Dr. Mark Frederic Williams, MD
- Medicare services, 2024
- 2,465
- Medicare patients, 2024
- 613
- Part D claims, 2024
- 380
- Hospital affiliations
- 1
- Industry payments
- $122
- Practice address
- 1205 York Rd, Baltimore, MD 21093
- Practice phone
- Call (410) 494-7060
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Drs. Price & Williams
Audiology & hearing practice · Baltimore, Maryland
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 Frederic Williams is an otolaryngologist in Lutherville Timonium, Maryland
Dr. Williams practices at Drs. Price & Williams in Baltimore, Maryland.
Dr. Williams' NPI, 1104820828, was assigned on June 9, 2005. Dr. Williams graduated from Medical College of Georgia School of Medicine in 1988. Dr. Williams holds Maryland license D0043030.
- NPI
- 1104820828NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1355520933
- NPI enumeration date
- June 9, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (410) 494-7060
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Frederic Williams practices at Drs. Price & Williams in Baltimore, Maryland
Dr. Williams' primary practice is Drs. Price & Williams, at 1205 York Rd, Baltimore, MD 21093. The practice phone is (410) 494-7060.
- Drs. Price & Williams1205 York Rd, Baltimore, MD 21093Phone(410) 494-7060
Source: Dmand AI Affiliation Data
Dr. Mark Frederic Williams is affiliated with 3 sites of care and 2 medical groups
Dr. Williams' primary practice is Drs. Price & Williams in Baltimore, Maryland. Dr. Williams is also affiliated with Sentara RMH Medical Center. The medical group on file is Greater Baltimore Medical Center (GBMC). Dmand AI also links Dr. Williams to 1 more group practice or clinic and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark Frederic Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Drs. Price & Williams | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Frederic Williams is one of 213 otolaryngologists in Maryland
Otolaryngology is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207Y00000X. Dr. Williams is licensed in Maryland.
Specialties and state licenses
- Otolaryngology, MarylandPrimary
Otolaryngologists near Dr. Williams
Counts of otolaryngologists 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 Frederic Williams billed Medicare for 2,465 services in 2024
CMS data shows 2,465 Medicare services from Dr. Williams across 12 procedure codes in 2024, for 613 Medicare patients. Medicare paid $166,081 for them. Every service was in an office.
Dr. Williams' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9562024: 1,0116%
- Tests and treatments
- 2023: 6442024: 72813%
- Surgery
- 2023: 6322024: 6665%
- Other services
- 2023: 482024: 6025%
Dr. Williams compared with the Maryland median for otolaryngologists, 2024
- Dr. Williams
- Maryland median
- Medicare services
- 2,465vs 8023.1 times
- Medicare patients
- 613vs 40651% above
- Part D claims
- 283vs 17661% above
Medians across 207 otolaryngologists in Maryland 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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Frederic Williams treated 613 Medicare patients in 2024, average age 76
CMS counts 613 Medicare patients who saw Dr. Williams in 2024. The largest group is 65 to 74, with 247 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 5% are also on Medicaid. Their average risk score is 0.97, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 70, with 53% women.
Dr. Williams' Medicare patients by age, 2024
Dr. Williams' Medicare patients by sex, 2024
- Women34055%
- Men27345%
Chronic conditions among Dr. Williams' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis48%
- Ischemic heart disease33%
- Diabetes29%
- Anxiety23%
- Mood disorders21%
- Atrial fibrillation19%
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 70
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Frederic Williams wrote 380 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 380 Medicare Part D claims for 165 patients. 96% of them were for generic drugs. CMS names the drug for 283 of them, across 12 drugs with 11 or more claims each, at $7,512 in total drug cost. In 2023, CMS named 198 claims across 9 drugs.
Dr. Williams' Part D claims by kind of drug, 2024
- Generic363 claims96%
- Brand-name17 claims4%
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
- Antibiotics25%95 of 380 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: 1982024: 28343%
Drugs named by CMS: 12 in 2024, 9 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
Dr. Mark Frederic Williams offers telehealth to Medicare patients
Dr. Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Williams as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Mark Frederic Williams received $122 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Williams from 1 drug or device company in 2017. Travel and lodging make up the largest share, 100% of the total. Intersect ENT, Inc. paid the most, $122.
Companies that paid Dr. Williams the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark Frederic Williams graduated from Medical College of Georgia School of Medicine
Dr. Williams graduated from Medical College of Georgia School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Frederic 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 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Mark Frederic 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 Frederic Williams' NPI number?
Dr. Mark Frederic Williams' NPI number is 1104820828. It was assigned on June 9, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Frederic Williams?
Dr. Mark Frederic Williams is an otolaryngologist in Lutherville Timonium, Maryland. The primary specialty in the NPI Registry is Otolaryngology Physician (taxonomy code 207Y00000X).
Where does Dr. Mark Frederic Williams practice?
Dr. Williams practices at 1205 York Rd, Baltimore, MD 21093. Dr. Williams' primary practice is Drs. Price & Williams in Baltimore, Maryland. Dmand AI also links Dr. Williams to 1 group practice or clinic and 1 medical group.
What is Dr. Mark Frederic Williams' office phone number?
The practice phone on file for Dr. Williams is (410) 494-7060.
What is Dr. Mark Frederic Williams' medical license number?
Dr. Williams holds Maryland license D0043030.
Which hospitals is Dr. Mark Frederic Williams affiliated with?
Dr. Williams is affiliated with Sentara RMH Medical Center.
What medical group is Dr. Mark Frederic Williams part of?
Dr. Williams is linked to Greater Baltimore Medical Center (GBMC). Dmand AI links Dr. Williams to 1 more medical group.
Does Dr. Mark Frederic Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 2,465 services in 2024, and Dr. Williams accepts Medicare assignment.
Does Dr. Mark Frederic Williams offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Williams as offering telehealth services.
How many Medicare patients does Dr. Mark Frederic Williams see?
CMS counts 613 Medicare patients who saw Dr. Williams in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. Mark Frederic Williams bill to Medicare?
In 2024, Dr. Williams' most billed Medicare services were office visit, established patient (99214), surgery: ear (69210) and ear, nose and throat service (92504).
Where did Dr. Mark Frederic Williams go to medical school?
Dr. Williams graduated from Medical College of Georgia School of Medicine in 1988.
What drugs does Dr. Mark Frederic Williams prescribe most?
In 2024 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Ipratropium Bromide, Amoxicillin-Clavulanate Potass and Fluticasone Propionate.
Has Dr. Mark Frederic Williams received payments from drug or device companies?
CMS Open Payments shows $122 in general payments to Dr. Williams from 1 company from 2017 to 2017. The largest total came from Intersect ENT, Inc.
How long has Dr. Mark Frederic Williams been practicing?
Dr. Williams graduated from medical school in 1988, 38 years ago.
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