What is Mark Vierra's specialty?

Mark Vierra (NPI 1730187121) is a Medicare-billing provider whose primary specialty is Dermatology in Poway, CA.

Where does Mark Vierra practice?

Mark Vierra practices in Poway, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1730187121.

How much does Medicare pay Mark Vierra?

Mark Vierra (NPI 1730187121) received approximately $444K in total Medicare Part B payments, serving 1,186 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1730187121

Mark VierraM.D.

DermatologyPoway, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

4,182

Unique beneficiaries

—

Total services

15,133

Distinct HCPCS

Medicare payment

$431K

Peer benchmark

Total Medicare services vs. 1,546 Dermatology providers in CA — top quintile (cohort median 2,504).

PRESCRIBING · PART D · 2024

Total Rx claims

650

Beneficiaries

—

Total drug cost

$81K

Distinct drugs

Brand share

17.4%

Top prescribed drugs

Doxycycline Hyclate128 claims

Triamcinolone Acetonide70 claims

Valacyclovir Hcl58 claims

Ketoconazole58 claims

Hydrocortisone50 claims

QUALITY · MIPS · 2024

Final MIPS score

0.0

Quality

0.0

Cost

0.0

Improvement activities

0.0

Promoting interop.

0.0

Payment adjustment

-9.00%

Individual

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$425

Payment records

By payment type

Food and Beverage$353

Education$72

Top paying entities

Food and Beverage$353

Education$72

REFERRAL NETWORK

Where Mark Vierra'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). 13 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
PALOMAR HEALTH	68	137
PALOMAR HEALTH	53	80
Unilab Corporation Clinical Laboratory · West Hills, CA	23	45
Akber Safi Internal Medicine · Poway, CA	17	30
LAWSON, ROBERT	16	18
Jeffrey Lozier Ophthalmology · Poway, CA	16	33
Kathy Clewell Internal Medicine · Poway, CA	16	41
REGENTS OF THE UNIVERSITY OF CALIFORNIA	15	36
Ken Stanley Family Practice · Carlsbad, CA	14	38
William Winternitz Orthopaedic Surgery · Poway, CA	11	22
Elizabeth Salada Internal Medicine · Poway, CA	11	39
Dmitri Segal Diagnostic Radiology · Aurora, CO	11	13

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