Physician Profile
Unclaimed ProfileAbout GREGORY
Mark H Gregory, MD is a healthcare provider in Saint Louis, MO specialising in internal medicine. Mark trained at University of Vermont College of Medicine, graduating in 1986.
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
Common questions
What is Dr. Gregory's specialty?
Dr. Gregory is an internal medicine in Saint Louis, MO. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where can I find Dr. Gregory?
Dr. Gregory is listed at 555 N NEW BALLAS RD SUITE 110, Saint Louis, MO 63141. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Gregory?
The number on file is (314) 872-8470. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Gregory?
Dr. Gregory's National Provider Identifier is 1104843663. 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
What is Dr. Gregory's medical education?
Dr. Gregory attended University of Vermont College of Medicine, graduating in 1986. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Gregory have?
Dr. Gregory has 40 years experience. Calculated from a graduation year of 1986, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Gregory known for?
According to Medicare billing data, Dr. Gregory performs procedures including insertion of needle into vein for collection of blood sample; provides treatments such as administration of psychological or neuropsychological test by technician, first 30 minutes 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
Is Dr. Gregory's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Gregory. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (314) 872-8470
- Email not available
Practice Locations
555 N NEW BALLAS RD SUITE 110
Saint Louis, MO 63141
Procedures Most Often Billed to Medicare
2,696 services · 2,113 patients · 17 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
472 |
| Administration of psychological or neuropsychological test by technician, first 30 minutes | Treatment | 96138 |
132 |
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
118 |
| Admn sarscov2 vacc 1 dose | Treatment | 90480 |
77 |
| Sarscv2 vac 30mcg trs-suc im | Treatment | 91320 |
76 |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | Treatment | 90677 |
35 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
457 |
| Automated urinalysis test | Lab test | 81003 |
269 |
| Annual alcohol misuse screening, 5 to 15 minutes | Billing code | G0442 |
207 |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
193 |
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 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
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 — 31 related providers in 4 groups
Other internal medicines in Saint Louis 8
Same specialty, same city.
Trained at University of Vermont College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1986 at University of Vermont 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 MO who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.