Doctor profile · Federal record

Dr. Peggy Wanner-Barjenbruch, MD

Internal Medicine Physician (CMS: Internal Medicine) · Mexico, MO

  • NPI 1326023185
  • Accepts Medicare
  • 44 yrs in practice
  • Female
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
600 Medical Park Dr
Mexico, MO 652653724
(573) 581-8500
fax (573) 581-5397

Credentials & registration

NPPES · NUCC
NPI registered
December 2005 — 21 yrs on file
Profile last updated
October 28, 2022
Year of graduation
1982 — 44 yrs since
Specialty taxonomy
207R00000X — NUCC code
State license (1)
Missouri #R2F18
Medicaid
MO #202222303

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1326023185. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
2,418
Distinct HCPCS
10
Medicare allowed
$218,385
HCPCS Description Services Patients Avg allowed
99214 Established patient office or other outpatient visit, 30-39 minutes 944 395 $118
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 254 45 $143
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit 238 238 $152
82962 Blood glucose (sugar) test performed by hand-held instrument 228 191 $3
36415 Insertion of needle into vein for collection of blood sample 153 132 $6
G0008 Administration of influenza virus vaccine 152 152 $30
90662 Influenza vaccine split virus, preservative free 150 150 $67
99213 Established patient office or other outpatient visit, 20-29 minutes 120 96 $83
85610 Blood test, clotting time 52 13 $4
81003 Automated urinalysis test 45 40 $2

In context: peer comparison

Among 2 peers in this city , average services per provider: 136. This provider delivers 18× the peer median.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$115
Transactions
7
Manufacturers
6
Payer (manufacturer) Industry Txns Amount
Otsuka America Pharmaceutical, Inc. 2 $31.96
Teva Pharmaceuticals USA, Inc. 1 $20.16
Lilly USA, LLC 1 $17.47
Exact Sciences Corporation 1 $15.58
Amgen Inc. 1 $15.40
Novo Nordisk Inc 1 $14.06

By nature of payment

Food and Beverage
$115

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
7,386
Patients
1,505
Total drug cost
$92,867
Drug Type Claims Patients Total cost
Levothyroxine Sodium Generic 991 215 $13,915
Lisinopril Generic 657 139 $6,853
Omeprazole Generic 635 135 $9,625
Amlodipine Besylate Generic 623 127 $5,425
Atorvastatin Calcium Generic 601 122 $7,093
Pantoprazole Sodium Generic 530 115 $6,737
Furosemide Generic 481 93 $2,914
Gabapentin Generic 466 84 $10,469
Potassium Chloride Generic 437 76 $11,198
Losartan Potassium Generic 363 76 $4,201

Hospital affiliations

CMS Hospital Compare

Frequently asked questions

Auto-generated from federal data
What is Dr. Peggy Wanner-Barjenbruch's medical specialty?
Dr. Peggy Wanner-Barjenbruch practices Internal Medicine Physician in Mexico, MO.
Where does Dr. Peggy Wanner-Barjenbruch practice?
Dr. Peggy Wanner-Barjenbruch practices at 600 Medical Park Dr, Mexico, MO 652653724. Office phone: 5735818500.
What is Dr. Peggy Wanner-Barjenbruch's NPI?
Dr. Peggy Wanner-Barjenbruch's National Provider Identifier (NPI) is 1326023185, issued by NPPES.
Does Dr. Peggy Wanner-Barjenbruch accept Medicare assignment?
Yes. Dr. Peggy Wanner-Barjenbruch accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Peggy Wanner-Barjenbruch commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Subsequent nursing facility care with high level of medical decision making (HCPCS 99310); Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit (HCPCS G0438). Source: CMS Medicare Physician & Other Practitioners file.