What is Mark Walmer's specialty?

Mark Walmer (NPI 1629166053) is a Medicare-billing provider whose primary specialty is Internal Medicine in Chandler, AZ.

Where does Mark Walmer practice?

Mark Walmer practices in Chandler, AZ, based on the location reported in the CMS Medicare provider datasets for NPI 1629166053.

How much does Medicare pay Mark Walmer?

Mark Walmer (NPI 1629166053) received approximately $428K in total Medicare Part B payments, serving 697 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1629166053

Mark WalmerMD

Internal MedicineChandler, AZI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

8,410

Unique beneficiaries

—

Total services

15,314

Distinct HCPCS

Medicare payment

$421K

Peer benchmark

Total Medicare services vs. 1,880 Internal Medicine providers in AZ — top quintile (cohort median 646).

PRESCRIBING · PART D · 2024

Total Rx claims

11,079

Beneficiaries

—

Total drug cost

$630K

Distinct drugs

150

Brand share

15.5%

Top prescribed drugs

Atorvastatin Calcium760 claims

Levothyroxine Sodium574 claims

Lisinopril426 claims

Pantoprazole Sodium383 claims

Metformin Hcl339 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 Walmer'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). 26 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
ARCE, MIRIAM	49	152
Daniel Klee Interventional Cardiology · Chandler, AZ	35	184
Jagwinder Sraow Cardiology · Chandler, AZ	35	131
ST LUKES BEHAVIORAL HOSPITAL LP	28	66
Melissa Gurley Interventional Radiology · Phoenix, AZ	27	86
Denise Kulesha Diagnostic Radiology · El Segundo, CA	23	56
R M Arizona Holdings Inc Ambulance Service Provider · Mesa, AZ	20	60
BROWN, J.	20	110
ST LUKES MEDICAL CENTER LP	19	28
Bertram Matsumoto Ophthalmology · Tempe, AZ	19	49
Rosemary Geary Dermatology · Chandler, AZ	16	35
Andrew Cottrell Diagnostic Radiology · Dayton, OH	16	41

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