Doctor profile · Federal record

Dr. Mark Zellmer, PA-C

Medical Physician Assistant (CMS: Physician Assistant) · Physician Assistant · Whitehall, WI

  • NPI 1023013364
  • Accepts Medicare
  • 43 yrs in practice
  • Licensed in 2 states
  • Male
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
18606 Ervin St
Whitehall, WI 547738613
(715) 538-4355
Mailing address
1836 South Ave
La Crosse, WI 546015429

Credentials & registration

NPPES · NUCC
NPI registered
June 2005 — 21 yrs on file
Profile last updated
February 8, 2023
Year of graduation
1983 — 43 yrs since
Specialty taxonomy
363AM0700X — NUCC code
State licenses (2)
Wisconsin #507 · Minnesota #8874
Medicaid (2)
MN #874650800 · WI #42918400

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1023013364. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
260
Distinct HCPCS
8
Medicare allowed
$24,833
HCPCS Description Services Patients Avg allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 65 35 $64
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 47 25 $87
99239 Hospital discharge day management, more than 30 minutes 30 28 $93
99316 Nursing facility discharge management, more than 30 minutes 27 24 $107
99306 Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 24 21 $149
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 24 16 $125
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 22 17 $97
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 21 21 $105

In context: peer comparison

Among 2 peers in Whitehall Medical Physician Assistant, average services per provider: 33. This provider delivers 7.9× the peer median.

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
202
Patients
0
Total drug cost
$22,868
Drug Type Claims Patients Total cost
Eliquis (Apixaban) Brand 36 0 $20,794
Metoprolol Succinate Generic 26 0 $397
Lisinopril Generic 20 0 $78
Metoprolol Tartrate Generic 18 0 $128
Tamsulosin Hcl Generic 18 0 $405
Furosemide Generic 17 0 $80
Omeprazole Generic 15 0 $172
Atorvastatin Calcium Generic 14 0 $152
Amlodipine Besylate Generic 13 0 $83
Cefadroxil Generic 13 0 $497

Frequently asked questions

Auto-generated from federal data
What is Dr. Mark Zellmer's medical specialty?
Dr. Mark Zellmer practices Medical Physician Assistant in Whitehall, WI.
Where does Dr. Mark Zellmer practice?
Dr. Mark Zellmer practices at 18606 Ervin St, Whitehall, WI 547738613. Office phone: 7155384355.
What is Dr. Mark Zellmer's NPI?
Dr. Mark Zellmer's National Provider Identifier (NPI) is 1023013364, issued by NPPES.
Does Dr. Mark Zellmer accept Medicare assignment?
Yes. Dr. Mark Zellmer accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Zellmer commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Subsequent nursing facility care with moderate level of medical decision making (HCPCS 99309); Hospital discharge day management (HCPCS 99239). Source: CMS Medicare Physician & Other Practitioners file.