What is Mark Parkhurst's specialty?

Mark Parkhurst (NPI 1629154539) is a Medicare-billing provider whose primary specialty is Internal Medicine in Silver Spring, MD.

Where does Mark Parkhurst practice?

Mark Parkhurst practices in Silver Spring, MD, based on the location reported in the CMS Medicare provider datasets for NPI 1629154539.

How much does Medicare pay Mark Parkhurst?

Mark Parkhurst (NPI 1629154539) received approximately $409K in total Medicare Part B payments, serving 1,346 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1629154539

Mark ParkhurstM.D.

PRACTICEMAIN STREET PHARMACY, LLCSee all providers at this practice →

Internal MedicineSilver Spring, MDI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

5,098

Unique beneficiaries

—

Total services

6,555

Distinct HCPCS

Medicare payment

$406K

Peer benchmark

Total Medicare services vs. 2,306 Internal Medicine providers in MD — top quintile (cohort median 884).

PRESCRIBING · PART D · 2024

Total Rx claims

4,902

Beneficiaries

—

Total drug cost

$329K

Distinct drugs

105

Brand share

14.4%

Top prescribed drugs

Atorvastatin Calcium327 claims

Amlodipine Besylate270 claims

Levothyroxine Sodium261 claims

Losartan Potassium140 claims

Tamsulosin Hcl137 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 Parkhurst'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). 32 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Loveen Puthumana Geriatric Medicine · Silver Spring, MD	131	574
Patricia O'donnell Nurse Practitioner · Silver Spring, MD	130	409
Rachelle Alexion Family Practice · Silver Spring, MD	107	471
MACHADO, EUGENIO	105	377
Andrew Kundrat Internal Medicine · Laurel, MD	97	442
Eileen Gemmell Nurse Practitioner · Silver Spring, MD	91	357
RIDERWOOD VILLAGE, INC.	89	251
Thomas Yau Ophthalmology · Silver Spring, MD	61	208
Prince George's County Maryland Ambulance Service Provider · Largo, MD	52	127
Michael Lincoln Cardiology · Silver Spring, MD	52	158
Butler Medical Transport, Llc Ambulance Service Provider · Windsor Mill, MD	48	84
Sameer Pandit Diagnostic Radiology · Silver Spring, MD	43	119

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