Physician Profile
Unclaimed ProfileAbout WILLIAMS
Based in Johnson City, TN, Mark A Williams, MD is listed in the NPI registry under internal medicine. Mark graduated from University of Tennessee, Hsc, College of Medicine in 1992. According to Medicare claims data, Mark cared for 3,488 Medicare patients across 5,776 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (423) 794-5520
- Email not available
Practice Locations
301 MED TECH PKWY STE 240
Johnson City, TN 37604
Procedures Most Often Billed to Medicare
5,776 services · 3,488 patients · 25 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
692 |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
201 |
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
65 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
48 |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | Drug given | J3301 |
276 |
| Injection, dexamethasone sodium phosphate, 1 mg | Drug given | J1100 |
191 |
| Injection, ceftriaxone sodium, per 250 mg | Drug given | J0696 |
98 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
671 |
| Blood test, comprehensive group of blood chemicals | Lab test | 80053 |
581 |
| Blood test, lipids (cholesterol and triglycerides) | Lab test | 80061 |
439 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internal medicines at this location 8
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 6
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 30 related providers in 4 groups
Other internal medicines in Johnson City 7
Same specialty, same city.
Trained at University of Tennessee, Hsc, College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1992 at University of Tennessee, Hsc, College of Medicine 7
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in TN who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Williams?
Dr. Williams is an internal medicine in Johnson City, TN. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
What is Dr. Williams's address?
Dr. Williams is listed at 301 MED TECH PKWY STE 240, Johnson City, TN 37604. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Williams?
The number on file is (423) 794-5520. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Williams's NPI number?
Dr. Williams's National Provider Identifier is 1033114988. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Williams train?
Dr. Williams attended University of Tennessee, Hsc, College of Medicine, graduating in 1992. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Williams been practicing?
Dr. Williams has 34 years experience. Calculated from a graduation year of 1992, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Williams perform?
According to Medicare billing data, Dr. Williams performs procedures including insertion of needle into vein for collection of blood sample; provides treatments such as injection of drug or substance under skin or into muscle and influenza vaccine split virus, preservative free, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Williams confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Williams. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.