PROVIDER PROFILE · NPI 1801873427

Mark HauptmanM.D.

Internal MedicineMission Viejo, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$6K

Peer benchmark

Total Medicare services vs. 10,499 Internal Medicine providers in CA — bottom quintile (cohort median 531).

PRESCRIBING · PART D · 2024

Total Rx claims

257

Beneficiaries

—

Total drug cost

$3K

Distinct drugs

Brand share

0.0%

Top prescribed drugs

Atorvastatin Calcium51 claims

Ramipril46 claims

Amlodipine Besylate28 claims

Alendronate Sodium27 claims

Losartan Potassium25 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where Mark Hauptman'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). 11 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Unilab Corporation Clinical Laboratory · West Hills, CA	77	273
Michael Truong Endocrinology · Mission Viejo, CA	32	82
SADDLEBACK MEMORIAL MEDICAL CENTER	25	94
Steven Sorenson Diagnostic Radiology · Redlands, CA	23	80
Jeffrey Dym Diagnostic Radiology · Laguna Niguel, CA	22	44
YU, YUE	19	34
HARRIS HISTOLOGY SERVICES	18	39
Jackson Penry Diagnostic Radiology · Mission Viejo, CA	15	34
Ira Bell Dermatology · Lake Forest, CA	12	42
Navid Jahed Diagnostic Radiology · Mission Viejo, CA	12	31
Absalom Hepner Cardiology · Mission Viejo, CA	11	18

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