84, with 58 patients. 75% of them have depression, and 75% have high blood pressure. 79% are also on Medicaid. Their average risk score is 2.23, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts William Marek's median patient age at 71, with 100% women.
William Marek's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
William Marek's Medicare patients by sex, 2024
- Women9755%
- Men7945%
Chronic conditions among William Marek's Medicare patients, 2024
- Depression75%
- High blood pressure75%
- Mood disorders75%
- High cholesterol67%
- Alzheimer's and dementia56%
- Arthritis49%
- Anxiety48%
- Chronic kidney disease48%
Share of Medicare patients with each condition. A patient can have several.
William Marek's 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
- Women100%
- Men0%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
William Keith Marek offers telehealth to Medicare patients
William Marek accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists William Marek as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for William Keith Marek'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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - 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) |
| 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 Keith Marek
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 Keith Marek's NPI number?
William Keith Marek's NPI number is 1851560544. It was assigned on February 27, 2008, and it is active in the NPI Registry.
What does William Keith Marek specialize in?
William Keith Marek is a psychologist in San Francisco, California. The primary specialty in the NPI Registry is Psychologist (taxonomy code 103T00000X).
Where does William Keith Marek practice?
William Marek practices at 4633 Old Ironsides Dr Suite 304 Suite 304, Santa Clara, CA 95054-1846. William Marek also practices at 2333 Buchanan St, San Francisco, CA 94115. William Marek's primary practice is Rula Health in Santa Clara, California.
What is William Keith Marek's office phone number?
The practice phone on file for William Marek is (866) 280-0260.
What is William Keith Marek's medical license number?
William Marek holds California license PSY 14791.
What medical group is William Keith Marek part of?
William Marek is linked to Rula Health.
Does William Keith Marek accept Medicare?
Yes. CMS lists William Marek as accepting Medicare assignment.
Does William Keith Marek offer telehealth?
Yes. The CMS Doctors and Clinicians file lists William Marek as offering telehealth services.
How many Medicare patients does William Keith Marek see?
CMS counts 176 Medicare patients who saw William Marek in 2024, with an average age of 79.
How long has William Keith Marek been practicing?
William Marek graduated from medical school in 1989, 37 years ago.
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