Doctor profile · Federal record
Dr. Mark Vandewalker, M.D.
Allergy Physician (CMS: Allergy/Immunology) · Columbia, MO
- NPI 1386833358
- Accepts Medicare
- 52 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
601 W Nifong Blvd, Suite 2B
Columbia, MO 652036804
(573) 446-7000
fax (573) 445-1000
Credentials & registration
- NPI registered
- October 2007 — 19 yrs on file
- Year of graduation
- 1974 — 52 yrs since
- Specialty taxonomy
- 207KA0200X — NUCC code
- State license (1)
- Missouri #R2F17
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1386833358. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
6,812
Distinct HCPCS
10
Medicare allowed
$72,219
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
95165 |
Professional service for preparation and provision of 1 or more antigens | 2,461 | 152 | $13 | |
95004 |
Test for allergy using allergenic extract | 2,070 | 53 | $3 | |
95115 |
Professional service for single injection of allergen | 1,791 | 102 | $9 | |
95117 |
Professional service for multiple injections of allergen | 278 | 23 | $10 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 108 | 103 | $82 | |
94010 |
Test to measure expiratory airflow and volume | 29 | 28 | $24 | |
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 27 | 27 | $48 | |
99211 |
Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional | 19 | 19 | $21 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 15 | 15 | $103 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 14 | 14 | $154 |
In context: peer comparison
Among 2 peers in Columbia Allergy Physician, average services per provider: 1,847. This provider delivers 3.7× the peer median.Open Payments
Industry payments received
All-time total
$409
Transactions
20
Manufacturers
8
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| AstraZeneca Pharmaceuticals Lp | 8 | $143.81 | |
| Genentech USA, INC. | 2 | $77.16 | |
| Genzyme Corporation | 3 | $63.45 | |
| Regeneron Healthcare Solutions, INC. | 2 | $39.10 | |
| GlaxoSmithKline, LLC. | 2 | $36.57 | |
| Takeda Pharmaceuticals U.S.A., INC. | 1 | $17.60 | |
| Octapharma USA, INC. | 1 | $16.20 | |
| Abbvie INC. | 1 | $14.98 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
403
Patients
92
Total drug cost
$91,715
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Montelukast Sodium | Generic | 174 | 45 | $2,149 |
| Trelegy Ellipta (Fluticasone/Umeclidin/Vilanter) | Brand | 53 | 0 | $35,498 |
| Epinephrine | Generic | 38 | 36 | $10,487 |
| Breztri Aerosphere (Budesonide/Glycopyr/Formoterol) | Brand | 28 | 0 | $20,495 |
| Breo Ellipta (Fluticasone/Vilanterol) | Brand | 20 | 0 | $8,522 |
| Fluticasone Propionate | Generic | 20 | 0 | $256 |
| Symbicort (Budesonide/Formoterol Fumarate) | Brand | 18 | 0 | $11,632 |
| Levocetirizine Dihydrochloride | Generic | 17 | 0 | $245 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 13 | 11 | $424 |
| Azelastine Hcl | Generic | 11 | 0 | $294 |
Frequently asked questions
What is Dr. Mark Vandewalker's medical specialty?
Dr. Mark Vandewalker practices Allergy Physician in Columbia, MO.
Where does Dr. Mark Vandewalker practice?
Dr. Mark Vandewalker practices at 601 W Nifong Blvd, Columbia, MO 652036804. Office phone: 5734467000.
What is Dr. Mark Vandewalker's NPI?
Dr. Mark Vandewalker's National Provider Identifier (NPI) is 1386833358, issued by NPPES.
Does Dr. Mark Vandewalker accept Medicare assignment?
Yes. Dr. Mark Vandewalker accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Vandewalker commonly perform?
Top Medicare-reported procedures in 2023: Professional service for preparation and provision of 1 or more antigens (HCPCS 95165); Test for allergy using allergenic extract (HCPCS 95004); Professional service for single injection of allergen (HCPCS 95115). Source: CMS Medicare Physician & Other Practitioners file.