PROVIDER PROFILE · NPI 1508897935

Errol GrannumMD

OphthalmologyMcallen, TXI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,046

Unique beneficiaries

—

Total services

1,546

Distinct HCPCS

Medicare payment

$66K

Peer benchmark

Total Medicare services vs. 1,238 Ophthalmology providers in TX — above median (cohort median 1,864).

PRESCRIBING · PART D · 2024

Total Rx claims

9,406

Beneficiaries

—

Total drug cost

$1.0M

Distinct drugs

Brand share

41.5%

Top prescribed drugs

Latanoprost2,675 claims

Brimonidine Tartrate805 claims

Erythromycin Base706 claims

Brimonidine Tartrate/Timolol626 claims

Timolol Maleate600 claims

QUALITY · MIPS · 2024

Final MIPS score

75.0

Quality

0.0

Cost

0.0

Improvement activities

0.0

Promoting interop.

0.0

Payment adjustment

0.00%

Individual

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$475

Payment records

By payment type

Food and Beverage$475

REFERRAL NETWORK

Where Errol Grannum'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). 5 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
DOCTORS HOSPITAL AT RENAISSANCE, LTD	95	183
Clinical Pathology Laboratories, Inc. Clinical Laboratory · Austin, TX	25	39
VHS HARLINGEN HOSPITAL COMPANY LLC	19	34
Michelle Cisneros Optometry · Odessa, TX	13	18
VALLEY BAPTIST AMBULATORY SURGERY CENTER, LLC	13	17

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