Mark Williams, M.D.
NPI 1104820828 · Otolaryngology Physician · Lutherville, MD
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Williams, M.D. is a Otolaryngology Physician provider in Lutherville, MD (NPI 1104820828).
Provider details
- NPI number
- 1104820828
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- D0043030 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
21 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,465 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 743 | $132 |
| Removal of Impacted Ear Wax69210 | 368 | $46 |
| Exam of Ear Using a Microscope92504 | 298 | $30 |
| Comprehensive Hearing and Speech Recognition Test92557 | 216 | $37 |
| Test for Eardrum and Muscle Function92550 | 214 | $22 |
| Diagnostic Exam of Nasal Passages Using an Endoscope31231 | 193 | $194 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ipratropium Bromide | 55 | 18 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 31 | 21 |
| Fluticasone Propionate | 30 | 12 |
| Fluocinolone Acetonide Oil | 22 | 17 |
| Azelastine Hcl | 21 | 12 |
| Methylprednisolone | 21 | 20 |
| Montelukast Sodium | 20 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-09
- Last updated
- 2014-04-08
Frequently asked questions
- What is Mark Williams's NPI number?
- Mark Williams's National Provider Identifier (NPI) is 1104820828, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Williams's specialty?
- Mark Williams is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Williams located?
- Mark Williams's practice location on file with NPPES is 1205 York Rd, Lutherville, MD 21093-6211.
- What is Mark Williams's phone number?
- The practice phone number listed in the NPPES registry for Mark Williams is (410) 494-7060.
- Does Mark Williams accept Medicare?
- Mark Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Williams's NPI active?
- Yes — Mark Williams's NPI (1104820828) is active in the NPPES registry as of the last update on 2014-04-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.