What is Mark Gunby's specialty?

Mark Gunby (NPI 1699886309) is a Medicare-billing provider whose primary specialty is Internal Medicine in Saint Louis, MO.

Where does Mark Gunby practice?

Mark Gunby practices in Saint Louis, MO, based on the location reported in the CMS Medicare provider datasets for NPI 1699886309.

How much does Medicare pay Mark Gunby?

Mark Gunby (NPI 1699886309) received approximately $54K in total Medicare Part B payments, serving 315 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1699886309

Mark GunbyDO

Internal MedicineSaint Louis, MOI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

513

Unique beneficiaries

—

Total services

626

Distinct HCPCS

Medicare payment

$49K

Peer benchmark

Total Medicare services vs. 1,563 Internal Medicine providers in MO — above median (cohort median 658).

PRESCRIBING · PART D · 2024

Total Rx claims

13,271

Beneficiaries

—

Total drug cost

$959K

Distinct drugs

158

Brand share

20.1%

Top prescribed drugs

Atorvastatin Calcium851 claims

Lisinopril694 claims

Amlodipine Besylate542 claims

Levothyroxine Sodium490 claims

Simvastatin374 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Mark Gunby's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 38 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
MISSOURI BAPTIST MEDICAL CENTER	668	3,118
Jean Berra Mueller Nurse Practitioner · Saint Louis, MO	218	571
Christopher Thornton Diagnostic Radiology · Saint Louis, MO	77	144
NPI 1407879562	67	164
Jamie Colonnello Diagnostic Radiology · Fort Collins, CO	53	114
MOSHER, AMY	37	90
Quest Diagnostics Clinical Laboratories Inc Clinical Laboratory · Maryland Heights, MO	34	82
BJC HOME CARE SERVICES	32	71
MERCY HOSPITALS EAST COMMUNITIES	31	100
Thomas Kirisits Podiatry · Farmington, MO	30	86
NIEMEYER, JOHN	27	69
Erin Gardner Dermatology · Saint Louis, MO	26	59

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events