Dr. Mark L. Williams, MD
- Medicare services, 2024
- 39
- Medicare patients, 2024
- 119
- Part D claims, 2021
- 17
- Hospital affiliations
- 2
- Industry payments
- $58
- Practice address
- 250 East Dunlap Avenue, Phoenix, AZ 85020
- Practice phone
- Call (602) 943-2381
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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 L. Williams is an anesthesiologist in Phoenix, Arizona
Dr. Williams practices at HonorHealth John C. Lincoln Medical Center in Phoenix, Arizona, part of HonorHealth.
Dr. Williams' NPI, 1679505440, was assigned on July 6, 2006. Dr. Williams holds Arizona license 22063.
- NPI
- 1679505440NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183780943
- NPI enumeration date
- July 6, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (602) 943-2381
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark L. Williams practices at HonorHealth John C. Lincoln Medical Center in Phoenix, Arizona
Dr. Williams' primary practice is HonorHealth John C. Lincoln Medical Center, at 250 East Dunlap Avenue, Phoenix, AZ 85020 in Maricopa County. The practice phone is (602) 943-2381.
- HonorHealth John C. Lincoln Medical Center250 East Dunlap Avenue, Phoenix, AZ 85020 · Maricopa CountyPhone(602) 943-2381
Source: Dmand AI Affiliation Data
Dr. Mark L. Williams is affiliated with 4 sites of care and 3 medical groups
Dr. Williams' primary practice is HonorHealth John C. Lincoln Medical Center in Phoenix, Arizona, part of HonorHealth. Dr. Williams is also affiliated with Methodist Richardson Medical Center. The medical group on file is Valley Anesthesiology Consultants. Dmand AI also links Dr. Williams to 2 more group practices and clinics and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark L. Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| HonorHealth John C. Lincoln Medical Center | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark L. Williams is one of 1,244 anesthesiologists in Arizona
Anesthesiology is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Williams is licensed in Arizona.
Specialties and state licenses
- Anesthesiology, ArizonaPrimary
Anesthesiologists near Dr. Williams
Counts of anesthesiologists 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 L. Williams billed Medicare for 39 services in 2024
CMS data shows 39 Medicare services from Dr. Williams across 3 procedure codes in 2024, for 119 Medicare patients. Medicare paid $10,009 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Williams' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 252024: 25No change
- Anesthesia
- 2023: 232024: 1439%
Dr. Williams compared with the Arizona median for anesthesiologists, 2024
- Dr. Williams
- Arizona median
- Medicare services
- 39vs 7246% below
- Medicare patients
- 119vs 13311% below
- Part D claims
- 17vs 2223% below
Medians across 1,218 anesthesiologists in Arizona 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 anesthesiologists in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark L. Williams treated 119 Medicare patients in 2024, average age 74
CMS counts 119 Medicare patients who saw Dr. Williams in 2024. The largest group is 65 to 74, with 54 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 9% are also on Medicaid. Their average risk score is 1.48, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 59, with 62% women.
Dr. Williams' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Williams' Medicare patients by sex, 2024
- Women6454%
- Men5546%
Chronic conditions among Dr. Williams' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis66%
- Ischemic heart disease39%
- Mood disorders32%
- Atrial fibrillation31%
- Depression31%
- Anxiety29%
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 59
Patient panel by sex, all payers
- Women62%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark L. Williams wrote 17 Medicare Part D claims in 2021
In 2021, Dr. Williams wrote 17 Medicare Part D claims. They cover 1 drug, with $271 in total drug cost. In 2019, CMS named 13 claims across 1 drug.
Dr. Williams' most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2019 to 2021
- 2019
- 2021
- Claims for drugs CMS names
- 2019: 132021: 1731%
Drugs named by CMS: 1 in 2021, 1 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Mark L. 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. Mark L. Williams received $58 in industry payments from 2020 to 2025
CMS Open Payments shows 3 general payments to Dr. Williams from 3 drug and device companies from 2020 to 2025. Education make up the largest share, 69% of the total. Merck Sharp & Dohme Corporation paid the most, $26.
General payments to Dr. Williams by program year, 2020 to 2025
General payments to Dr. Williams by kind, 2020 to 2025
- Education$4069%
- Food and beverage$1831%
Companies that paid Dr. Williams the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mark L. 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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) |
| 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 Dr. Mark L. 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 L. Williams' NPI number?
Dr. Mark L. Williams' NPI number is 1679505440. It was assigned on July 6, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark L. Williams?
Dr. Mark L. Williams is an anesthesiologist in Phoenix, Arizona. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Mark L. Williams practice?
Dr. Williams practices at 250 East Dunlap Avenue, Phoenix, AZ 85020. Dr. Williams' primary practice is HonorHealth John C. Lincoln Medical Center in Phoenix, Arizona, part of HonorHealth. Dmand AI also links Dr. Williams to 2 group practices and clinics and 2 medical groups.
What is Dr. Mark L. Williams' office phone number?
The practice phone on file for Dr. Williams is (602) 943-2381.
What is Dr. Mark L. Williams' medical license number?
Dr. Williams holds Arizona license 22063.
Which hospitals is Dr. Mark L. Williams affiliated with?
Dr. Williams practices at HonorHealth John C. Lincoln Medical Center in Phoenix, Arizona. Dr. Williams is also affiliated with Methodist Richardson Medical Center.
What medical group is Dr. Mark L. Williams part of?
Dr. Williams is linked to Valley Anesthesiology Consultants. Dmand AI links Dr. Williams to 2 more medical groups.
Does Dr. Mark L. Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 39 services in 2024, and Dr. Williams accepts Medicare assignment.
How many Medicare patients does Dr. Mark L. Williams see?
CMS counts 119 Medicare patients who saw Dr. Williams in 2024, with an average age of 74.
What services does Dr. Mark L. Williams bill to Medicare?
In 2024, Dr. Williams' most billed Medicare services were anesthesia (00670), surgery: heart and blood vessels (36620) and surgery: brain, spine and nerves (64488).
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What drugs does Dr. Mark L. Williams prescribe most?
In 2021 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Oxycodone-Acetaminophen.
Has Dr. Mark L. Williams received payments from drug or device companies?
CMS Open Payments shows $58 in general payments to Dr. Williams from 3 companies from 2020 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Mark L. Williams been practicing?
Dr. Williams graduated from medical school in 1986, 40 years ago.
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